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 0x8cebffa373db4fb6a20467c1076dbaeaa160bbfa981d7ac523c00f80ad7b4941. 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/4163ff9e-c21f-4ef2-8c42-2e684f76ad94.json and https://artists.proofprofile.net/proofs/artist/4163ff9e-c21f-4ef2-8c42-2e684f76ad94.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 0x694f95bc15137ddda69c38dd9649420423aa38e088420f0c58d8c4c741fe131f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2219431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84558e00046940dceca66274f8a1660c6fef8134fdba1ba5e8a2c7856719c63e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:56Z), 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/CA5KR2219437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a041e63c2d8a85d0eb50816da12e3c2ea2e3586700e7d328c4710ac5cf4f3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/CA5KR2219438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f979c6ce621f378cfa79ba0397e17f05d7afc68d7453c89026cea736906150. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2248103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc692a3bcb5aa323084fdddc8ce12c261f04f927b6b4b4f610323115f4571ca9f. 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/CA5KR2248106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a8c54ec002164856f2f1a0c7d031c2906900e53b34a0f7b45df23b1f6b35ef. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:25Z), 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/CA5KR2403302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c79fc827edc60478ab12a50c3cb2fed87b5da6a14e953cce96cbe6678404e. 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/MXA3V2417836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc478ec60e701140ab6904f530eca88568981095066a2e901de3660bac4052fed. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:01:16Z), 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/MXA3V2420792.