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 0xe375fa0d35c59661adc68e0870ef7fffaa6c49f1bd1b68f0c735860b1cc381c3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e692327a-213d-404e-98aa-3d6065f97e4c.json and https://artists.proofprofile.net/proofs/artist/e692327a-213d-404e-98aa-3d6065f97e4c.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 0x69e0c9ff195858f25f82ade956c72686d5894a515d140574f417bdd5b7a7a998. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:18Z), 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/TCJPO2106655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fc1f420263d3e13acfc3a7b68c27d57d668b953087fbc032e4755c6938be04. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:24:15Z), 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/TCJPO2119942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3f5424231e3d4f71a864e31234c2f54140428f8f5f4f928670540e115e201. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:52Z), 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/TCJPO2119945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf98de5c7d1000c38b384c9ceae6248bc0b513c428e62905d3e0560b8578bb87. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:10Z), 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/TCJPO2119959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd356c460dd205ce49896c08844cf94588fa95644b16ff829a91d486d42786e27. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCJPO2119961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb984abbbd87df3940147a23c590fc28804a5df1db8763ab77e99a0faf5389a11. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:56Z), 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/TCJPO2119965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022801f4f9dd8fc449f6931dd6d796fa5b9d39c69f0078b6d777996d7be79784. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:34:34Z), 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/TCJPO2119972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54b37e523d6412edade05a83b63c03a543c52c28f606172007399d6b28bdb4. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCJPO2119975.