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 0x2b636983b7a2014e83a15d914ba1bccb5f788a8f50cb10ac2ab2a73e0913494d. 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/413142fd-11d4-4eba-8698-6c4d5967d2cb.json and https://artists.proofprofile.net/proofs/artist/413142fd-11d4-4eba-8698-6c4d5967d2cb.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 0xadff35c25bfc13669e38d6dbea02c2952a2864d24b144aa320052a3220535dd5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2471595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51efb6f27007a57d61ed604ab47b0ca20ea3c710753b54b6337b41a56bfdb986. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2446228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178a33f81eb5b9d67cfdf427b6dc2e6f9fcc2a1dff60bfbb65a0a3d79e59675. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2446227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07779d1c2c65718255b9acae27f3d5378aec8edf442e71792905a1832a8d4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2380824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b22a1ae6aa7389b53deb82db429007a22459d2567437c97fce318902fee1a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2364089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6d17652d597e138f7d31267b1e2678ece80d02c3998fd9a01fe34c858de9f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2364090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a7457b9ad424068cd9233fa2a6e534441c5903f4280f116f33f1d50f436dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee8314f7352870b27d6cc90501bd57b5b1c3b26abd4c250e091158e2f8026d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2278179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5a52e80d810000bdda30e0874e7ee973f7567a5edc1a0329ea0e80e2965d0a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2272784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef3ca55258311c7ccf00733c5a0f7db9c36f09cd83b5dc01936506f8556021. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2257098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc45382f8b64513e36f0b05eac94a88dc8bde8011631718c36fec6df939a91f6. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBKQU2257099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe25ce4aad8f65d7717b47a3adbff6e6d6de136ece8d0f0833dded97107685. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2237946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b57cab1b60950eaadc1bc8ce777abd643540c02073453c0da879e39791bfb0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2212962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39396a8e98f7d7350de9b8f6082eea52e94bc923831b62a5f8e016714b2bb9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBLV62133850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c061cfcec4bbd4398ea80d004438b1c9b689f550143ce9ac1132a3d9bd964f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2102848.