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 0x1dc453f41261ac0dc0837c1abb26a16fa1addb687a4f9ddaf3ba538f689ba284. 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/5287da1d-3ace-4665-8e43-9b0b2b6a90c7.json and https://artists.proofprofile.net/proofs/artist/5287da1d-3ace-4665-8e43-9b0b2b6a90c7.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 0x2ab2ad1e0ce650652b632dc756078580f1b19987b22b7b68072c7c72fa004605. 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/DED832000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d5f5f66192bd7984b5d84177f2726c10e42e39515d0ddac094f8511362354. 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/DED832000438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151c49e3e47023e0403a8b461d87480f3678b3e8e79792d712cf87eaa944617. 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/DED832000439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4cfd7d5babda92a792331c98b0e056434dacf1d4fc76d0edaad37eb746dfaa. 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/DED832000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3ad048908cb837d283aa37111ecc1f370fb762e6c3b44e5e8a8779b926c893. 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/DED832000441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db1feedcf119340c2b741917e27cda31ba41bee16b13530c4c1c588b8a81c43. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DED832000442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b17dab3fec7610f8ddf2c411815ce37ba4407b3b8205cc4405354a5a7b8ae41. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DED832000443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b58d2ef5bf175762b72cfeeea9c3a692663a3b6b64713fbdbca848b04fb4e7f. 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/DED832000444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8490eea75fde3e5fdb992e37a39662a2d78377e0f5bbc71ad759ecf8dd8a481. 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/DED832000445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1613bb42839831d1a2d24379db4b1d0d714d983bf3d2eb98f07a140d1449151a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DED832000446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08be257abc761682f332c293934d486265bab046b7504c9f639df6d98b12615f. 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/USLZJ1702149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65298c5e6e385b992daf8892d6e1a720850e672a37813c8e147d2dd764d4aefd. 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/USLZJ1702150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850af9150534e1409515aebd74d028ce141fd58b299bc8a29053115f531148e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USLZJ1702154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c693a6eeb705af3152445d8817272adfdf5239a494107bb2670206547d2887a. 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/USLZJ1702157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc448ffe6d06aa15d84105c800c120f58e00e28fc001115e7b3c83365e82f9ccd. 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/USLZJ1702160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76a760ca777569bda7562175020f2e7c1cf2b65339093a5c70c30d508be0d11. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USLZJ1702161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdb2031706ed96b4ef6a475386240a0de17d38d555e6408698310106c5712aa. 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/USLZJ1702165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5096ab281b0085a8348a1fca48dcf49f99db26484b64a554b719e71c0ec6fa. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USLZJ1702167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547b7667cd4b2cfe64cd7fbcfc9e7b3f2fb1e563c55b8f4b92e176d77bb0d076. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USLZJ1702170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95da088c492c87ebe4bb29202fed0591565d3edc66be76d76a9c6021dfb61b47. 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/USLZJ1702171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4b2d33bf6592254b668cc8f973cb9a0e448afac0f52bbbcf30ac067ca38c24. 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/DGA072370191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273bc502da3839c5647d69558ea1d694cd9a8e0d011e1cf3212e8339486a1782. 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/DGA0L2373675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5e767520985d078755bcbe9afdc58b72c06d95fea20d20663f91cb46014247. 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/FR59R2478921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90445dcf3a211ffd64470dd37e3af7e984329fcdc1b2f40a4ca026a3d15a0ac3. 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/FR2X42417425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eefe3416b59b5164925c2f7bdbd3c1c9860e08aeebf0816ee0cb214a563a9e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR59R2478922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273bc502da3839c5647d69558ea1d694cd9a8e0d011e1cf3212e8339486a1782. 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/DGA0L2373675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4b2d33bf6592254b668cc8f973cb9a0e448afac0f52bbbcf30ac067ca38c24. 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/DGA072370191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d11330b9689bb9b79a1bc5a153ee8e0134ea7e8cc867201183317264a42e9a. 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/QZ5FN1805211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf3d1dfd6d3d88191ceb2c784e15a7a53ee4097e5dfebe77c766117e03c6399. 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/TCADE1766510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28deca5bcb4970db59e581835791b8fb0755de062c0b66e52a8e7ad8c82c52. 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/QZS1Z1631805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd11ca1a2ec0b07ca784facc37196179d74db2fb19a89e897ca959ab50f94228. 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/QZS1Z1631782.