Ewan McLennan is a Scottish folk musician and singer-songwriter. Although born in London, McLennan grew up in Edinburgh, and studied classical music on the piano. Later, he took up the guitar and as
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 0x554187ef05f8cbdb26c5df900c5ddcb9294515a8ed7d2e6a8bcce3e2ae2a1842. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9473d76-6c88-4083-9523-df817c23a59f.json and https://artists.proofprofile.net/proofs/artist/c9473d76-6c88-4083-9523-df817c23a59f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874971c3be9ab0c7a685f865d355562557b0481c7b8657e8d8f7a10cb26b0508. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBBAD1400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cbecf6c40207e7414ab2dc3939eb56af1ed4c4d24c1b855831929a4ab719c3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBAD1400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6321a06a572f649e1399bb3cb1b101d3904496e7592badca51b8535ca0c71. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBAD1400236.
Transatlantic Sessions - Series 6, Vol. Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144b47110b6889605765fcf401ad8db9dc0508af739fe39fe912ef4798da2986. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBQSK1303711.
Transatlantic Sessions - Series 6, Vol. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f709a60e74d1fe01666f8a30d4bd8b6cc5021901a86cc84ed095bad6140f41. 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/GBQSK1303509.
The Freewheelin' Bob Dylan: A Folk Tribute
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca0a3a6916510aea109e30eb7536b3519c71e0681e0fd0fede8c06393c06c64. 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/GB7VZ1100052.
Stand Up Now (Songs from the Landworkers’ Alliance.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f61226a7b061ffb99b3df9e86dc20e9d6dc94f9b6bf2a130d1ae679da913261. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/UKPJP2100004.
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
Transatlantic Sessions - Series 6, Vol. Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a591bbdd4f2b7352295c97bf80435eca409e9bf1b204cd4090c7065d0f734. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBQSK1303613.