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 0xbb4ce5f47c123853b230e5878e210c51ce5ba3d117f68d7102a10d3c1e273435. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc27a7b1-9502-472e-a9b3-4439ec3aa20b.json and https://artists.proofprofile.net/proofs/artist/bc27a7b1-9502-472e-a9b3-4439ec3aa20b.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 0x709f62e01e9cf627843e460d06681e4af50283d4d1d61db106fa4c072f41336e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:53:32Z), 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/GBLPF6810347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d433f5e61edeed0ab167a7f99d23393fd5db4b0e88444421ef38ccd0400ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEYW82501491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5830c35f0ee7a8bbb7fd43bf668cf7aec381463a75364c9115320dd78c4e71c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEYW82505071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19afaab5d1885f875f480af93babe37116e5bb41d10f47f6670ff9b49d5b9833. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEYW82505618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240fba547bdecb08da709f981f99f2d20022b02f8989d46d4dc782875d09d167. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:58:47Z), 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/DEYW82508349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf88770437d5c09f8b71cf4185234c5459fe8433392ccec630a47696e5cc9fb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB52539239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12df7ae552a628508d1525d37bfd73fd8e8b7b9dae7b12e3c709ecb05b83148d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DEYW82512588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a09c7279cd756e79d78a15f7deadf13928885b4867abfd28ab6590244a66ccb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEYW82513778.