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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041b6dcea405717c074248f7361486cbdb97fd1b039499711adbf6dad9cff51b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/416e44a8-0b20-4835-a7d6-b41aa0d61b2e.json and https://artists.proofprofile.net/proofs/artist/416e44a8-0b20-4835-a7d6-b41aa0d61b2e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782ee277d48f8eba9148776cbf4bcff1c8c191b6d17b3e7c6ec38f2b9d34fef9. 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/NOAMM0400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d31ac852e0bcbd666ceb34bcc2153ea3f9f3c4b359b5424a40836e32abec213. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUM70600539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd41a0c168dc337aa642462c45b6088a58926a12c5984e0a7a30fbb7646f5ad. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUM70600540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a745f05cbf3bfe7fe38a3ba98bd5ad160342ec49092f326e0c9c88e8e2bc97b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOAMM0400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b3f7533976c1aa42d713a92ad9e8dbda37596b5115889c105f287151d92e4. 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/NOUM70600543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9017ffe84766e4e4e230e21658395c4527f2e1f510e1cbcf4da677eac0a10b5b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:48:54Z), 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/NOAMM0400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8578d51f3071e9ed3d5e5b485e459adf349d477ebf5f3c37b875b80821a81b22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOAMM0400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66da41c5e4652ff966f95afbb041c30ba62c5c1d00d5943de86b1fd851d3b15. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOAMM0400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15310a13bf5c4ef0b4626968a41970517d3c872aa0fe954c709259b15725c1d2. 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/NOUM70600531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25033a9345c063472582aac8a586c14b8a60ac714bcf864cc5ebbbe84473335d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUM70600528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3fd371827acc720f53824b4fbe1c3ee763a5c403301bdcb9211988853ca38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOUM70600534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed910b5b9b71cfb2b55d27f8917eb4d3d0cb82c0b091e429f78e420550a98641. 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/NOUM70600537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f46511591444bdefeb08671a6250f0b5bdc19db607fd0360e54e98eb5c5ae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NOUM70600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7249ab74bea52c3e0778e23e6658ac49c9c1c2890c6fc69a8e5e9dc4011f4fc9. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NOUM70600536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f535535179bbaa478528693d7da264e92fc1e11f507fd2826c3e8133204bdae. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NOUM70600535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a17a003f0d951650c4f81cef36238756fd2810726e81a8845f8bd2c35e4f726. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NOAMM0300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a515d6538915fc13a1b76d4ea2586516c81cdb3df063ac80f3c290d8ccb62. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOAMM0400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6166fe8e2e8cd57ffc864f7553d6094a965632f0c29b73f595002ccc5d740219. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOUM70600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b8c1f4fac9f787d83595008cb78bccc948ea2eddf748e5bee028cd4d1c277. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NOAMM0400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934866a59ec23fd26c65912e316ac88135e86cb495132ead1ad92b7743610f9c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NOUM70600545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebca9f8eef34b375d8199f40ad055ea3d16eeee241aefde76a3ec10bad5d7abe. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOUM70600524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b5f38e2950e87f7ff8d5938c8b5e77dad15fc79015255026b0f79837698d3. 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/NOUM70600546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29657c2d30a7c014617911e0ee15b599adcffa1c5c5f5e8ab5e2a297d2a4532. 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/NOUM70600526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb185cdc3b1685dd5915be5ce8cb972ad621cf239c65e1aa7b80b1de1faa440. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NOUM70600532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd6ac303f8ed3f054b6a5326f4af221a8f2d6d7c6499e9bdbbe5dfadac17f06. 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/NOAMM0400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa834d71dcd57cf1fafd4253125c74b17e3b4e24ead0e33f45beaf4163a8e6714. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOUM70600533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3181802f65ad1bde3ba599c94d0f055b4c7472e33801179a922070a2c3922. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOUM70600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe47d2cc00c0cb54887c4f9e313d216acaccd7410132272c5207d0c5c057507f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NOUM70600529.