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 0x527253e77058e47efb20997caac869dc856693262345df59534a96d266aecb00. 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/d2223554-7701-4b21-abe5-4a8f3db3f90b.json and https://artists.proofprofile.net/proofs/artist/d2223554-7701-4b21-abe5-4a8f3db3f90b.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 0x8dfa25c01305cf922ef8a51af8d96b2401c03f3a0ccf75390538fa3848660695. 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/QZNWQ2151990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39aa1c3a53eb78e61ccb95cb68f3c6379a73bb88f92a63cefabd92e0a4e0c04. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ZA56E2150125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d00153d28677a99312d5eb97a3d46281da2cfc915a468d1043d4269bcdd41. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA56E2250632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a32af83157d715f7a68e7ea44153f3d8d94690784948db62b4dcc60e268c98. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:06:27Z), 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/ZA56E2304583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe518e2b8defbbb43825e2c69825d4f31f5aa0cc38f0f469421beb996dc211e87. 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/USA2P2509102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dba72d032e32530b07e0a82aebda280f0b52e96d2940546a5139f6ba90cbc3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SGW502443152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae9021f5b30c574e105ca7ce8bda212c3548e993333a077da326128ade8ab7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22496358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986822603d98339a0fa35b887860bbcb49ff74de54aaceac1e8d9ee1151400b8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22496359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a26fe1ededfd1f38aec1fa45b7da8178842565cee44fd5ce7a5094fa458519. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM22496360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e30e7db7fb90bc0b0db8ad1f0727b0c52d43b432de58faf15a4658a27ba34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM22496361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662acea21e542cafd542c67a467bf731e2a8523f1869943f2680bbf8b60ef00d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZA56E2304762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662acea21e542cafd542c67a467bf731e2a8523f1869943f2680bbf8b60ef00d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA56E2304762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d020c997295ca80bb547f73b3cd6ce4b6efe2b4bec22ee5d63c5cb7ea835c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMZ92457060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc1e5edd4421296dfccf8a90771caba28626ec9b859f3ed334c14f42d7048c7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52421969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d5ec978e570e819401f689ed6e836711c2bfe3db7e939990fdec07238906f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1703520.