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 0xa537cf9915553d4dc6d9ed78274406cc30da34076c613a1daff12e189135540d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ed5c11c-06aa-4673-801a-f4c0163a0820.json and https://artists.proofprofile.net/proofs/artist/5ed5c11c-06aa-4673-801a-f4c0163a0820.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 0xc421bc59dc6971b98cb3ee95f08ef3c6932232be37e59d3755c4a43e4944631d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAS2345761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0f4e2d2687a22db8eb3dbe88a005facc5249ed0c344f3efaf0340ec0f8e9b6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWU2372104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053a61c5388e9bca594b31c0a1e311e22e8e4184ee77dedbf8af98a226a0815d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:39Z), 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/QZTAS2345767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84fd12f8f720276cf1e39934698f4b2b24651e2d3b59e7a6b12a4695f6da5c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:24Z), 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/QZMER2499924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0633f553ebdd2c4ea91275dac5a009cdc6edbbe2d564eef144467e3ba8314a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:55Z), 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/AUMTB2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b89b4d0bcce281774d4bbde1da8178cb426566ca643d193efe686c8d09a48. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNA2521716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2956fc52cb1130a236ac011feb07860e0cf7881d13aa12340cb1f75ec669ee7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:55Z), 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/QZHNC2599902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85d2efcfb8704d1df4544b13fe3da41736352567052219cfd787c471a9304c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWFH2533523.