Angus Edmund Upton Maude, Baron Maude of Stratford-upon-Avon, (8 September 1912 – 9 November 1993) was an English Conservative Party politician. A Member of Parliament (MP) from 1950 to 1958 and from
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 0xaf5e4a05d4cbc3a1288e7b87cffe499ce617b49861edb646b7d7127d74632e34. 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/88d63e5e-9d20-46d9-abb8-4e89e8d4fe88.json and https://artists.proofprofile.net/proofs/artist/88d63e5e-9d20-46d9-abb8-4e89e8d4fe88.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 0x22fd37d4c365297eedf9112d4500aab17156a9c85d7e57a5a5219d7310934986. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/TCACM1669064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1639814e0e08cf0d54467b78a7127ead855dc9e7c6f8c03becf92144514a35b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TCACO1667582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa112ad05498d849d88ea34945d92130ef5a39a0e4049954dee093c019880e26a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCACO1681582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97a23c8543475a85fddb295ee3fe88a4819ab59199f9b9d50336e9f63718c1c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCADA1788244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd2377e8abd219216835983f9ac9bbaa123d947ac4c4df0e2bb439e7b0abc67. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADS1850183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b8fc1f52a9a791595caa1d846ec88b7d4b088cfa6137cbf880b6bf307b890d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZMEN2238681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e50a5014af0d585155a0206c55bf41c926a519184632df3bc47700dc1ca9b8f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZ5FN2368311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4326457d078f8eb7f35da9c638cbdfc64ce8a31fd21bf5548e12db8cbf0da1. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/FRX452424377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5434ee4380b043e7a523723f157b016b476b142fd38441ff47c692ab811bff. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA0P2453267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a028fb30393be61aaf28a91943b77b1b8ade6bd57fe4955fd5781c4b722998. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX282514944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a3f1c0cf0165b144537b915c4d5c8ae63809270ef8812597faf751df84f9c. 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/DGA052537312.