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 0x6281d4c5c48a60256862b82564d98ad6992b3b3fb1bf980b81df9ae5110c82b6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdfb650d-34ff-4dcb-a919-44a3c8a010e7.json and https://artists.proofprofile.net/proofs/artist/fdfb650d-34ff-4dcb-a919-44a3c8a010e7.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 0x65d46c60f3598fe2915f2d264e500f14d3534c097e3424c86e6e26608921d300. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:31:59Z), 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/QZK6K2444867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab660e96eae067677f3a81c3e9db251f01a596964ef3b79df24f37060c741b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAU2479869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcdea05e0dd72a88627517501617a0f5e9a9aad7c2e69d22cc1723405e3485d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBB2426587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f441ee7a39506af52f977e5394c506ea969908f077f0d4284716009c8eb51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7T2485091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89a4feb47067912f323f05b535ac9a2c01ece8f4b3725db66fd332ae31c9c0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:49Z), 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/QZES92583092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb4666f47e4270c5a6766f072b56bf884b197debe8355592fc9bc2aeb4868d1. 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/QZTB92592177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab77f1c28c09ec6635803b79c9db8ecb83b2af128f9f348267d6e55ab1a5e545. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AEA3A2045212.