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 0xbcae1798d9a4ace35d57b8c03a4c93df462e80691cdbb3a5e97e3d08691eb756. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d0798c0-a2f1-4e90-b599-41c4c8d23718.json and https://artists.proofprofile.net/proofs/artist/5d0798c0-a2f1-4e90-b599-41c4c8d23718.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 0xa3d5a2912a40d6f31796876e3fa044f043d707cb29dc4157f6483343068c62bc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUB161113069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f55b8b33b9ebaf8054d2367a69851334be081045d063c6911dee0ae2cdda3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:25Z), 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/HUB161113070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf896e596ea7da0788cc030274c49a58b67117e5552f8255eb59ca787489ce98f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HUB161113071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd450c4506f162070559b27fcb024978b54dff4d1a8c67b0685a8bbf2ff1cb9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUB161113072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65adbfcc42703feba7f23e016ee3cd56637cc4d9559b27146892b888455a360a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HUB161113073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d9e9313a7601214bb82118eb7c1629fa34cfd22e1ede861a5c9cf059ee0af. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/HUB161113078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22df38d17912296cfaeeb5077d0a9c4a82c2edd405122095710e161b78f9fad. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:31Z), 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/HUB161113080.