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 0xd003c8c0cdb69a619540a3d3793063ea824b3867c9cce4a61ca5fdb7c9cf19d1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d6644c4-9ae6-4d61-b8a9-1493809dee32.json and https://artists.proofprofile.net/proofs/artist/7d6644c4-9ae6-4d61-b8a9-1493809dee32.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 0xd5f3c802a4ad3c4e3ca279c8b48f5e53d630aaa46cbe4cd5f94569d4df84e416. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAJE2517175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5721fa0d37a2dfec1b36d59cda390199feff8b2ebd583740c09becb0b5652349. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJE2556264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4bce0bc26a862a8aaec676679998e19725ccec03df20ae107658b414958261. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAJE2556014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae94aca7d80dd409c1ddf417351cc5c28d145829ef916646396af93b779f19a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJE2556008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fa7e27655907c36f59381977a8d73fc3fc013107c07a6482c930cf7cf07d6d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:05:59Z), 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/TCAJE2556254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88761b44ddb22a8955449a8a28868a554a138d790b81bb0863bbf8a0624794d7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCAJH2594715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487df30b736e20714907d8ffec36baf7cca1a9e2dfcdccc0be54c061e33f38f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJM2508467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8aa2cbd468cc5a4cf280c207be73ed81e6d92fa2211761f35701741397855f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJM2544266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42ce2c8158d59fbf1bb7cf4910f825a2bc74f0a4924dcff2a77f0d1a4cd501. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:14Z), 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/TCAJT2541635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574f2fd22ff9d70fe6b67ad7fb711c6fb7b7e24b2e0667eac9f36f0a2f254a3b. 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/QT65X2567871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07718c7c1a7557dce93c5e361e8261848480505cd9b45b04d6c83d3ff0b826d8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT65X2567913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9cb747c44aea05799108e84ad0c8cb916a145150e3701e8ba7ab6c8d4d34d. 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/QT65Y2511620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554631303ae1451a2236843dafc79489e36618ea4c22f9387e47da00c35511ad. 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/QT65Z2586799.