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 0x463965bd29ba7b594462734f432d5a91beafe60fa00769a34795855619e92009. 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/d04d01dd-fa15-481f-8a21-5b9d93cbd1ce.json and https://artists.proofprofile.net/proofs/artist/d04d01dd-fa15-481f-8a21-5b9d93cbd1ce.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 0x0d3fb4cf0336affe3d74530af707a77c41284c4543fab221292feacc63738322. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:20Z), 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/QZWV32464883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25d239b040fb616530c296de9f3ca840f6ad59546af084593b9695f2eaa4aab. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:33Z), 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/QZZ8A2479916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b350ccc18d4fc70127280b094fd9f7ef1d4a4adaef1c673f808e74fa309de3a. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:13:31Z), 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/QZZ8A2479920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b183dbdcad86265daeb581f30f6d89c6066b79514af80e3c9d70f50da0da279. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZZ8A2479926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a209d943bbce33f38f89332d5878a09e494b69a080b04bfe6d5b82a7f3dbadd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:20Z), 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/QZZ8A2479927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257807a0741b3e505f66da5536444980766e250ba05a17027470e24f57c0eef. 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/QZZ8A2480091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3298560ed602e706d0a869f997045f617678bdbe55346316bd53431af16542. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ8A2479981.