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 0x8894a174835434bf1f8f971e80bfa6392fcfe5657bcd421dca1790062ecd8621. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eab4e2c-59ca-4b4b-af81-475d6510b6c4.json and https://artists.proofprofile.net/proofs/artist/2eab4e2c-59ca-4b4b-af81-475d6510b6c4.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 0x33d4960c5cbcc2cb55242e0e48d7a022b8cdcec61af9799aa72ba34a5deba52d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWV32549530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90df4cda3e5a3459dce86c0f08565f944065f51ee8c9a09bffd9e6e5f9f87b5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8A2503730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c3064aca31326dcbec424f2a1c58942f95872fa5d94264aa7147c86db2f93e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:46Z), 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/QZZ8A2506297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399fb32e4b1773e7dda4ed08112ea659e52dc8d0f4197d61a00dba5a4fc320e1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:40Z), 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/QZZ8A2568253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce3295a50318536124fa82db5f69d364f0f801e85211ac931c84c7859ab127. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:50:42Z), 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/QZZ8A2568422.