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 0xdb2c61dfc0b5181287839759884d6da63e66ffaa21fceb6882d004e36e3cc9b1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d02731e6-57b4-43fe-94cf-26d1a6c8cf20.json and https://artists.proofprofile.net/proofs/artist/d02731e6-57b4-43fe-94cf-26d1a6c8cf20.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 0xf25a2d4f0c71d456ba22d65a55cc5fbd7efc6026c1c1a517e223c7cf4ebe7387. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:26Z), 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/JPPO02202929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40baeddbdfbc900e110b32d9629555546f0d64430dc2a7c4689a38f55b8eedd9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:46Z), 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/NLUW22502674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cab179e0b29ec6cb3d761a238ffbc3c3d31a8a92001798776362b580f7b707e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NL1ZN2503434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1f9cf70417e4bf9f085e7d0a3b7b549b7b58b3ceb207b6f1a2958de59541af. 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/JPB602500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5da12e0000ee928d41f6019d8f4bd5e5bbbc91b97abbc80d43fb6be389d34b2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEUD42561454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4649ab41a4e2035ec88bfd893d1aba2136b88462a70897e0cb06c6aa107eb40a. 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/JPB602501222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5cfa78e0c01aa9a669ee7a8fce56e17151a0447e9a4030769f23a3404e45e8. 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/QMDA72138054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03b52f01d55b7c1f2a6b45b5fa487f97615541889720afee0ee81f3db87e560. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CAQOI2401902.