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 0xc0627d88a8c63600511edbe85d82576afd70fa76b7a7d87f478384df60345a1c. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17aa6e99-d593-4d20-a981-a192de91d1d8.json and https://artists.proofprofile.net/proofs/artist/17aa6e99-d593-4d20-a981-a192de91d1d8.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 0x689bb2d6047447e6fd990e1e832607d48b315268fa58b295218790c81cf96cfe. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBSMU3484012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d9030560538651c78556f154ddf804d02bc6e885c6600681eca2c10144a8a2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:40Z), 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/GBSMU6569275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d71817a4cf911648ef0dd21565aa27e0db10fc39b76f3340531058b0531c8f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBSMU6569276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5035bc297783c088dab28a144e13fe09f2e3cabe8f920f9e8cb9ab31c138b96e. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:28:18Z), 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/GBSMU6569277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584381d4289454c7f945671ef0648d7eb76e1716f8c739340470d3855de4900. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBSMU6569278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26be62bd15b0ef93625b5ed673e3d35e2536428999bff63e18db2cff1e52d35. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:14:58Z), 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/GX38U2285751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba3078f90a6064ad01049374ef29fa16a0e65b4428b58a845a61699bd0c91a. 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/GX3HH2361910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c759f69036416e1b7307976593b47ad2761367441b13cefd3a3a6e42029321. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX89G2497185.