David Lawson Jacques PhD is a British garden historian. He specializes in landscape conservation and the history of 17th and 18th century gardens. He was prominent in the campaign to have cultural la
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 0xe2f7607e0078f6681e65143449fc6dc3d9b6a4b30dfcc86dfbe6a9d95674c25c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95bd54b1-33cd-4082-9b2f-645c8c497841.json and https://artists.proofprofile.net/proofs/artist/95bd54b1-33cd-4082-9b2f-645c8c497841.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 0x24f275aa33ca750ae86c5da66cf7f14562c764eba3d08c880542dbb5686de95a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12408899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09364e5b3cd2618cc0eaef323335b81e3c94169da46ad898dc07379493ee416d. 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/FR9W12414019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfda7566f00406b1919f8b9256da9f45adb0e66d6d84b7881fae95f29faeaf44. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12414021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae722c3c4f12bff7a1b40a03d0399d0f2b38a4028be35f0b55c490dfe56b9c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12414022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317de2ae7a969a5a19e3b898da6c0bcb8c08ed6ed4c169c6be61434c34cdb32. 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/FR9W12408898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e880c63beda2b6810064a955e429c7f881da452929d1e4df6caaac44c11843. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12455275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9f887712584558813cd4891815cd0452ad66acb5c6ee426e47f0d82737532. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FR9W12455276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee909ccba6e9ed20e788db5ae7ea2965fd810c7c2ce10b469215ec5bad37fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12503286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf4737cce6d03e409cd30435fc9eaf2502f1b3c3343f91ae44d9ca7d9e73975. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FR9W12509745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397afb3be6bf102ff9ebaf3955417daf0d8fdff78d3bf46be3e94f5410b0927. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12505287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3a300bc78ba842aaf5852c49572af5e6ad6635ed7a37cf51f3052d92c65ee0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12503291.