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 0x93176b65acf53fbac3f78a8e93752e48da3b54d60c6b7c2cd8f989dd58941e46. 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/b48fbb9d-e16f-4fa8-907b-36b1e8aa7e4c.json and https://artists.proofprofile.net/proofs/artist/b48fbb9d-e16f-4fa8-907b-36b1e8aa7e4c.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 0xd04ebd18e89d39612d6d36c03b2f7a22b514183bea2d703ba036883b997f4eb3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:35Z), 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/QZDA72263536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7711544c00240a8c113616f2ab543fdaedc70fa65a1ebcc555dabe125d141d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:39Z), 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/QZDA72263542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328fd4d551b2e6a6e754a1ab1805d70db356f1cedad9494cecf04471246c4747. 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/QZHN62374163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66640d5924100b9a7183d5fd1b8adea14cc5a7337e51e79860728ac37c982346. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:26Z), 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/QZK6H2339723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef7e3267ba23c18e754c0f1a43bad0ed3405da12d2675b01c96ec070bbc1007. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZES92503301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1048ba47bb669c89e251d3b183ee8b68b0a4dba5f395a59d20d645b912117. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFG2564247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea28522344219cc0b43a5daaba365bb13964825facac2b78ae8a5f76b126b8e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3F62581274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53282c7bd367ea920c389092505b8bd006df5d603014bc0fe60354422d2162c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3F62578071.