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 0xfffc491f52ff9009089587ca209cf31e4f2a9614f465b4e440866ebb0c5d9d74. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae66bbfa-d75a-4d61-8d62-412aa09f203d.json and https://artists.proofprofile.net/proofs/artist/ae66bbfa-d75a-4d61-8d62-412aa09f203d.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 0x9d4b677a2085981bfe047a818d76c072f875bd96d512ee67efcd71ce83d202ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:56Z), 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/TCAGB2209239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11187d3f9f1dbf07f932ac64d6ed74c0ea3b1bfe7da50b6fd3e2f8f287f23025. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:01Z), 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/TCAGB2209254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc4723a8ef387f42c0baf409fd9a87357dfb368241097e5ae26df9bd82d5a34. 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/TCAGB2209260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112031660fe6541323afa01ef02f0e9bd83b2e26e9e98e9b2b90d0e56796076. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:50:42Z), 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/TCAGN2233564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119aa9569d0889ac156be42bfa7188f4e1dd7f1aa857f2ce680f236f06799042. 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/TCAGN2259530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5320b18c42adf652a13d7082c6efadd0ae28e53e63c4a491c5042e7365619d3c. 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/TCAGP2209164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc61212a9add3b6ef179cdc87578b74a1c3decb46110b37395b0662db0563880. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGC2274568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36801a97183b0101e82b469c501f6964a6af46790080b8b2717a49a1a10aace. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:28Z), 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/TCAGC2274624.