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 0x8122852bdade0de582388336eb5682c972d8e0f95c1a5d51b72a88d644467469. 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/0b1ac154-78c8-4400-a993-a7c26f51eaf9.json and https://artists.proofprofile.net/proofs/artist/0b1ac154-78c8-4400-a993-a7c26f51eaf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
November Rain - Guns N' Roses Piano Covers
Wake Me Up When September Ends (Piano Cover)
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 0xb177227b4d382d8df696d6e1a50b32575872b77364700c2866642b5f5fcc6adb. 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/GB2CY2355447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423e70c42507d05ca7da7bceb5254436abba8ab2cf1ac5487fb8b2bb5c61286b. 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/GB2CY2355534.
Times Like These - Foo Fighters Piano Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d371208fe7b03660b2e00788fb42a90cf6d167acc1338bcd727a6f446eaf81e. 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/GB2CY2355450.
Nothing Else Matters - Metallica Piano Covers
Change (in the House of Flies) [Piano Cover]
Boulevard of Broken Dreams (Piano Cover)
Time of Your Life - Green Day Piano Covers