Maurice Henderson (4 April 1913 - 14 October 1989) was a Scotland international rugby union player. Rugby Union career Amateur career He also played club rugby for Dunfermline.Scotland. The Essentia
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7234372f96d33b2b90efa0e384d950ad83a57dfe56218df1983a4cfef43b0c07. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0542c6d2-4a06-461e-8039-be1cd4d4926e.json and https://artists.proofprofile.net/proofs/artist/0542c6d2-4a06-461e-8039-be1cd4d4926e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Fiddlers' Bid Ode to Joy: Da Boys o' da Lounge / The Grimbergen Blonde / Chris Stout's Compliments to the Bon Accord Ale House
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c716691d7a1ba0d87cd04c16eb59613d12514501254222a1f7814efe0524f. 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/GB4NV0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7f020ebb503872d86e463dc58ffec87e71cf146d2c1caa9133c3ff4f9f1e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB4NV0900003.
Skeklers: Aamer August / Hunter's Hill / Sigurd o' Gord's Spring / Da Skelers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872c3d4f5753be2eac2c313ce29faba87a5e41eece196af784f21375a8ed764. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB4NV0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101a0b658eb0131f203bf3107b67a0aa03594929ec1185ee1e17ca0a362ebc8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB4NV0900005.
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
All Dressed in Yellow: Simon's Wart / Lowrie's Reel / Up and Doon da Harbour / Da Cross Reel / Cascou / Bingsjö Lilla Langdans / Aa Dressed in Yallo'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd600523a4d04cb477261cdee5f66f0f5287a507633618ca943c272afe348d0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GB4NV0900006.