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 0x5f1a51807160ae6219c596efaae6f938376deb2a747610e99c055e265c00fb39. 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/204f5cbd-11e3-46c0-8b6b-8dc14b07f257.json and https://artists.proofprofile.net/proofs/artist/204f5cbd-11e3-46c0-8b6b-8dc14b07f257.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 0x18dca76c83b631a33d7131142e26ce7ee516fb09548446df786f0cb7af72875e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:19:25Z), 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/INS4J2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c06661bd27e64a51f6a661a79e82efeca641f453b461ed9a4b000ecc31e01a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:43:16Z), 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/INS4J2000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713bed5ce39137e95b0da0f5ffdf8f485a1bb5916ece43a6564e68dbb3d1013. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/INP612100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057eda1240eec0c0bec089093c02045e7705dd76c2abed1c060cca094e4e47a8. 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/QM4TX2292115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78827ad39bcaa7f9f726011d9bf73b5b1a0183aad709fdd09eb8b950011fbfeb. 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/INS4J2500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cacf72bdf09d99c644b95f6bf50bfaaf1c1a6df40b8a999504136a49c0948a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:58:49Z), 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/QMBZ92577836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32219fc7dff9f6eb88153125b3a3a8c523ba1b15eeca5effaee302579c5176e. 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/USL4Q2203818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436c60fdd00e590761b6f463778df506dad1c84258665d79c80379039ace95e9. 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/INN242109864.