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 0x415bb77a059d6361bf39e3f347b32e7684eba0f3e83b48c78a144854e7fbd611. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b3a8ec5-66e8-4bd8-a682-47d47c0ba55a.json and https://artists.proofprofile.net/proofs/artist/0b3a8ec5-66e8-4bd8-a682-47d47c0ba55a.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 0x4ebe0b4349ab7397cc3f70434f8a559a9e58a7f9515d10ab9e1c400307ffa1bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA092224431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af99f5e4117c733761b7a47c4d6816b2ca684adeb13d55460d63e30402fb3f3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DGA092224432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd11c728152b2e3cabfceb85b8d18f4fd6fe721ff28e121e90cc96a6fbdd304. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX872272167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618ba2cde882fb69f18eaca2565c29dc6d15a342cb5fc646c7ab22283fd477a. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:53Z), 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/FR10S2387666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2041596b36fd7230d529a212c4b85a241333a57d519296c6f2f608d9ca6ee. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:38Z), 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/FR10S2387677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f33a637d39f03faea4358cd697d1a39de46493ab8ad52f6423d5a32c20401. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282372720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d3969571245012dfd9ca5799b6472a0d4163da577b8c89e68f52450b85aea6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZPJ32312327.