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 0x317a762ea61c07b2d2eb06e2017ce653d7e36647631568411646e5309648d88e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/685f5616-e910-4d2f-a16b-2a3fa154f824.json and https://artists.proofprofile.net/proofs/artist/685f5616-e910-4d2f-a16b-2a3fa154f824.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 0xb950f6e15c9923f2fecc5e50069a1a228640942dd8bbb5de0fcdd1a9ccbf93dc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97405f8749fee8b2e8d48ccf3f4dac259d2e3e577035a72949659da55ce0e295. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES72588117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee04fefbfeb55f926b33f95a440d4b70e54d1e0508599be708304e5a6fa5be30. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:36Z), 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/QZK6P2526149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b202922e4d417a2dd8a2fb06f6cc33caa8f0591978ef68b398d9c9c7839c3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:34:47Z), 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/QZTB82551334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2746c82f700fda3b798efe261814d1d539ee1da4187644270a5e7fe132dd4cbe. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:49Z), 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/QZWFN2529188.