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 0x6a6e68954a22d999d5cbbcc3436ebcbb65190c6af14a14a2a01b3e079975139e. 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/8629f028-a228-4145-9901-cdd26c3c639d.json and https://artists.proofprofile.net/proofs/artist/8629f028-a228-4145-9901-cdd26c3c639d.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 0x1ed8643c7071823478738fdeb3da0d4f37c2e592d18b7d7ada1fc2c51d170ced. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAEP1905524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefe9b78ca25a00a2ccabdc7dfebfb244294e217090974c6f8c8200bfec5a8f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAER2020899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b2bb7441c91da97e343fb663716fd0cd1baece36fad493c35af1ec2ce9932d. 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/UKJ8H2010157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9696c9196c7a4af09af44d0b1c0a90ab1f6a59c2f5e8d967feb690728a9b3045. 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/UKJ8H2010158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542177f3ddf4869e8b62d5eb9893a1c1284911fe5649c36c0d2f27b3faafa5f5. 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/UKJ8H2010159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4b8a946d81fb964f0cb451893db3920b6c54ffe0f981b8618067cddecbc36. 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/UKJ8H2010162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c66f013b9b6d4663b2b72ea0b6b9fa61d3757f9ffea4a03cd259b0fa1450a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKJ8H2010163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8232ecc2440f780685ae5646c0709c459ceb8b128b410a1c477e2bdf669c6f4. 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/UKJ8H2010165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7567a454a9585d190b0ffe721f9269efa37d17acbbc65dfc1784da393cb5d27c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKJ8H2010166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4509f4f23e8c5c293304259da403699fa0750b6b794250424e792d6c18a0cd8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKJ8H2102329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc63407a055ad25a96c119a57ef03d1df01f850cd161083f2b9d6cbd6025e2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKJ8H2214030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f441dbf8a7f6f9b78be68b7b59c6dfb3f3ecf19ce5b241850369e901b175c9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/UKJ8H2214261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0093ee37581ce6a6d43acdcf83dea3017440c7fff163affff7d3eb6ccebb33be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKJ8H2214262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a8a3c187de0a0e84352d10e31894aa606712c1fcb01429ef00904393d963fa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKJ8H2214263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e768bb11e19cf48f203197651d7222b16fa44256dbcb034f38be80679eeaf0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKJ8H2214264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937642f25b816553db8c194461d61fab9d140f9ba669645d0acbe93f585fb8a7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UKJ8H2214265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d2ea8e4dcb5ed4f44d786584199a3cc88ac8414843de5a8aad3558055b5c73. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKJ8H2214267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e8b60acebaed48fba15699d52347ce2558297cb206238a30b62ac97614b1af. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:53Z), 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/TCAIC2446846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb39d87f43de29436cb3880fe6c4f1bcc6609a6248b053ad59154576cb70cd81. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/AUBEC2471066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62ff3cd52f09394440428d59ec00e3b0cc1e04832a17fd27dcc085fb5ab9ab. 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/TCAEI1912728.