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 0x682ae2c30d20e4b094ceaa8ae0e6e6fa6f5e34563763e3fd1140cc9b90dbb89b. 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/d3103442-22cb-413b-b1de-e92ccced1b31.json and https://artists.proofprofile.net/proofs/artist/d3103442-22cb-413b-b1de-e92ccced1b31.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0f71548f54b9ada55531f5aa1e9249cffa05efdfc56f00c85f439b18becb25c0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZES62080490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92df1df3e6c4ca9e64044d8fb124a16af3685ebbdd0d99a1cc8487fce00a0a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:07:38Z), 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/QZES92159804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92df1df3e6c4ca9e64044d8fb124a16af3685ebbdd0d99a1cc8487fce00a0a. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZES92159804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71548f54b9ada55531f5aa1e9249cffa05efdfc56f00c85f439b18becb25c0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:54:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62080490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a2c93b9b1a2ddfbd85a9aa158c62ba16128beaa5f5c3d9d0bfe1e5cfdbcd92. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:01Z), 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/QZK6F2238290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cec7a8b5f9d88b77f995a1d4aea3619b5e4cfc27f1e7989d7a8a4c900e5dc8c. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZK6P2294613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c802ab761d96d1685c10c5c67d6a729fb592adec59af994d563da0d799879. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:05Z), 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/QZNWT2297188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a2c93b9b1a2ddfbd85a9aa158c62ba16128beaa5f5c3d9d0bfe1e5cfdbcd92. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:03:36Z), 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/QZK6F2238290.