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 0x616f3f0476eee1ab1c91bab59c9edfbd6169f86d46e89425b720ad07b5d1179d. 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/652add1b-169d-4901-9e61-5d2a5ba2726c.json and https://artists.proofprofile.net/proofs/artist/652add1b-169d-4901-9e61-5d2a5ba2726c.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 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 0x1c6cb7458c17fa6ea9abc13212e966f7733619141e2bd5258144b9df26bb2438. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US25X2201825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca2625ba464c45dce0ed6d25c98e3814942636e3008271cc89d0dea22bc8a27. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US25X2201826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbf20584c5fa1038cfe1abef5cac223ee2ee2064fcbd344bfc164aece62033e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US25X2201830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803da830d913522751d60cff972b0666e4a5d0cbbb5c30592c603bceb6c6850. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLRD52118008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31879df03f53cebd4786dee9ac6014bb11f45134d5355b6ec464698337e753a0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/NLRD52133317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffbcc171c342b8ba63d4eefb8b583d03b308b9652aa2da1a2d3c17b27ba7f3c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA72393716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30296706591d9a87b2aa88276e50d89972ffde224bb01c716fa253b7b154c0ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2323190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78918b692072089d3ed1b5335b516a0f2d204a7acb719c74433c249c7d9bc4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMF2375220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018762945b4dc54d20648a7010fabbdf3d529f03107fc265f8ff2f5bb4d177c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2427847.
I was an extra in my own movie and I haven't been the same since
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6047ac11f2fefd16b69bebf0c411fc72e1bb8114d47026f0caa646057b5c3e38. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMDA62458610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e4be682b4a3e914f6e556aafb1299b41665bad3dbb69c3614bac5f64386084. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMDA62458618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128d101a611003a7f7a6e202bb5248a743c569356a64c8a4225a745242ee9c45. 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/FRX202388454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128d101a611003a7f7a6e202bb5248a743c569356a64c8a4225a745242ee9c45. 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/FRX202388454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4522acc8f6732e4c8675e82579dc07ce51a3ffe78ac428a3ae364d610a97ed39. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UK9AV2300909.