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 0x9c3a8cb0de24ea961ddfaf3ba490d8feefe8e12482de75a4e6c90804db16076b. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d51f626a-35b4-420a-a63a-6b4c9dd4cbd5.json and https://artists.proofprofile.net/proofs/artist/d51f626a-35b4-420a-a63a-6b4c9dd4cbd5.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 0x09f392988b53cf78373cfef8558e9e4659aadc58658b4b1c0f74843f84ae319f. 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/QZK6N2097035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f31c526e25cfe9f43ed81d64cb1b3cf8b88dee204b256be6f78ad315414f74. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA012108247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ff3991f9daff517c65ba3650e369c9e7b58e1b2a4230d3bd65542004b9131. 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/ESA012108249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0477edf9db535ee66631136cd5a50334035c89765aa511992105d5f4a9d2c5ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA012108255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c69c594724265ae0723a6d725bd7448512e9523f28e8cbeeeab82db2441bee. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/ESA012108251.
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 0x09b6af9ecc78cfae95a4edd2ea294a20319f790a632f8411f0dc52f325aeb788. 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/ESA012108252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a69c993a30694936a1d4ad627f78db5ba794c79dab5590cc6e9791b2ea8f59. 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/ES64E2202470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6daac4bafd915ee7edb896de8dc6165019d69b7f654b94c5517b8cc74a2ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4Q1958855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5c4dbe57a254b152f88c49301ef1b0841fdadcdce51283d33c4b5ac6792fcf. 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/ES6081540301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23aff4ed3f1a274be07d28362bd2ac0529635e5d9d1ec87a286b8b3f9e0896. 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/ES6081540302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5a170e0799d773714324a94f75403619b5022fadb7af84371a3285a0c542c. 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/ES6081540303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6e0502729a6977376d981fddbd0410fb89785eecd22ec806001ea860122c8. 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/ES6081540304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fca608605b81ed1d55f03a70c508676f1a66a64e825dcb2ef8ee3affcf0bdb. 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/ES6081540306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6346ef200868cbae1b3d3fa7ca74a8e35ea5db9ee2627ca0d11999efa3d1a4. 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/ES6081540308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ebad42d8a156352f7b86017a879d5b7bdedbe38aaa786f6ef98e37ab532f1f. 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/ES6081540310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eccbe3c9f5c208bfc8725581c5183301a5905ed28a3dc9591138533cbadc1f. 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/ES6081540312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fdb4dc128b368692ab02991ff200626d5ec8e0bf6ecbddcbb869d4e8f53964. 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/ES6081540313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d8a973cdf89ff0e45753dafc5877d8a9617ab68649c5646cc1235a74bce9a. 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/ES6081540314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1d45e95e9d99acb3edf3a25de69193f3c166866ece52c8c438643b74c7a43. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES6081540309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d0a86bae0971040d8d7b70aa0b25fc92c5ea4d60975ff5ce967a112a31a43. 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/ESA011207899.