Sally Holland is a registered social worker, researcher, and teacher, who was the Children's Commissioner for Wales 2015–2022. Early life Holland was born in Scotland. She moved to Wales in 1992 and
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 0x0234ad0f8b30c96b2f153de1d632560cdd046945bdb82301fc34d5e9dbf541ab. 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/d71ec61f-b824-426e-8b3d-b13ac3dee6d7.json and https://artists.proofprofile.net/proofs/artist/d71ec61f-b824-426e-8b3d-b13ac3dee6d7.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 0x9e2a74e59291478ac5d30ea35d698ecede1a5d7abf938271c8afc02761b90094. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5W32101635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950710d0e9552be0ff41866d70b645c1a52484bc0283007bca7bda19f14a3041. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:18:27Z), 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/SE5W32306552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825e5e68af3fba12943ea3a4ea0a75620eca656f6620a26a2884ea3c0a493322. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:39Z), 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/SE5W32405197.
人生のメリーゴーランド (ピアノ)『ハウルの動く城』より