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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b8a243aac78a6e74364be6099a61fd929444164ceef5763c92b0ec90f5f8e9. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a394203-bf9d-4436-9c96-448f690187f1.json and https://artists.proofprofile.net/proofs/artist/6a394203-bf9d-4436-9c96-448f690187f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Caprice No. 24 in A Minor Piano - Tribute to Paganini
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe379591dd44d96b2caae2c6c0a1a0ce4f2e15268dfd9653d3cbf9888fd2b70f3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZGWX2158167.
Enjoy The Silence Piano Cover Tribute to Depeche Mode
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49349041fc4cbfc60c9cecbf1aeb40a8734ee0b58c545b5d23c77111a1b71c8. 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/QZGWX2158168.
The Lonely Man Piano Cover (from "The Incredible Hulk")
Right Here Right Now Piano Cover Tribute to Fatboy Slim
Ancient Stones Piano Cover (from "Skyrim")
Quand je bois du vin clairet Piano Cover (French medieval wine song)
Dies Irae Mozart Requiem in D minor, K. 626: IIIa. Piano Version
Mozart Symphony No. 25 Piano Cover K.183. 1. Alegro con brio
When Johnny Comes Marching Home Piano Cover