1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea10db24e08a546a66a2c79b3937b865acce079bf94c9f81f9d92d443a6159c0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59627875-5833-44fe-934d-ca180efbb47c.json and https://artists.proofprofile.net/proofs/artist/59627875-5833-44fe-934d-ca180efbb47c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8132527b7913bc0cf060c02ac498005c5e1d2c263c6cbbea79d58b195248d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2124858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ea5659d3bda66cec1b6c1f9dd2b1368946f7f40bdb3c7ff2a0445d6ef7f9c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72208654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a386d96780114920fad6181915a1d450bbf265ae196ee3660558986e0d273c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2290795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b67b0e07b0dc7b2bf08c7601b1598d7970212f58b4d218517f70cbb1f5050. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575bc4d0540f154516a32b0be2a2dbc5a68566992869a86f43ce07d216ac7f6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb210fbc6654b0d9f79d7287774517046583035fc3552db4caf86cc56af88c15. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1497e76efe0b60bb3763bcc3069531e22057313c89267a1533d6a5fbfd4511f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42168832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3880e643ecde5e7d08db8a45ce71f2237be9e70f498ec188abbe72cd93ef48. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1374d77943c68fcd4e48d130c5fdd88c7715dea84739ab188b16556c0ae922f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb462c2ef69135626af8d64286e46482230bf8a496b280bca3c535555b1f66aeb. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67a8e1c2f1237101733576581acd3192eb5b3e0a4da6efa1a2f51bd38edcd1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5177d0e6604af891263280095f005f0c23e47397a56da7d1846ba522719c8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec462dfae7d9669f309a03fafdbf2734d603edbab7930b8022de1211a4518b53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee11a2ba97e38f6260524bbd01b13bac8be21e1b23801abe3b2fd534821331. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372401196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5177d0e6604af891263280095f005f0c23e47397a56da7d1846ba522719c8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67a8e1c2f1237101733576581acd3192eb5b3e0a4da6efa1a2f51bd38edcd1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc67a8e1c2f1237101733576581acd3192eb5b3e0a4da6efa1a2f51bd38edcd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb462c2ef69135626af8d64286e46482230bf8a496b280bca3c535555b1f66aeb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1374d77943c68fcd4e48d130c5fdd88c7715dea84739ab188b16556c0ae922f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3880e643ecde5e7d08db8a45ce71f2237be9e70f498ec188abbe72cd93ef48. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3880e643ecde5e7d08db8a45ce71f2237be9e70f498ec188abbe72cd93ef48. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb210fbc6654b0d9f79d7287774517046583035fc3552db4caf86cc56af88c15. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575bc4d0540f154516a32b0be2a2dbc5a68566992869a86f43ce07d216ac7f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b67b0e07b0dc7b2bf08c7601b1598d7970212f58b4d218517f70cbb1f5050. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES372300925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a386d96780114920fad6181915a1d450bbf265ae196ee3660558986e0d273c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2290795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ea5659d3bda66cec1b6c1f9dd2b1368946f7f40bdb3c7ff2a0445d6ef7f9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72208654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acd11a0e0b55079f88677d72bc0468faf4c888ab7f3841670bccbb9aca4ae50. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2157526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9602af19113b0f99916adbd1244ab26357397ba927b8ffdb442f6a410c8fed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2113868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1497e76efe0b60bb3763bcc3069531e22057313c89267a1533d6a5fbfd4511f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42168832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fea020e649698571a276fff966c1e05b34a23ffd39a9f615c7e3c368b4a882. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2033418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a88424e979dfe4549fcbccf9cb0dfdff5e3be86e806b6eb005c965ed80f4483. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490546eaead27d8d7fc60592013af43494b51a837a3d96e41ab3589ad2ff2e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ22063720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c150a2f50895a7c26ee5d2cab875ced8eebb7c6e2c65737c6b000ece582a79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N1920149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b39528496de1c75172b6aa5f2864d41ff2cd9c55a646a81a57019071b074f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ21935186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd5d60aa01b308dbddbb82c9a38666c03f9881a583b36d377104ff57bc93fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES71910500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0072d40b436a568fe99a3bd1a3860d42481ac497cf0410d8eb972d89cbf49f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLR8C1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdba3b87dc0508a312a47ed0014f6ae286fa51636912d9f24a04e7c74b2f941. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11825894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cd76e7e920b5ca6fb2eaee5bee5ff2d83a1d0f573f1331de955a21a11e87d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11725661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb97d85fe543232aa16b8ae561cc2e0571511308f45fb8b5d81bae9bb9b1bd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11725225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2580bad1a263e1504911fe6b985adfbd5ba2b3d84a4a8618ad5d275f7b0d8639. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11725028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4729be337bcb3acb6dddebf4f2d545a740fbc8797aba1bb1abcad726ef1b79a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11724776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42571e1021cfed1eaeacf7118d5db6ee5ff66c4b2f9742e18430ff805bdbc9b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11619638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b304e1b90fa8a62c527465a5201bddb688a291ffef11ccf002a6fb63ee4a4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLPM11619691.