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 0xdf7e5d76746f3ad5570fe181443c0ddb4a90c67d5508279301e2eb23f1e77199. 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/2f14146b-b343-4c05-8e55-224c7b9a5b6a.json and https://artists.proofprofile.net/proofs/artist/2f14146b-b343-4c05-8e55-224c7b9a5b6a.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 0x912c71a18e0c225d9c8d0e7a4115041b8f97ffc952c4fcf566c0250e2bbc6d32. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZVEM2566886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b4fd208938c5712e5d6a7566c221e16e737bd22668c85ce2a3141336a0b8f0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:05Z), 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/QZ85M1930705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309564e8b0db341b958ac9ef10909ce28c6a46b03c06c0fe52633de22ac14887. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5BU1927752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ccd3648a730957a23887c5fde51d7cb15ea5b1e0d6141d54d3c0964a7ffe6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEM2062394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e241afc76181cd2a788cd38fc71f7d5764e453c9f625da446ef7f27143659ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5751874394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffa2fa79894b05e67c2c0583e6e1575da04483a6826e066f0877e3897311b0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5751888146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffa2fa79894b05e67c2c0583e6e1575da04483a6826e066f0877e3897311b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5751888146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96c6a1d958295b3a4ee36610e2aa4363a78f606d50956bd715553d316e9576. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5BU1797867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309564e8b0db341b958ac9ef10909ce28c6a46b03c06c0fe52633de22ac14887. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5BU1927752.