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 0xd39903d787da488ded994390b17c213a3adb3ee6a189bb7ca13f1ffd81d52b04. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8da47a25-232c-45f0-ad0a-2e42c4bddd24.json and https://artists.proofprofile.net/proofs/artist/8da47a25-232c-45f0-ad0a-2e42c4bddd24.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 0x8a3e9bb68161dfe4e9e087f29abf465a27aeac4a20d96eac990c99a48d9db749. 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/QZES62246049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15beaf7717af826ea55c6c71612f8b60e5de30352be5dfd52d1633e1eb4ca942. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWU2472728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebb2cb3d51f6997d1d3a6558822ecc221337f4b544a5dbe9e1f3289a415b882. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA52540431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542ba8db220ba432bce19118450c114034181de8b356845686e441476090857. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6J2549508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64210d804c65bddb169cec8cd48e9e79428363f6897046d8bbc9982be0078184. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:07Z), 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/QZRP52547378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebb2cb3d51f6997d1d3a6558822ecc221337f4b544a5dbe9e1f3289a415b882. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52540431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23890eaebb2144354713a53d08f674b1afbefcfa691b09b19585345c0ab7dd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:12Z), 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/QZRP52547379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1542ba8db220ba432bce19118450c114034181de8b356845686e441476090857. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2549508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15beaf7717af826ea55c6c71612f8b60e5de30352be5dfd52d1633e1eb4ca942. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWU2472728.