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 0x1e830d00063ee3bdf177417e152b9e6bbc6d631f3b9554a3c266f04c82c17689. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6ec2d5a-5e74-4ea1-9623-cd48296d0493.json and https://artists.proofprofile.net/proofs/artist/b6ec2d5a-5e74-4ea1-9623-cd48296d0493.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 0x8b245fb9a012eb447f614cc824812600b856670afa6fd3bf76e6ff18e794713b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLPF6732972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c538473119f6c5287439730e1d2453cde99530a7d556e71f32a671366b8396. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBLPF6732973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54686f8bb153650f4e02f1794b4e3c7ce2455b8db193103f0c58b67c497b93. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:41Z), 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/GBLPF6732997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4237cc23e1c803f6491873c9740f38d3bdb355e9f0dc7df9323c5a843d2653. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLPF6732999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e8b9ef3a2ab86ca5a1a85e307cf49484c6ff35f10285f5d27e210b250b6bc7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF6733000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d142424440c87b2869c3c68e910c5ebcae802dda8cd8772b7bba88fe42c34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLPF6734248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156bf1b46461edf0e4f1408af018a6dc1cd5394c061a6bffab4907f95351793f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:45Z), 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/GBLPF6734249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9adf2bc8aa88ab66f1a221590ca50fc8389b6ed61a999c4070a61422f8dda. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:05:48Z), 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/GBLPF6734252.