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 0xd7906e74f80cff7219cf4316d1bf00c75b46342c02b26027350b9b9439c02e17. 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/4e7136d7-5a29-4005-9124-8ae08788437f.json and https://artists.proofprofile.net/proofs/artist/4e7136d7-5a29-4005-9124-8ae08788437f.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 0xbcb315e0c0c41695162d472704092ba1eef837c5616dfa6a6d34d5c12477f1a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0R2319542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce983b8d4ea99fee5982a0498c40ad54476bc42870f8926b80e23c0fffa16f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42495320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb316372f001d37d129c56805ddb68fe1e999301b1846e49066fdfaeb603af31d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:23:59Z), 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/TCAID2475766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540aec28e82859811fa92986f13cacf54a3067468d454521dd29415b9570af2. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:05:43Z), 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/SGW502498457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c46c63cb7a70f5215cf57f7085dad3ec91edcd0b7e833fc73d1fccfed34fe. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT65X2566372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9073be2d37fccfcec35ac8314db15984f29db4d60a99d41f29fe59614b5ba195. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA3A2368229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d21db762e0e122c49112adabcf54d83d029e6e9dfb804ec5c650fe59d7f29a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAIT2418108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702d2b7c842973704ef816997405baff75f71aaac88dadec26c038d1f55c25d3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAIW2442575.