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 0x35ece6e43e92beef6f1dd34be529b403d09c1fd678a8b0c5d930602fc69f237a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b5b22f-57ef-440c-b4d5-cf0a8bc5f021.json and https://artists.proofprofile.net/proofs/artist/30b5b22f-57ef-440c-b4d5-cf0a8bc5f021.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 0xf17b50cafe69b7a6688d04b54a2d232046d7f2ccdc4bc6bf2a0eaf13eebe16b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLCK42211089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cedcf73f4cec3ff05ada334ec41b2a77c0c4215421c13df7665d5171713e4e3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLCK42230937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b74569a767c06483186887415afec9fa9089031a1d8ea0d3a21e51ce91d297. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLCK42235980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1bdce7d271c4fc13cf7b4310cffb37619b703d4210376ead3df05a8f8b448c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:16Z), 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/NLRD52355099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644a7d3987dc35854717c5932b3a803a70a08a2c91adb0f19c34a187155df524. 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/NLRD52355108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e8366e2891684d2a2c4e58b6e47ae0fc909824513f368bf50cdb90dad1c66. 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/NLCK42403388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d6fe7a7602903c73a3da7ce3a2cbb9a598162cf7ec6a9935303c24a1c07c4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLRD52413840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b74569a767c06483186887415afec9fa9089031a1d8ea0d3a21e51ce91d297. 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/NLCK42235980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a515bbe31b7eadae70081b5d9f7725f5909455856e3c3bacc4c2645b94eebb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL3M12412425.