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 0xee6b2e1572025a670134a28bbf6f3d0e0724d9a48265258a901dda494f9db905. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f94f1446-c9dd-48ce-b473-7cf05fe01fc6.json and https://artists.proofprofile.net/proofs/artist/f94f1446-c9dd-48ce-b473-7cf05fe01fc6.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 0x0764d196b66606e3465c806f16627798a66808ef70cfac33dd6a1846bc6d6384. 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/QM6P41790335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0750e6052f5d7ab746fd6c9fa406c73d3c7d7426eb36e12688a871339f8e3. 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/QM6P41790336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa445820cbba9d1d353fb85b5d05d88d781dd052c4ca2217ff92b77c05dd51380. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:26:51Z), 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/QM6P41790337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbcebc6fd0ff4e7faab9908fe0aacf060badd658daf395adb6ef68dbae15261. 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/QM6P41790338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e18830cff89560e8d2e482f903a5518d502f83c90b5ff5e19dde7764f2ee2d. 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/QM6P41790339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbb10879d36d5db06986c34228739723ecf59d7397c815e4398778049879544. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QM6P41790340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dfad29903cf6f5fc81a36f7ec1a707893f80f8e726b057b26b33df5f59e504. 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/QM6P41790341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b0e496a141cee02a4f55f87dbe3fba41e76f23350ca830c88a961622cb4f21. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:49Z), 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/QM6P41790342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb41a194830aa3be8052ade983ffe54d92385fd129d5bbd5973e58786dbcb7f. 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/QM6P41790343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919748a0338cbe0189bd37ad2ef3dc75d2d943dfd475790596990b511e0e0c4. 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/QM6P41790344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37424c5707384ce35e85d5a33495ef7268ca97e95bee7f84f7ae27ed9b8cb16f. 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/QM6P41790345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ec894061d6ff1891aa4c6cdc59cc294a9cef8a38a1dc35fd95d4466eb39f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:08:11Z), 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/QM6P41790346.