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 0x5f1a24a5d7a209a94e3a4fd75ae1c4962b0ed80430146ec522f59b54a23246d4. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bbcf9e1-bc5a-489f-95e8-ac1fee0cebde.json and https://artists.proofprofile.net/proofs/artist/3bbcf9e1-bc5a-489f-95e8-ac1fee0cebde.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 0x9687d15a561809ab1523b953c03cced3f7ed7586df3787e49050dd950d799b33. 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/QZZ7W2580196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f3b4f01252fbcd53e77ca617fe60c027e5684f29ddd043a595b06ffd718c0a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7W2580197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b2bb3a8273a85b30b7e244ae4657c58448f3325c2c0563b710ea34b8709bb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ7W2580198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a83ea281f687bf38a5e878b17ec7bc182a2956bde0ffaf513cc8ab57b7c48e1. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:51Z), 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/QZZ7W2580200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb0057bff8eb5b5083d270d62be25af95eaa1b30ae34d0683f96f00471d6dd. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:07:37Z), 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/QZZ7W2580203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdcd11f84a35fcacfad2afb341caeeb4d8a7c408d938f9efba559448975d69a. 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/QZZ7W2580204.