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 0x283e06df293f8cc11cf8727b5bc27dac1d5ca654aaba97933828cdc8f5b425d0. 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/dd12968d-b65c-4a3f-a1ed-f6ff82e9b3ba.json and https://artists.proofprofile.net/proofs/artist/dd12968d-b65c-4a3f-a1ed-f6ff82e9b3ba.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 0xd4668acbfc6725b74f22bad1b6466831ce2bde0ec035ca4d0219ab0ed6d97a8a. 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/USDY42041943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d53f3892940d673862b5f040afc8db2786c036ff213d474e9b29b3763b26a28. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:16Z), 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/USL4Q2005467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422cc4de37268c23cc35409bcaf5e9aab850c45bde5ca153315f1f8002742df0. 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/USX9P2024310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6998d10d732eb8b1ba4b553a8948bbb42e49d1a02f97dbfa7780e77986036a2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q2193942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef8112245056808d28e02b5efa0c69f935dcc4ea2c2475a759fb8e01597582. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM92217796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c89dd20875ad56e704d4274f071576493a8c765fb2543b9d53d07aa968aa34. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:05Z), 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/USDY42489936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f006e29dc58288c1514d75d5b9635f67cd70b254cb0c9da804a1437e50cfc46. 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/USDY42489937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d6c00ec44cd14783d2a763ab2bd3861090dc1e6eed67614f6ebab049fc06a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:47Z), 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/USHM92436037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c91654bd152877f90d3744e8c474b539c5d3444ce285c6d6e359682b58613. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USL4R2546940.