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 0xb0ba35f7e8a719899e7e11b16946d30c78899674500c8294c406642a956a0a3c. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ba71e67-f3ad-4f5b-8df8-08c3d65bb1cd.json and https://artists.proofprofile.net/proofs/artist/1ba71e67-f3ad-4f5b-8df8-08c3d65bb1cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rautavaara : Cantus Arcticus: Melancholy (Melankolia)
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 0xb83fa708eb2b6240ba302764494d0e2b1ccbabc35c26b408279e8f9d2fc19c7c. 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/FIFIN0100044.
Melartin : Prinsessa Ruusunen [Sleeping Beauty Suite] Op. 22 : III Butterfly Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dfc6a043b074062b4bed68cee31d10e65ca79bc90d779236fbe0f50be03d1a. 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/FIFIN0100047.
Melartin : Prinsessa Ruusunen [Sleeping Beauty Suite] Op.22 : Festive March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fa7f735e365b98cb3e3c88fecc2e5456799cb86e324b317289c5203609651. 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/FIFIN0100048.
Kuula : Häämarssi Op.3 No.2 [Wedding March]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054299dcb5f53ef75e04e5d3387933ab81e4cdcff92ab4e972303d63a20dcdb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FIFIN0100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620436d84476475d440fef01d734c1331cd4681a397e3744893b352882d85664. 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/FIFIN0100051.