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 0xdd7a974b8619ec760de19852aac02f67537a4f24840f0b987ae985d9293c14e9. 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/3f5331a4-08fc-4247-9c17-86acb79aba9f.json and https://artists.proofprofile.net/proofs/artist/3f5331a4-08fc-4247-9c17-86acb79aba9f.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 0x910bc7a1983093e997814dd6366bc54f87d56a81587471fb150a61d519d76882. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAY2597526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6bf17a1b04e25d1285f6fef43ea53a296d1a043a9f22f8f91a42a6daf6d8a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:20Z), 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/QZTAY2597527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de49b64fb242c1f8ddd6692de5e1e816b0805e95c64f93eadd9bdd4457733ed. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2597528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1029ee7c997d4636f6646857b12236da719e2c561f7fcf61a621f8659cae78e8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:56Z), 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/QZTAY2597529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60df5b5255257f2936a43d5b235a88a795096ec9d99ad6e10639ed12bc497229. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTAY2597530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc965d8b7115b61e2e4b78eeddc3dd3e83dd014e15e8a32b9cf1e43172b742379. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:51:37Z), 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/QZTAY2597531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a9595034f124c716dcecd0aab00e1d418a083858088079a51389e9feec5d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2597532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd297189a6b98e01b16f496f88bcc7ea3a3da6260e4ced46f30d11b3beda4e92. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAY2597533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f0ecdf94475e22250596fde83e4a6f18cc3d00111cc38ddbce6222b00e38a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAY2597534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76deb35c9c6ae5bb2823b3748a5f223400a7a18afa38362d31b455f7190b256. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAY2597535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b7ac841303067829295ad105f7b12835e8e25d4eb8d8b635de95bce52cabd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:23Z), 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/QZTAY2597536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130191f5f67dc9b6c962b4b66e9a32cea3e7485115511734a85bfae1f387e15. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAY2597537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd006983f572a76b2b88c4d1a7bc8985866e328f79b3d7a5f355d0bdcb5f9f2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAY2597538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c76f3a5368de6ca9811ced2ea4cfbf85fa277c449d5983aa5dccfca49055b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:00:58Z), 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/QZTAY2597539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ae6f6c0d0a55c367c3ba209c212362d94f26d77149e7f573592004a14bf389. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2597540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccb81e574306089327131e09769bfa8a17491c433138c5ad6dd966d0a01fac1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2597541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7305b46fe9b3ccb94a455957ec210697a4e1f1b4c8f5480250d62a8b5cf0bef4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:12Z), 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/QZTAY2597542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1b3ef1c47adb48ed6512721d792ec8451cff87a0b78af1a8adc6dcb5db1b01. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:34:33Z), 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/QZTAY2597543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988e4d452a783f16edd662bd40dd754b1e3429d69c917b57d507a1ea7d60757. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:21:44Z), 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/QZTAY2597544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f06c4493a3aef13a661d267d5b5c141a66e14a322e4f8f08b36eec50a1d537b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAY2597545.