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 0xff4f4ffb420840a1e75831c89335c8571965d10ca720334539a89fc676ed3b6e. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5d628c6-549a-4fd8-bfdd-10e9098b07f1.json and https://artists.proofprofile.net/proofs/artist/d5d628c6-549a-4fd8-bfdd-10e9098b07f1.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 0x85ec9bdbfcf23cbb8701ff4fa299a9dd8b7d9ebe9e5a7d5cf7d0c82d0fecddf7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU3901460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322abb95198083e89c2887cdda8f9ccbbff7c95d5766ab12f392836918b8100c. 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/GBSMU4805805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a0b03e76c5e45e1a7e7b98f022e2cf11511675e90fdd9855ac7f27fb067a6. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM4DW1892609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d9a0e6674040dee8ea241ab88f0517b5ce0a4f316a547dcf34b003b7701dec. 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/QZB4J1895591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99c98cc765e8848b952a67c976829d0094188150c2196f6aaa68a768ff5b85. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2575958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5436888fbb844e8905fcbd2680e0cdf0b90b0b515e1a9e097bdcabc73f8de579. 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/QZK6J2575959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed888ef51d6a702af1447a2ee96774f8752c461ca60ae4a8e5b0a0144ead7e5a. 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/QZK6J2575960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e33f4afae834f46284d4c3a689f4bf8d74597214532b9e456599359df1d65b7. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZK6J2575961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6432578c5397da2f4ef71a23aed2cbb2fc41a7da2c8c66128270333c092970fe. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZK6J2575962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51506be43fd201e303377d767b3f0ae51cef78dd294a8a74ca6740c41d2704f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6J2575963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dbace3e6aa649fe66b7d256d959ae28a091a52b9b0daa36aa0cafa29c82943. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:25Z), 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/QZK6J2575964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7160a0549ecb95f884de5b6b375ae15b20ebfb3b136723f7c728587fd5962a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:30:41Z), 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/QZK6J2575965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56da0087e07fa99d0fe9f257944808acdd602d04b73ed28d18658589e2f581a. 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/QZK6J2575966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad584f3ab2fedb4a4c6f02cdb39140069b9dea686e16f2307143c794074697f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:51Z), 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/QZK6J2575967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7ffb3cbfc07aebee774281bca8e60a8ed7931bae4960454d804f12918ff34. 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/QZHN72037939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf447fc66bebd38fbbef8c66f598f71a47ef7dd5d24c6589c2e03574453ff8227. 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/QZNWT2447369.