Hank Brian Marvin (born Brian Robson Rankin; 28 October 1941) is an English musician and songwriter. He is known as the lead guitarist for the Shadows. Early life and career Marvin was born as Bria
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 0xfca0c77efa74c61ca9fe091bed507df0fa5326f1a51af484d36eb883ccd3f60b. 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/db452b16-6be0-496e-b6d2-a314702975e3.json and https://artists.proofprofile.net/proofs/artist/db452b16-6be0-496e-b6d2-a314702975e3.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 0x9e98e255500a10bc46b0eb7953e8f114935e85a945615f3b1c6e0bdff216a75e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBAYE9802009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf7476e7d4a000ed5dd8e92a9cba1c47126fade95806e69a40fabc1ef262c92. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBAYE9802016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f46547fc9066b71a60c56f26ddace0aee0a29159b2d7e82e0304c44c57f9cd2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:22Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHVK0600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c524e6155b3ab2624c40372f28ea47aeda523fceda6a8c2c34d54cc2c73830. 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/GBHVK0600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3516b5115749b9c138cae51a9cf2a4f509a2abc56e17476400cd2459f13d52. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBHVK0600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc744cdf478984253ebfc3350f6dc31e7f158094c03bcd821a9e8de411c3846ea. 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/GBHVK0600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cf25f7e2e67202dff5d896e7c43f3841fc09f118416f587bc9a69168efd8c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBHVK0600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999e02a6c880fee57bd61edeae8cf808fdc584e5f3c01acd6015615cabe03b23. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBFR9700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aad70d1fb0be0d7813c523baaa9b63a20f7c0eae91536b856f8e0dc1d2efc0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBFR9500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d55a29ba732afa8fe4e74b36f89b8985985d968c675ba1dd8ba39ef2968d078. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GBUM70703969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431137e92b76029615693deefa747039b9f16b55465c4eefc1f8b64abf4ccdd. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBUM70703954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4ddb9b3aea0448405f1b0536b73b69569fe3172d32a7d8dd19634360bbf38b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBUM70703968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b60879bca8f697e16ac78a7e4e00c709e3cc1db21ad0ab39212166c23a949. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBUM70703953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb91c90a6687be75bdff57fef62c0607659661e75ce44935e29ba9956e3ad1fb. 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/GBBLG1400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf93e9cd5ceb2ad042d5879c4de5bf1f872454c36d4bb323f9b2096ee8c2b743. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:05Z), 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/GBBLG1700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad5e8431668ff7a76ec1e7ea2113afb6d2f9bd560c376f2af616652e005853. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBBLG1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e458de22b8f4a262910443a9a268b971235ab069dbb76ebe7a60fd1c778fe24. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GBBLG1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a8707b57cb7da086b0692674186e917930257e85b8584b3816fa736d2a7b04. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUG10600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6448323e103f8a8cca12e488267921f0867a9526ed977dfcd2942813da52ce4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBHMW2400003.