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 0x83ddd037fbd847b913cbe404c0139c73beb7d7ad9dd57108acd72d08c7dbbdac. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d5d1a04-46bb-4809-8b14-3d8f9fadbd04.json and https://artists.proofprofile.net/proofs/artist/9d5d1a04-46bb-4809-8b14-3d8f9fadbd04.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Lapse of Time, an Oratorio on Charles Darwin: On the Origin of Species
Part II: Struggle for Life - The Lapse of Time, an oratorio on Darwin: On the Origin of Species
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 0xab364e85b8130a1f9e7a96f5d8133ee09fe646b4a75de95286792cd733675a04. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS2294020 — a six-check JSON result.
Part III: Change - The Lapse of Time, an oratorio on Darwin: On the Origin of Species
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b666227e3587c75154c7e3d57800783feca005b2090582df627199d256898. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS2294040 — a six-check JSON result.
Interlude 2: Bones! - The Lapse of Time, an oratorio on Darwin: On the Origin of Species
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d80bedb40b17486a8ae042afe9ad987f48e409e16e0e14378ef18339faac9f1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS2294060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00da8c7d84960b8be4a48c76be05f4174b106e10d853666162eb10a9269c68b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4565877cefe33409d5e70537d1c232dab813f46107c83dfd6e69191a203f497c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0976e9f9f40b5e88982e5baecdbaf9e1081b083bba54894711ec9f226c229af1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751f293936aa2ccf055bbb61e4deb2d175eb98e47459e2662436180c4bcc9518. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605120 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb2d120a51fe0c8a1671c871a6dbbc838c1dee8b33f345118bebfcdb34f6d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605150 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2884e6707f62955b3a311f5acca185f6e4e96950ad834c5c38b2b2e435f257. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605170 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf243f498d52bfa01050835dcde5624654ed09e2b5429fbe2444cf96f7f5d6b2b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOMPP1605151 — a six-check JSON result.
Det kimer nu til julefest (Arr. Marit Tøndel Bodsberg Weyde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e1f29c146cf5541d6cda00d9fbc0f2dde918b272f189ee075d6a517bfdb37e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cbc1e639fd746c92e8738fa85929a91cb10adbea7ee6604410934544d1779e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018020 — a six-check JSON result.
Fra fjord og fjære (Arr. Mette Østby Kamperhaug)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f430965309ed30b50b43df8b0edfb7955c6536ac94a70fb395b3ba59efc17b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018030 — a six-check JSON result.
Her kjem me, dine arme smaa (Arr. Idunn Vindspoll)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a664c4d05e947f4750a99c3871190b24a5406e620eb8de4f98d902aa3ad5b75. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99615e4a4b9a9451af1b6af427e921fa2a47cf9127ad04bedfe7effad927a4f5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87324d907ab7ee3451ab37efb65dcb72bc944895ef49e2db50b582f31f83568. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e681c31df833951e1dd0c1edc40a6358851b96277d893eea692d1a9872af6e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018090 — a six-check JSON result.
Deilig er den himmel blå (Arr. Idunn Vindspoll)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8ee7362f11f3a11e1fe3ed296f55180bc3bff3483e51c3f02eee17e04574f4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018120 — a six-check JSON result.
Nordnorsk julesalme (Arr. Magnus Fremstad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce578a2b305b223dba73890a6b9d66a815e8b0484dc44e0aeed814c1fdbad3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018140 — a six-check JSON result.
Drei geistliche Chöre, Op. 37 No. 1: O bone Jesu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0a6f9c377de61903ce9def1d5b6c052716553d89878b223425f50d913f4ca. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314010 — a six-check JSON result.
Zwölf Lieder und Romanzen, Op. 44: Barcarole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c8a8aa812071de8dfffaab1ead07f5b57270dcf0064c8d39148aea80769f4. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314080 — a six-check JSON result.
Vier Lieder aus dem Jungbrunnen, Op. 44: I. Nun Stehen die Rosen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251751b41de47b0b2bcc27660194c10f8abe4909b9dfa1092598c9bce537d30e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314120 — a six-check JSON result.
Vier Lieder aus dem Jungbrunnen, Op. 44: II. Die Berge sind spitz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cae9c3bc9aedd6b4cc93c98e3085c0ffbc6d9310cea3e378003ee456d4b0a9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314130 — a six-check JSON result.
Vier Lieder aus dem Jungbrunnen, Op. 44: IV. Und gehst du über den Kirchhof
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c3be1a301b4ea06cf40ad7d325eac45f3a105899d3e0f63756f752745ea1b0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314150 — a six-check JSON result.
Vier Gesänge, Op. 17: Es tönt ein voller Harfenklang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f2805d202f65e55c15bca8ac0bdea71abc479102888c0fb24c5d6b3abe1de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377aced5cbee2f596311bbdb9e57b05f5798cba4ab11a03bded91d858977973b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa22998f025d4f45d97e10d215fda5d4704fa0a2f4492a499e540054e7c6907. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX1314210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a664c4d05e947f4750a99c3871190b24a5406e620eb8de4f98d902aa3ad5b75. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2018060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5f7ae52d6488ec3b1eb176c9c219ba8a320c816e79f477fda371bcaa70530. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOEHX2211110 — a six-check JSON result.