Sir Alan Charles MacLaurin Mackerras (; (17 November 1925 – 14 July 2010) was an American-born Australian conductor. He was an authority on the operas of Janáček and Mozart, and the comic operas of Gi
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 0x1f47b806e9200e2b095bc884f4e71b5e8e9f815d60073ce892b23d93f53b6ea8. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9471587-b7d2-4e84-a8cd-5ae33162f9ba.json and https://artists.proofprofile.net/proofs/artist/d9471587-b7d2-4e84-a8cd-5ae33162f9ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Janácek: Sinfonietta, 4 Opera Preludes, Taras Bulba
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 0xf77e184a16c197ecb24d1292fd663af523e63eba121527c38e4b500090f1cac3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX761938001.
Handel Favourites – Arrival of the Queen of Sheda, Water Music, and more – Mackerras, Szell, Menuhi,n Somary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa060a44564d03c4a6d1fd0d133830c30f1fa3e9187a82d2d7b7af7b455838efe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USX761734001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34745598d88242434c7bdd7c0e7b74bb47943d62ad58879f470b183842fb19b. 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/USX761734003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1088264d2418b88feb666da4cfea833266c8d0515e1fc47060086814eb1590ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX761734006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647cff85162986fe661b2b87c913e970000f224e426a44c148d3b8708d43a5e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX761219101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c8f2399f46f35064c9d55b0b68ff144b7ae9e8b9459e72c055e48312c1bf15. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX761219115.
Creampuffs from Vienna: Rare Old Vienna Dances
Pineapple Poll (Ballet) & Favourite Sullivan Overtures
Joan Sutherland Collector's Album: Rare Broadcasts
Mussorgsky: Pictures at an Exhibition; Stravinsky: Petrushka
R. Strauss: Also Sprach Zarathustra; Don Juan & Till Eulenspiegel
Also Sprach Zarathustra, Op. 30 TrV 176: I. Sonnenaufgang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a77a4c3ff58b103289b37a0ae36b6afb75825a3a2e519e979e6aba988361e1. 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/USX761219701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f6475911fa82585a8f63d0c7af344ea5fcb46027e4da21152b85b8b956c3e. 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/GBC7N1808420.
Martinu: Double Concerto Sinfonietta Giocosa Rhapsody-Concerto
Double Concerto for two string orchestras, piano, & timpani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa224c4bbe4513aaa556d3f03b1da96fd8d647fc3802fa846205bc6562a65c52d. 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/USX761426702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3b4f0cd6bbc38a5f5e18d120c488bf18286a60189766cdb6836ad613d00b38. 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/USX761426703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f8bf2885ce1366a8e8cf77531442e242a720a947ee9b8aa8f8f7aafc5677eb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX761426701.
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
Sinfonietta Giocosa for piano and small orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe907489eaa2a662b72c7147c5f47e67a90be972a53765b1152243168efe5a97a. 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/USX761426704.
Lincolnshire Posy (Frederick Fennell's Wind Ensemble Series Vol.8)
Lincolnshire Posy I. Lisbon - Recording at Fumon Hall, Tokyo, 1986
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436eaa35d4034980b8f8bea15ecac982dd2e1597567bb9dc1f096177894a5f0d. 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/JPZ921111872.
Lincolnshire Posy V. Lord Melbourne - Recording at Fumon Hall, Tokyo, 1986
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968abd561860cbe02e071d5672f3ffc80cc3221a6df9a64dc7e01898d6fd7e8e. 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/JPZ921111876.
MERRY CHRISTMAS - German Christmas Carols
Deutsche Weihnachtslieder - Von Klassik bis Pop - Frohe Weihnachten
Stille Nacht - All the Versions of the Christmas Classic