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 0x41d2667ba68a36ea97d240d40b1ef91879335a7ce7194b200accbdd83b62885a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60a748be-3f5c-4304-b429-626424488a14.json and https://artists.proofprofile.net/proofs/artist/60a748be-3f5c-4304-b429-626424488a14.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 0x247c415c26dbdf863331068f4e467f4f5ea804a927a5202081b03db248f337f0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:46Z), 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/QZRP42158257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa97fbab0e2dfc5472ac5088683bfb50c112c43bedcece6e23c58c5d73ea8d84. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:45Z), 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/QZRP52156136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47195e78934885e919c7b4ad431d6df2f9a7437ddc9876b9c07afc80fd19353a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6G2264587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a47d44b87aa505774f800866c7db273f66f28aa8d2ad42000b6cbe26e2f020. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZES92407160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850078d751e18d5464599a67a624d00b9f13669af856e721009e58e9f2798bb8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:05:20Z), 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/TCAIB2440130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716fffdd720b8fbdef6cc939106c2deedc2b640f413c092a37752c7b664567f3. 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/QZWFM2426884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc30779def4fff2f673ebd5cf93f4aaf2a2d50206e8e8439506fbf4a98bb4d09. 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/QZNWT2565736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967d4fabc559e7cff7aef5c4271b2d428abc4fce3f2270e6defb6af122586494. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:35:19Z), 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/QZTB32578201.