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 0x76957ba516719719b12d306e926298368ad0ac547406fc9788fdd4b1a124ac6d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00b35517-7cd5-4db3-99bc-41748367d4d2.json and https://artists.proofprofile.net/proofs/artist/00b35517-7cd5-4db3-99bc-41748367d4d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
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 0x5a7289af3bd1a1a5b487b4f0ec842b2d4a57d1f861cf11e718e2e7584d6bb63b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEP621800016.
Classical Music Essentials - Best of Orchestral and Piano Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7289af3bd1a1a5b487b4f0ec842b2d4a57d1f861cf11e718e2e7584d6bb63b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEP621800016.
Liebestraum No. 3 in A-Flat Major, Op. 62, No. 3, S. 541, No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc377cc982a47e813b4f509e256048a06582951cc65ed4b1869d8f38911f306. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEE479700013.
Flute Sonata No. 2, BWV 1031: II. Siciliano (Arr. for Piano)
Ich mag keine Klassik, aber das gefällt mir! Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d4010b7396b8322839e19ee0aed6c4a5141c234c9e6067be537711a4b29243. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEE479700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e3d3a847becd508b32c2ab81a3bca4f782bc3c606c405b93bbcd462d9c085a. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEE479700018.
Bagatelle in A Minor, WoO 59, "Albumblatt für Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf28a51fd52796532ae3a9ac085fb9c91df3ee351f175178a3c8a4c858f42835. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEE479700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc377cc982a47e813b4f509e256048a06582951cc65ed4b1869d8f38911f306. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEE479700013.