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 0x185f280465585eb17757ecc626709fbaca43ce778c35b3c3838aa0175ea1eba0. 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/796687de-ce9f-4799-bac2-671bc2fdc4e6.json and https://artists.proofprofile.net/proofs/artist/796687de-ce9f-4799-bac2-671bc2fdc4e6.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 0x880f3910dec282aa1702ce79f1befa8e451b87ec81c84376cb371e88ff6c4325. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762374341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c723c98b7d544115f7fa8b15a1e8f6d9d6931857e75726dece4dff75c994bff. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P2326892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c589fe8424a0209dc1e4d358cdaa0743fd3f9708ccbcf3aaf243baf185789b3. 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/USA2P2330817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb3f127b2eacb9a54ac41a930c83822be0a77fe7ca5d0d2944f7e55ea6df55c. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USA2P2335931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f9ca8febff2a322a1e13d6f1940f537a7502f24d61bce9034cdbc861594bc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0L2365907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7778f5e468f2f6693dba949f3f2fe64aaaea66301af9b570385729fad0d554f. 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/TR0532315684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a28b7dc9551efc9a44ba6d99d9a1f3e1d27c97f37944e66cbfbc08504679561. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TR0532415702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875e52ac8b8b7ae7cba2e66648a7867bb28c4d479e55aa28b996870ea5ed0a9. 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/TR0532415761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb90fc38a8e37e91d03e2c7328f7eaf097c02b444523778d42cf630137c5d30. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TR0532415853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096dc3e3b0e3d26d6d24bc22e821ffd3a43e325586e199afa915b6d4727597f0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TR0532415933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634da75c4e3622dff15b70da0047e5ab5cf8f2f1cb2a850d2ad526fb750d745. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/TR0532415954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb33f80c63e4e63381a96275e9efdbfefa47d4b9c341aeecd464c4cf5ab23ae8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TR0532415963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe583f0b2242902c1dc2074db7618252d50ab299775e774fb84e66687003e27e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TR0532415964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e1a225cf664f02432c74fb027792ea402cc87c73b38448519a5c44756138db. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TR0532415965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ba22cfdfbac24ab790f01320a1d2ac0071ab69ba89a0debcbb282521711d9. 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/TR0532516121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79a09c5d3e4a3909169ca12cbf0f4a03f958a896d7d6fcba2b585fc50866aea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282204206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0c087ac336cd0082b621e306fca70120d4835065143197f476d96881e5e17a. 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/FRX452306461.