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 0x2970708b74a20035c732c6d2862d65802fce36803311138294b8c57d7b3f63cd. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3120afd-9069-4451-8772-ef6950a3d0fc.json and https://artists.proofprofile.net/proofs/artist/f3120afd-9069-4451-8772-ef6950a3d0fc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Atemlos durch die Nacht (Romantic Candlelight Piano Mix)
Acoustic Chart Hits (Ambient Piano Music)
Piano Chartbreaker (Bar and Lounge Sounds)
Top Chart Hits On Piano (Unplugged Session)
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 0x8476c2c0149261709a0f2bd6619b421bba8ff7d2ab6f81b086dd5f11069f19c7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5770605229 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72ccc1400de4a1ba7191af8cbcd8010a6d69babbd03392ab9924e0d6a215fb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5770605231 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396f2b3670b49ab07022c61681e9dad3bed1faf61d05b8d9643ecb5a19ab23d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5770605232 — a six-check JSON result.
Newman: You've Got a Friend in Me (From "Toy Story")
Gregson-Williams & Powell: Fairytale (From "Shrek")
Across the Stars (From "Star Wars: Episode II Attack of the Clones")
Pop Goes the Piano: Piano Covers of Today's Hits
Binary Sunset (From "Star Wars") [Cover]
Rossini: Call to the Cows (From "William Tell")
Schumann: The Merry Peasant (From "Album for the Young")
Alone (Tribute to Halsey ft. Big Sean, Stefflon Don)
Back To You (Tribute to Selena Gomez) [Piano Version]
Quarter Past Midnight (Tribute to Bastille) [Piano Version]
Neymar (Tribute to Capital Bra, Ufo 361) [Piano Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f5f5b5d21f3505908c810ee5347f4a43aef05f1b5caafc665778833817c87. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITA730847302 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be26e519e1e56e3be2b74c756abebd524906342cff95afbdaff9e78e11a551c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRD571700008 — a six-check JSON result.
#6 Hubert Street - Mixed - Klubhead Style
fabric presents The Martinez Brothers (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a4d6b62b7ad670b8a3e5d9382e9ab7f83d31c96c4a994a58e1b6cf8377064. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEXH1900559 — a six-check JSON result.