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 0x4f496f3df5327dd81dcc36c45e9733ec14f65eb10d52bbab82421d9b2c3f9885. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1cf2f5a-612b-4ebd-9962-53f16e96a419.json and https://artists.proofprofile.net/proofs/artist/c1cf2f5a-612b-4ebd-9962-53f16e96a419.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 0xe8f9cdb2bff9f5795919488b5ed8133f7032abbc47a774c3edb2b648b6f45076. 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/IDB832401790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b36aa49aed31b9c1257cf11001c0b500134bba928226cd4560d7713fc73e2fb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/IDB832401791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02525f9f78d7cd22f3d6d1ad74cef821990b576e516b0a8ab4e0edc150cbca4e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:40Z), 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/IDB832401792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c563afe5f7d1a56b5f7e56f63c1aba65f028bb333d1d7eb69b5aa9a93ca3f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/IDB832501645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a6c1f9acd0d51f791af5a3267c5bfd30dec9a91ec86b2202b096c1991f2775. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL8RL2550677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7c1db51f70c5c77564aa5fcb3a2720fdc782851b246f7948817de6264806c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NL8RL2550678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37968fa28060ee080077f08c5f8306269f92b40ef35679b31a3f0f5b109e3fea. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/NL8RL2550680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65da1e4109d1855c5746ba02cd49edefdc5f7d809b388990e6f43addeff100. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:44:52Z), 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/NL8RL2550681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68e990eb8edc1cb776bc7200def116849ddca334b8f1d0b1c603be03b0b21d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:26Z), 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/NL8RL2550683.