Roger Maxwell Chapman (born 8 April 1942 in Leicester), also known as Chappo, is an English rock vocalist.[ Roger Chapman] at AllMusic He is best known as a member of the progressive rock band Family,
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 0xb9eb35a6ef83000bc505efa2deb6a5495abe65dfd8ff1e429dd705cb1615af7e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f71d6b8-686b-423d-9280-68d1896d7f19.json and https://artists.proofprofile.net/proofs/artist/4f71d6b8-686b-423d-9280-68d1896d7f19.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Streetwalkers (2024 Expanded & Remastered Edition)
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 0x9e716ec49905283c8dcde502b94878ec257e51b7a9ce622685bd1ed2db64b126. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY2201767 — a six-check JSON result.
Who Pulled The Nite Down - 2022 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eae1010129875c0e34b4cb22332c57bcc2341ea7a211248544f87d0b11a263. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY2201771 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8d7f0a0e7a36e0c03dedbffee4e63f3b6a77355fc0ab478e6e13d839e0a45. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY2204491 — a six-check JSON result.
Chappo: Loft Tapes, Vol. 4 (Live at Unca Po's, Hamburg, 05/03/1982)
Moth To A Flame: The Recordings 1979-1981
Turn It Up Loud: The Recordings 1981-1985 (2022 Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36502ba2c5fe4d1f090bc576fde8e5ebe8ca9e33a5af8c86cbba2f2f9578331. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY2205983 — a six-check JSON result.
Shadow on the Wall - (Live In Berlin) [2022 Remaster]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2afadcc0c79d3e5ed813fe04b8838924efe42e486a0ccd8e77a7a00df5e33e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBLY2206035 — a six-check JSON result.