Sir Brian Henry McGrath, GCVO, MW (27 October 1925 – 4 June 2016) was the Private Secretary to the Duke of Edinburgh. He was educated at Eton College. From 1943 to 1946, he served in the Irish Guards
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 0x0630f8b1168288d8d419bfe246180020af41a60065ddee53d8ca19417a08ab79. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7144e54c-f270-4277-9be4-38efc5be86a2.json and https://artists.proofprofile.net/proofs/artist/7144e54c-f270-4277-9be4-38efc5be86a2.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 0x04b369f8231dbb828bc6fb20db354136fcac33f3972968e1ac7db5ef0c402a09. 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/IEAOR0900004.
The Mist Covered Mountain / Scatter the Mud
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79547b5237c0431bdfec252b81f29f785636a4e69e50a0a5408f130bf34fc4fe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IEAOR0900005.
The Pigeon On the Gate / The Stoney Steps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4521789c216b47746370d158ed2796a2c9ab4eb2baadd19678cd961f1727b2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IEAOR0900008.
The Maids of Mont Cisco / Come West Along the Road
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6abff341a48a21fad2d755fc1c4c7e534e6a14f2257836f6df35d3aa4fdb62b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IEAOR0900010.
The Boys of Tandragee / The Wandering Minstrel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3d7bf0a6736b6eaba5d46bcf651eb16cd46f08fe0d382ee054a2367e986ffa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IEAOR0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aafb509f0b5f6a37ff8739f28832d329f02993b2451c79673a6266048581be. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/IEAOR0900012.
Far from Home / The Sally Gardens / The Sligo Maid - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271f7409135eff9d53a46baaebb8ca452c72a9a486f5b10c0e0c19f2fe86218. 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/USA371006607.
Teampall an Ghleantáinn / Buckley's Fancy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa163667dc40883dd86449c6bb3647c3b0eb00c2b7ed4f9aefc915585adfe08e8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHN62549614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7641d155a376a8ecb1e62698b467f1fc83b465c409799ab71045848957e49. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN62549615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6375dfc3331595e4f3653e4331130f24906515a5836db2c59d34d9d458fb64a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62549616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa703e084b1d969b357b683faa3eecb86085c074d45606cb91499af15f25886e5. 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/QZHN62549617.
The Sligo Reel / Tommy Coen's / Jimmy Giblin's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c790a10f2627142a8d01591ad92f55dec730bbcf19bc7f7fe5f86ab06ccd23. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN62549618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c3aa560e75d511a8513b23de64d340d997a4475e045c7dacf86112f5609147. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHN62549619.
Buck Mulligan's Hornpipe / An tSeanbhean Bhocht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77ef4732e305799e50271791ee62ace8617063e0503a6fc3c2026222d04956. 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/QZHN62549620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29bd57156b69d67c1e4a72206567f14150ddfeed2f62bb5194593953225b5d8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHN62549621.
Rigney's / The Flowing Bowl / Ashmolean House
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d6048a9619ea49b8f2fe0c03500d44489515d395882de5d3ddcd8c0e163eba. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN62549622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ca585f58f127bbbe3805982e6e19301b89077fc1cdfde1ab266e8eecf6f55. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN62549623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecfbc2cc2f29800a9fde4c626fd2e196803174678959eea687770c21595bfa3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZHN62549624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9f628a9c78fdf98f572d9c125f504ca0894bc0869d08ec933e813ff50a52a9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62549625.