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 0x1599d9e1777f6f0847c772c062f55d52c4be8cac6a278b09362db42684cb5e3c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d87bd34b-6568-4bb3-a5b1-6f4ed3209794.json and https://artists.proofprofile.net/proofs/artist/d87bd34b-6568-4bb3-a5b1-6f4ed3209794.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 0xc580e90af82a1fb99d19bd62fb2986581862f4adcd02124da1da36b45b4ec584. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPE1670026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76f45583e8f6423308179689d8d239d8fa56bc4b15973c6d6e42f5a633692d5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:40:49Z), 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/TCJPL2012465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5fc23e7f082e9bd7bb06f4aecb1582ca15a6585cc87a0b1d6f0b4088c843ec. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:29Z), 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/TCJPP2180726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dee1d85b47dab3f328c109c3b6df8708c6dd03a1540d9d6a2489ad9da31802d. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:54Z), 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/TCJPS2253964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301a623f98ba46f0004551ff5521b4ff981a5885e0d5815409b024d7130c5a6c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPZ2421036.