Stephan MacLeod is a Swiss bass and conductor focused on Baroque music in historically informed performance who has performed internationally. He was first bass of the Huelgas Ensemble for five years
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 0xbcced5691ae641d0cb93edee98a6b8ea58ae818c1f603795337af0a2c7b0798b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c09376d-1e60-44cc-aec7-d844a725843e.json and https://artists.proofprofile.net/proofs/artist/9c09376d-1e60-44cc-aec7-d844a725843e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il serpente di bronzo, ZWV 61: Potrei sovra degli empi (Dio)
Per l'Orchestra di Dresda, Vol.1 Ouverture
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 0xe4b83b3a643889afe5b54619e0348c05c22d486f4fa62fc9595994c3c1defb14. 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/FROV62125802.
Josquin Desprez: Missa Malheur me bat, NJE 9.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b42e4bb0672a4ca14f52320c18aacf96977b675f8673802272ad12f50a3bf7f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FROV62333801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a8bbd976ccd76e1e6e2fff609903ea74bf9b00e50c0c09d9ae622e23d0a07e. 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/FROV62333802.
Missa Malheur me bat, NJE 9.1: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc785e292c00671268f34d0e0217b34e2592585cdee399e1bd4e412c17939d019. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FROV62333803.
Nymphes des bois. Déploration [sur la mort] de Johannes Ockeghem, NJE 29.18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0985f1dcf54c1c7acb5c5823ba38eeb5cae5044eb2bdf652d7daac768aee2. 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/FROV62333804.
Missa malheur me bat, NJE 9.1: III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb248543cbae861c631feeeeffd27b26a837a1d398069d2e681b48191983acdf5. 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/FROV62333805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11b15fa8215cd8f77ad519bf8b5962ef18de01942a1f843052b6f31a2a0d671. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FROV62333806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e5645a5088c520558623bcfe5beaee58d689c7f05b59f618bf7a94e6f9b127. 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/FROV62333808.