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 0x07fd3959cfdde3561c2f37e5ab6653d9625ce15d2b7456d664777d82c6a888cb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/488a8b79-a658-48ed-a0f1-eab1902d3a7c.json and https://artists.proofprofile.net/proofs/artist/488a8b79-a658-48ed-a0f1-eab1902d3a7c.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 0xbf2aa4b90e9bfc894f372b1f52dd9b46dd45d177373740cfb63e746755c9b203. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IL5849808140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9d1c43cbcf2f7c87a7b2a04ce2a78dafe42ab0adac1e4d78c0e68180581b2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IL5849808144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee48699be518b0239d164595df797a7ca39c9e6b5803e95c8ae1cb1fb0d45aa4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/IL5849808145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a0c9e9eaa0e3afa192990cd90fffdb83d59c5c3dce88eaf2d91f73541b422. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:39Z), 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/IL5849808146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3274d641be0efea942614d65e96ee3790519542799b9fd6b6d39eb6b7a43b1. 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/IL5849808148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b942595f901f903813eb2605bd6d30aff2f7ca758b4db7a4c57240d4ee05f59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/IL5849808150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d12a0a7dde0b0b66d69ceac4f6a6d8cfbb56865c2a3bb30931ae959fc11610. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/IL5849808151.