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 0x65d47dee41712cd2363a4b6dcdc158a397ffc7301d1ebc2a3eafa715e316ab87. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e42d230-d8b2-44ec-9377-79c3ab349047.json and https://artists.proofprofile.net/proofs/artist/6e42d230-d8b2-44ec-9377-79c3ab349047.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 0xf0aa1cb3dcc7f8b8335842ce47d48f587da1df3ebf616a678544f5a7a321dd30. 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/PLC270800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda81c34654342ec2f7571638a83e868be898c6827f2cea359dc9a6cbaf1c7876. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC270800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c921e9c1b496f97f938861ea2ec9516096023e11c8514b9e764c046a9a48398. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX282120451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfa3447e52dc5766f3d3394846d3db812376ac3dbdaf86fc03c86ca23a414f1. 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/PLC270800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73a420690c90e0c1d9679aea8d381893a164a29b05e4b845fcc22c0bd95e970. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLA550900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a6b50cec16986de3b77526173a0d3556da8b052b57827623ac5b4b622d010. 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/PLA550900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e9eb1ab45c217ad479a053f6974fe5a9d50429e8f8fb39d903b8d4218c176. 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/PLA550900096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b6ebbc4065ffd002c8d61e952402d0807e9bd8192c884edd67f54476b5b762. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLA550900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3bb5c318a2c64af6febab4dec06e3cc22381fa7effed11fbc1da5a21e8c74. 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/PLA550900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38111248c4fc4332d670b283b21db0d73b03c742ec3c7db2c278bf8ab7fc204c. 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/PLA550900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f3cbab65ba71207f73e16001fb8d2d73db36e9d3695c15cb2430b90b7023f1. 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/PLA550900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e228b7e21e3db2ab75cedc359cdf50f54d88ebea87bb22394940f2c24b4d81b. 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/PLA550900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c1fdaf75286a045aa835137cc76d05873da689277688a3ca8a4f18138c0849. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA550900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b10d37d1733ad5377985806cb8bd48ef55c4f99733ed18b8b551690bdcd9e. 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/FR2X41470878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32362a39a375f55f70b12febfa5ec7ae2f37f3ad6383735d41042ecd9391df. 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/PLA802225202.