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 0x0b3d88961301cb7bf2c36fe7bc8c3103c12717dda3306a8dc85f68a0459ce4f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29b61c54-0e71-42e3-bca2-0f2964f25521.json and https://artists.proofprofile.net/proofs/artist/29b61c54-0e71-42e3-bca2-0f2964f25521.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 0x0ecd70c6ba5ad17dd6e4b4f92f50f7e81e6ad371f87e384d1bfda8af3c00a333. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES6641200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341678a97e075f3fe787ce5482cd4172dbafe7e9488ef942a1019fec8a84a543. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ES09S1600625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea2c746f1808bc84715eef35376e47483ce9cd8fc109405687d05c2071f5ad8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:57Z), 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/ES09S1600631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2d16eaefab1489495833f3a2671c14e6b41518bb64d00314bf28b792ea818c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES09S1800383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7e1ccd5dd4cb6cc2ce227ae7294c3653d6f95bb5bf249b2524bd047b6f7ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES09S2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3081d4e924d279b9963728c51e9e32ffa50546b09621f10e29042cbf852d4ccd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES09S2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18e2a58e59eab502859e98cb4b960e4822f36d40aeca0ba52cb8c620368e76. 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/ES09S2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e2da45a7099cf3f39367d610be1dd318be5ea08a4a75fbb6d5ef25c789c02. 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/ES09S2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd163f7c280d6d552e2bb095ede6d87af22545b206959625b4544dd574ab0c091. 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/ES09S2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecde2fce243ec3b30e4a2942ec77b73f301d6160a8ea9900470a41ce8880a25a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES09S2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c287d93605173634f60ffb75dfd85032905e6b663c9d6b7788d07ee907fee7. 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/ES09S2100041.
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 0x03e61377b846d2a11dfc23d68a8a84edca62aa85831992db7e5e315817930ee7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES09S2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556e4a6faa0732111d1fa1087073651bae6308be608bc2f77333da7f14dfa7c3. 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/ES09S2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf9342c247ffb749565a7eb11a54ff456866de2f09dc46efbd1b0b960c6943. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES09S2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be968cb2a037d029bd296784ed3d4826c381b1d220f57e27b0f27ab66b48a7. 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/ES5702400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd35630b9ce8f68520e6b91c412d89aa08ebed96b96f773de73ab167f218c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5702400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b096bfb32f93305076994b4fe19488df393f6133a7f9a62277b7e458515180. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5702400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcf9d94f163152e8f4388355009e73736cbfbbceba099cacf25e85f1531b3ee. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ES5702400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c295e416bf00aa3d375cf1ad41fffd8be8b781cf0fe760ad5aab28bb84e5c0b. 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/ES5702400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bf3ea7a6e16e5208e015a8b9df11e3897ebfb0ac4c53bdc09a0ff8f2ed41cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5702400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df749fe306d44dc9544b34aeb886bec23d3f4afe8de45e472d12a92bfae5d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5702400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2c480b6bc8ce9e467f505fa6c7f691bff9a3dbee7b93d9e0d5b66b287dd6d5. 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/ES5702400134.