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 0xc7ac245a62bcc578f4d90301f79405a2fd5fc0d179d6721cf2869319497e9058. 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/c2e78007-749a-4144-84c1-cd75f3bf319c.json and https://artists.proofprofile.net/proofs/artist/c2e78007-749a-4144-84c1-cd75f3bf319c.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 0xb3c489f0caf34944ce6119dd567f1fa1556b99f0131f1256988fa41a684eb72e. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QMQEE1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63924d8d80e5f5609c89e5d00d0d9b8195505044fb6b8792edbb7d245d34e7d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1353691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea06db9330a92b988ab470610aac02457ffd1ff5f8711618760854c1a18f119c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBKPL1379034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb4adcb71a273f48cf03a073c22b9507cbe49e4e7f75da84c725d87b4d4d27d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1379037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea06db9330a92b988ab470610aac02457ffd1ff5f8711618760854c1a18f119c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBKPL1379034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb4adcb71a273f48cf03a073c22b9507cbe49e4e7f75da84c725d87b4d4d27d. 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/GBKPL1379037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbfba1da122aa517d12c1067244d237991b379ced596616b80586b2c3782a54. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBKPL1777060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb438142b8702f40a844578442a4b6156c50e785ac67c565469a45c84a3730. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBKPL1777066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ed25323ce210950fffad50c847ad31d38c7b06fc9d3fa90faafe6b6e5e248. 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/GBKPL1777067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeace8031d2b0146ddbd6031b7a931591c38ed2081f77a388777741ef3d1fd64c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBKPL1777061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f15fcc94015e5d501da2ff6e6c0e46dbce2443bbe6eba654a7191369ba8e477. 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/GBKPL1777062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca5786014d2ed0cd513497defeb57b4dc7becbab74e9a41b529842423ec3f9. 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/GBKPL1777068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413da95009b1b0407e21010b311110edc7bd56b4509394185bf6fb84953cef4c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QMQEE1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb87f85086929c0ea8afccad89bfc56731f8e8c57e405b2ff85b9d7a3fa6e0. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QMQEE1600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df054d5aba1580d42133b43d65c8dc6929f8be3acd017c9fa12de469e40e057. 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/CA0RZ1900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a04fd80dee0e064e7747d65fd1d8206f9e9b80b22223e4581d96e7b3d29ce7c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA0RZ1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd5a85e98ff5aa330444c8dafb36c820970ddb59b524bafe9e5fc8c4ba69650. 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/FR96X1975427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7838826fd1416ccdf2825f45c963bdf43b493392c9bdb4301493e2785924a4c6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR96X1975428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b51ec6002acd70e76a524a5a096bea64bddb6007992b5ed7bbf710af7751df. 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/USJMZ1300058.