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 0x3f196a380922a60ad89a09eebe07accf6b1a54cdb8fdabd98910b620c220a633. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57a6ea39-a5d6-41fc-bfee-f7b10bd80d2b.json and https://artists.proofprofile.net/proofs/artist/57a6ea39-a5d6-41fc-bfee-f7b10bd80d2b.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 0x6af57803e6e214012424e12fde2b3c8c32117c9709346c1a8eb76bf6fd2efa08. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RSA221601696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1c927a1a2ece62c52b199a82a68e8d555092ad2be8fbbc8ef694faf04f4b5c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RSA221601697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa77231d9f187e13fda0d67fa442ef77b279cea0ff33651e40d0e32a508049. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:23Z), 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/RSA221601698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe45315926a0f8239deecda08a26a11bf9a23a63f242b9ff37319c227a660c8. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/RSA221601699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f8d72c7961fcb1af5d1cf8109d9ee895f90aea044b347f1adf98dacf69869. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RSA221601701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18f2e678ddea999bc29427411376acfcb0547352390e363cfce4906b953d58e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RSA221601703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f2a3a60522b6b0dfba2d73ecf6e58935342e09b1fe19f7c15eeb630ffc6e3. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/RSA221601708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c203a4cf6c43464c54305db4dd61b1c95ba30361b876e7eef98c30a95e48ed. 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/RSA221601710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0187f5b6a0ff15e817ad83805731feef79447ed515206d9a119ff87910929322. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RSA221601711.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbbe06ecf4ae8d86384dc71f69cf1348df956233ed9975287c2a4a9b8132fc2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RSA221601712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533783a730c12ff1cf0aff879ba8eea4756bfce7ae180ec22a06be590dacc755. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/RSA221601714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bc94783a5dcc3b2a62a84b93e5c413fb93d62da0bd9b0d7a2c973a9851b9d4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:00Z), 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/RSA221991524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3da9f9906746e8e684ae367232342852031e8dfc066f01cd60cedf2417e1ea2. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/RSA221991526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e688ab97311574e855cf54afbd99cebaa9638dbc0f312b7ff19d0243c417a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:10:43Z), 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/RSA221991527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494df12b91edcafdaaaedf972c9b8f2c265f09665ab4a54086314ce2331b95e2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RSA221991529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8a207b872436e2e03e50dcc8d7c39a9afd085075eed993903f68c7deea2dd1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/RSA221991531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1df9eedeb51392845561e741b4e4779d60cc55918c24fe73649792fa446bc8b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RSA221991532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba31ead2600d6e00b21e1ceeec26a0cc6396c276324e16ba419055985714ce2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/RSA221991535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159225ea656a163bf2d794b00e21762fae45f7c1fc0d8d2ca8975e4160521e1. 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/RSA221991536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b627ffa4e242034041633ac03353bd75f9db6b423de96d6eecfdb68214c481f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:27Z), 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/RSA222010488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6525baba3382ad8f958458ef2e1f914f6ab03e62dcab93e64b67b9bf4e277ba. 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/RSA221601925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f82beb0f242abd945462f10b89c59ae8a48b3b394edfe8da82da3753f088b5. 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/RSA221991453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913e23db76f23fdc923a5ebafb8cab60830d8dae5b94050f727dcb39bddb6b02. 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/RSA222010573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af8142889aad898e01e881eba99c8f9314c7e4721e6bcfea689c89d0cf0539. 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/RSA221991661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9695b00cf48d865eb125f1d64587a6128411cf5c8ea6dcc1771485cfd9ef7a1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/RSA221601970.
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