Ekseption was a Dutch rock band active from 1967 to 1989, playing mostly-instrumental progressive rock and classical rock. The central character in the changing roster, and the only band member presen
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 0xa8a8f2897b65f1a7ed710049a6461d93223d385714843a26c49d106d96618bf4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e563156-852a-4f74-9dcc-05af74cbf901.json and https://artists.proofprofile.net/proofs/artist/2e563156-852a-4f74-9dcc-05af74cbf901.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 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 0xead906891b01287637bd8604f8bd306791eea20862dc6f23e67971becf41dbbb. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLA307000154.
Italian Concerto In F Bwv 971: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73177401b6abd404d81f54a2c8a112647e303e779283462dbbd1a60395045490. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLA307000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3302f738a9bec5b18aa2042600c40706284485ef9922965efa26648bcf731650. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NLA307000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df96610039c67f630369acedc9c343b0c420d35f646fe8a638e689a7d2c4b5. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/NLA306900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe246c8d5379ee91c1657c5d434377f49334c2a55d71035f72c49264141cff103. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLA306900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc255454db9ec87597fc1facb73fbe7b97a30a3a4aabda93ffff952176f28d0e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLA306900306.
The Lamplighter (Prelude And Fugue In A Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e5a992d319fd5be49221a1476bacf24c7a2a5213a7e80b36aff8f80290090. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLA307000147.
Rondo: Piano Concerto No. 3 In C Minor Opus 37
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391420f7aa82f2c5af4af9cbd1357b0a919a85d6f15df42a2c9d5023e5b357b0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/NLA307000076.
Ave Maria Medley: Fugue In D Minor - Ave Maria - Prelude No. 1 In C
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5f65620324ec3b0ef9b2414cbe450aac2854c491453b8df7846d82c2603ac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLA307100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa836227b1c5606400ee01dfed1cc48b919f7ef450193c600efb14799756f5a75. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/NLA307100120.
Siciliano in G (From Sonate For Flute And Harpsichord E, BWV 1031)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7129d09c6bf72df81f19b68fee264daef1abb3169d7f83dcc5890b23b96fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLA307200247.
Vivace (Concerto For Violin And Orchestra In A Minor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c8ff8d940691fc20118973b7ebde60845626d5a81a6eda284d3a82f4e17139. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLA307200068.
A La Turka (Piano Sonata No. 11 In A K331: Alla Turca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40bf2f36a152f5520c74c63cb3db0b586b4df3eadf9124dacf885b283f31f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLA307200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3700f0e91f5ba5b7090e0288852b390dfa5d1acd0aa6b102c9e2e98d7d20c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/NLA307200249.
Trinity (Expanded Edition / Remastered 2023)
Mindmirror (Expanded Edition / Remastered 2023)
Ekseption - The Last Live Concert Tapes / Cum Laude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa41436050c3baf12208804e3ecb94322bd3105d0b14c9455c63c0f36b847634. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLA307000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778bca03fe9171f39cd0c35f52998670ef98a3f82464a92a83f1fa93661c08df. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLA306900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdba852579b8be9c8e2e1a93c30eb6f0a19da00608d36baf9a2b36701bc1027. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLA306900016.