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 0xe9ecad29e0927ec34da504e89bd0569699bf94b3fd0cb4f92fca40d5c2f914ba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf96ab0-f015-45b7-9b61-b505132a6969.json and https://artists.proofprofile.net/proofs/artist/bcf96ab0-f015-45b7-9b61-b505132a6969.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 0xf7cacf0159ef9698e98937d7ff4b2212e82e70229c6b6bebcf13cbc0bd85424a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62558037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f99f311533c257eadfb165df18d618f9ae74a29e7ee3eb55ae6154726138bb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB72512728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1c2f09ae1bb1176985870e27db6e765f781f80b9a88860d5f230bd5c7a118f. 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/QZTB72512725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe528b1a979696b393f74d118f86e023d140732af9df3030aff481c2012263. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBE2599578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c224131cbb0d54331496443d9c57f331a4b1a2ef83233e3d8f43a8d4a462a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:11Z), 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/QZTBF2501845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a62baea3af10719614dde6d30050e990ad38197aa0f9736ce1435161fc616. 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/QZWFK2500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ac5820c02d2f4ea6e1a21be3ba2f94cc3d0f481f38257cffa77ec5250da40. 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/QZZ7N2502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380140f4f608bf4637be7336b751ae145279ef922c9db9cf0605ce167d49158f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7S2587186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1f3c0259b32a0814d2a8e507844d92ca61c01fe425baa0626aaf49415f596. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:42:57Z), 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/QT3F42569178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489f58ff571d23fe6f67a7c914ac3e3dfb7dbc2cb56fde8bda50de41213450db. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3FD2582718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b92041d7b77773b251312592ac881d241890d62e4213774fbfc34a4efec06e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:27Z), 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/QT3FG2551587.