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 0xeba58c1b4caf38ed037e8f16664be9496015c236e24edc48d273d4ea53d4cf7e. 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/83a352a5-8a11-4d10-8653-a5b90e6021b2.json and https://artists.proofprofile.net/proofs/artist/83a352a5-8a11-4d10-8653-a5b90e6021b2.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 0x851f3c5cee46aa9b5905935398b8b3fd9ca602c785530df03e52554172cb5533. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZES62173603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353f0f8cae21f7efc1d4e9aaed1b4ac5da12b943bd902cd9671e581afe46a33. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:46Z), 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/QZNWT2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dda464699fbe1a93e45a8336045e9c8a0054e3c9c5cc21321f36f3af80f935. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHN62359002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8998866edd4869bf0761d9c3b28ed8af6df816bc8f5ca63f494374d8869380. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWW2369898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d136eb748d8e1a32593cb39905964ff7f29c4152b433b73dd7b34e377f2d3d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:15Z), 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/QZNWY2437391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa614b22d3e6b6ca4a5fee692b2eece652bb5e25c939fc351ac95f85d30ff4e83. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:32Z), 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/QZZ7T2453304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae29344b4dd80355a36bc2f3aa3df75231adacddfc7cc11c480d00a24b4083. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QT3F32408599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b940e8bb3158aba094738cd9def3fb2290ba82edee5b938bc9a0a11db1cf73. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3FH2572154.