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 0x7fadaa1f8a72f2efe2b0fb745d9dae514c5ee944471905897960625ec91df05a. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bb5235b-418c-4829-9a36-8fec73efa8b5.json and https://artists.proofprofile.net/proofs/artist/9bb5235b-418c-4829-9a36-8fec73efa8b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Klingende Toleranz (Rekonstruktion eines Synagogenkonzertes aus Leipzig von 1926)
Frohlocket ihr Völker auf Erden, Op. 79, No. 1
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 0x4f1e53ea41324c792b4523fb8e5c0f40ac4f4cff06a69c5d0b6479765c14c21f. 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/DEE472400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38616b0b5c5354bc3ece8f4ec566083d1a9754ad5539b3ad6cba007697d01fb1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE472400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413bcbff89fe811b739ca426832e93c9d1cf4128619fea40a56081800c55f71. 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/DEE472400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f42d9c939fff01b84d7d8c1f75928c1769866c578f6f98e7aa7ba4c02b194ac. 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/DEE472400545.
Mass No. 2 in A-Flat Major, Op. 29: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5682e83280d743d2a6fdc42a6279b8bdc395adc789c395a372fd9e85105985a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEE472400546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28f17c38162d9f2be701e4005d9be5390b37e9b28d7cd3b9b6cf645351116e. 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/DEE472400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c81165e1575b2f125771312e51288013c4158dab922a1496c7e16906b0a3d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542154188.
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
O Heiland reiß die Himmel auf, Op. 74, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63acc7fd98c0e5121c88fe5bc286398dd6a168da1317765be4642a37c61afe30. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEE472400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d61b17965dc3d54cde5de2faf18163051d3d62e89d045c877b5c8302042937d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEE472400548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedefd3ebe68209f9fbf8eedfe0faed2922a5dd6b9df87071142427e27bbe10d8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEE472400558.