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 0xc2954b191468c9573a4ba0e09fe422c0f6804f015c90164c4ba4644545d45ece. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a8612cf-fb73-4cde-a630-02b37dde235a.json and https://artists.proofprofile.net/proofs/artist/1a8612cf-fb73-4cde-a630-02b37dde235a.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 0xfbc4c52f28e6d3461182a6253ca22e8ebbd8f9c7ebc30f965548cb361d7383d9. 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/JPR502420309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8febf1ff1a33e6d0ab4ed9d14da02ba60da349768e644434361e0b9c182de877. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPZ922408971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f9de4444c13d239cc8dc410da4e9e43e485454a9755cca8b3129e1b51ab87. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:48Z), 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/JPZ922213513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00147359beda669fc558de8b5fb89584ca088c3f85a0a69853669e1f25d6e3f5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPZ922501770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ff03bbf80221481ed338d0b43133fd532f9aec88ede7d35e35ac470c24290a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:20Z), 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/JPZ922501772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96d461bb5a128b7fcb090efa718634174fde85da85eee5200c6f21c9c2f5e7a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPZ922501773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96d461bb5a128b7fcb090efa718634174fde85da85eee5200c6f21c9c2f5e7a. 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/JPZ922501773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e3a0f3c4045bf73f1c5d4493455bf5a2235078cc7ac8f0b3db60ebb585dec5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPZ922501136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e87f4c12aab8eecfc47d26c9ac3166273b592014d47264bffadba9854936b5. 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/JPZ922501137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece511da0231c8f5cf19b5ccb7ea4d80f399585980e407e00ce5a5a273a3762d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:55Z), 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/JPZ922506229.