thumb|right|Knaifel in 1982 Alexander Aronovich Knaifel (; also Knayfel, Knayfel, or Kneifel; 28 November 1943 – 27 June 2024) was a Soviet composer from Tashkent, Uzbekistan, known for his operas The
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 0x82b4bad5dda910e60a411a744faf4dd4f86d21496b30e212561b8153b80b03e4. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95127770-58a8-47c9-908a-97b062cacd4c.json and https://artists.proofprofile.net/proofs/artist/95127770-58a8-47c9-908a-97b062cacd4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cassadó: Toccata in the Style of Frescobaldi
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 0xac64692fb98823bd1654d9c413b163ebd5422bb35e27c7a5949ccfc03c16a26c. 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/DEA809300211.
Marcello / Arr Bach, JS : Concerto in D minor [BWV974] : II Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0af99b92e98dfb7bc33a6bfa36b54e9c003c66b677d4c9800a68c2255b91b84. 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/DEA809300212.
Bach, JS / Arr. Kodály for Cello and Organ: 3 Chorale Preludes: No. 2, Vater unser im Himmelreich, BWV 762
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6851f4bbf3d42f7a20085935d62d997f6c1800e70ad521d78c054f35fc4410. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEA809300214.
Handel / Arr. Pekker for Cello and Organ: Te Deum in D Major, HWV 283 "Dettingen": XIV. Vouchsafe, O Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4308fafd5ba29b0055387a45e654f03fc4ec2a49abeee507f5ccc6e6e956c4fc. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEA809300216.
Bach, JS / Arr. Siloti: Toccata, Adagio and Fugue in C Major, BWV 564: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54cfa75a6f7874175f9159cda5263dbe70f24a5c81d86d54deeedbed2f75cc9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEA809300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a53cdb8645cde720033d2cb69ef556fbba7c70c5776f6e783d768760ae3f8. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEB331243601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b71ac4f5824d5017fc505099d614c8a3c4e8958a73ff579e9ee6137bd2eba50. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB330695702.
In Air Clear And Unseen: 1. In Some Exhausted Reverie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3564469cb2caa925b5a36c3cfb87390f58caf3b68fc646819d3ac835b20cf. 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/DEB330076301.
In Air Clear And Unseen: 2. An Autumn Evening
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401c574ecce3abf36dd3f9fbb4e6974ee94aea982defa379a5ecd9e922f6ab51. 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/DEB330076302.
In Air Clear And Unseen: 3. In Air Clear And Unseen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5555040da6da596761806fbdaf762d9081cc57a7051f5078c4cfd488467d3266. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEB330076303.
Svete Tikhiy (O Gladsome Light): 1. Ringing Of The Church Bells
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c2a767b3c2792859f0e9058c9b9c1f9d9e51a28f5bde0bb383f4824bf6254. 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/DEB330076304.
Svete Tikhiy (O Gladsome Light): 2. The Song Of The Most Holy Theotokos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f086745765781633a936cd66fe5475a4bfdbcfc1b4ed31b48e6aed6a28f09. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEB330076305.
Svete Tikhiy (O Gladsome Light): 3. Svete Tikhiy (O Gladsome Light)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a8cfe2748949af09fa3a8262ec7b742ccdd8d672562caab9e37508b33c07c. 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/DEB330076306.
Knaifel: Make me drunk with your kisses - Matthews, David: Romanza (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c7fa9e825b5cf742c1be980dded4cbaa6a1b5ddeee620d89406aeebc1ae4ec. 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/USA560664222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a6a4894ca1e98e456d3676482cde39e3745ad62a3cbec19b5a57320e4d636d. 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/IEDGB0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b65b13eeb8b3d5d5eaefbc7fdc3d43470cc484c1ed15f21d2cda64806674d. 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/IEDGB0900005.
Torrid Classics - Voluptuous Music for Passionate Nights