David John Munrow (12 August 194215 May 1976) was a British musician and early music historian. Early life and education Munrow was born in Birmingham where both his parents taught at the Universi
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 0x0672cb953e3d25a85c65c9c63ebb78bf49a2aa6bb57e3de33896fe3eda481b86. 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/505b3e7f-7393-4cd0-97cc-cc24475ec2eb.json and https://artists.proofprofile.net/proofs/artist/505b3e7f-7393-4cd0-97cc-cc24475ec2eb.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 0x467fc9089ffaa720b7f4b5efc73bb26cc662a58261fa3fdee37f1ca1beb48297. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEF057502360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a23c6c8905cf0b60de6601c2ff6fd5f45d2518bb78c5e0da51255d2768225d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEF057502400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27329cbf4ba806c8d0ccb194eb47a2cffd158ab328a071ed7f2186907680d11e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEF057502420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f26292cc07ad68b696f13ddc5862cac3247b7ea8f515d4af007f66117e62af. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEF057502440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09fb5330dffc39df57a3064dcf01bc16dcdc083f5574069537927dd79cf174. 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/DEF057502450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe2180cf0fee556373cedbecca1da50bf2922a9a618f57770b5fe5f458cd067. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF057502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa7da39fbd698f61cd81fab07551f5704f5ddcb956a717d1f4e21e8f147ab9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEF057502520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0e971f40dc38306ca2d419ee516f1a7dbf7d700c935e7a26532f3a5317090. 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/DEF057502530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953517f6c30ab876086f96126164ca3d850d404f6fec5a5f75e6121e20ffa33d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEF057502550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5dbb652140f4d5ed681043c217bd67dab1dbe94b675f9486d176fd505e39bc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEF057502590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627bb7f5172a3831a0702eff1112755cef0a8ae493a440a0150f8461669af75. 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/DEF057502600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de32bff2521a1d26e6eb85034b4fb6b8630ec0934a1d390745ca09d4c848d29. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEF057502620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536155f077910d20450e8437d1d5950606fa93096ca8aaa395a2a4745a57efdf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEF057502690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491a1a672daf237e5fa0969a16c2134c9870fd5dbe3323596966c506aa5d1a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEF057502680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246a1d8f8204060c001b4154c04d4d0b57424edcf5e12aaee91c34f802bdaabc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEF057502700.
The Da Vinci Collection: Music of the Renaissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8b270d7d896cbae1eed5efd263ae067c73f634efe4af8b8046b2807c3785a. 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/GBAYD7200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba1f4f56d91cb81804d479ba9ce8a3c9f05c8fb89ce899c463974b12e8d44cb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYD9200594.