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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00f0276afb3673ecd83206a065e0142aeac365427b1388c79c1e02721427e8a. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98bf36b3-4f36-467c-9989-0d7c34b647d2.json and https://artists.proofprofile.net/proofs/artist/98bf36b3-4f36-467c-9989-0d7c34b647d2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d1fcd3f1a0021c2bdacc2914671e1ea38f1db09f55dadbe5e8c300e86ce367. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKPL1779238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549fb5ba35b139fc06bdbb5c5fce22d145f222681bac417a00f12f27b30ca785. 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/GBKPL1779239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf96124238b78c09c0e17fe1db24ada9bdbeaf9ed73e2e2760a2eba2f97c4a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1779240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5fc6ac4fb1f646563dd5cb8af66c3c3f589ed1d7d155fd9737a562d7365a90. 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/GBKPL1779241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69239edd8fb8b4cdc8e6dc32ab110ca4bfac111274d06c454d9bba8ae484c5e. 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/GBKPL1779242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada71a234cdd6c7922b6d31b66a18d1536165e87536afd571dbf640c0d9668b. 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/GBKPL1779248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa63c05d0027825fe6cd1a6b14a7c3def39c90a8493912e9aea326a64314c9b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKPL1779249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615b0d070133c6a42849bedabe84c98b4f76e7e06ddcda168dcb65bdbb26f52. 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/GBKPL1779250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe721d6f14b87d3d0bb667ded2b83f444cb20e8e33922e9fb583bf51d70a7a6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKPL1779247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1c29c1e9c956308ef7be945acbf8fc7a01ec882e82d1c3c2410115b634073. 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/GBKPL1779237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0261795a70eefcbeaff7b20f4f812e9d8f5fac38d2b455ba5e03867596e5c081. 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/GBKPL1779244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1d5c81549fa944aeccfbe84e32fa83e949c04102d7f75b962d6f86458dadff. 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/GBKPL1779245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc42aa80cbe14f75ad341dccf8b2d3d3398241ae741fc3b503aeb15e10233f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKPL1779246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b92b45f569db6842fb3db5886e1c17944c3c62131d5da4ca2b7443c6e6230c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKPL1779243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e980cf9d120cf1ed222ccf70b81f5c6b005c3e385b22e6a30c12c3187a6054. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e980cf9d120cf1ed222ccf70b81f5c6b005c3e385b22e6a30c12c3187a6054. 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/US6QR2300088.