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 0x1f1371cd49706633fc9ca07593ad634e8ea83423d424a5786fe1a88cc7a6b7fc. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88f9ff64-5201-4d05-ae76-6992cd1e52ec.json and https://artists.proofprofile.net/proofs/artist/88f9ff64-5201-4d05-ae76-6992cd1e52ec.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 0x02433cf20ead079bc1b2a069282837afffba37b08bde5a5e9d3fe656736dfdd7. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBLFP2277789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e0b001a814710fc6a9b896e6a62afc29dd8ed24c20a86ba1e919dd26d805c0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:26Z), 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/UKXN22201449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66663924f61df704faa70c63d6291f997e0fd5280c6b6760fc530cdf60472bf9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:13Z), 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/GBLFP2352465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2bc66cba0c4252c14d23c7fb50456ff68ed0dce3a952e925f2a9300bf60a1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2345109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b49b4987ac30d2ee49e54d14557793c1aa7f32b8dae54af96d2884afd735b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX53U2371145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1800bde20f4aaec750297fb36331e5ff540fe5d67f5cdfe788c1734606135ff4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:23Z), 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/GX53U2371144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74abfc3941261a10de81aecb936d4a45e1dc90151813157355260b5d69c89f54. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:03:27Z), 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/GBMA22484023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d7d1a684a335b2c30cd84d4286b6b75a0a9ebf8a784cbd1a69d95cb1545e5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBMA22411830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66663924f61df704faa70c63d6291f997e0fd5280c6b6760fc530cdf60472bf9. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBLFP2352465.