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 0x2ac0e2831164f5128eee7fbe410cb2a3b591d3e6327ba4e09e5efe9f32bb071f. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/328e33ea-ba4c-45c2-9e07-b08307e93f8c.json and https://artists.proofprofile.net/proofs/artist/328e33ea-ba4c-45c2-9e07-b08307e93f8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello and Bayan Arrangements - Piazzolla, A. / Villa-Lobos, H. / Falla, M. / Stravinsky, I. / Tsintsadze, S.
Sonic Rebellion - Alternative Classical Collection
Gubaidulina: Seven Words / Silenzio / In Croce
In croce (version for cello and accordion)
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 0x9c46dc1680f35d928f9d604d146f6f6c283ea971325950a8d1399cb038d03a58. 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/HKI199510601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d203c2e0cb6a8ab7a21c640306b0cb1dda699e496ae973f435094325c409a6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199510602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ae7ebce317ae4b26b0e7690313486928b1d30b355c91c8d2bd944b8c1ef0d8. 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/HKI199510603.
7 Worte (7 Words): Vater, vergib ihnen, denn sie wissen nicht, was sie tun (Father, forgive them....)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5a2ad0850d9e42b7c4fd50f40043516d86efbb8b75a0c0aa5352ff8bf8a5dd. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKI199510607.
7 Worte (7 Words): Weib, siehe, das ist dein Sohn. Siehe, das ist deine Mutter (Woman, behold thy Son. Son, behold....)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26896f4d919cf4f1d56459d2845f9b9c97f05d8649d0fa26195999cbd6762e42. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199510608.
7 Worte (7 Words): Wahrlich, ich sage dir: Heute wirst du mit mir im Paradiese sein (Verily, I say unto thee....)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691a2ddfdc64753ac9187b8089a5b98154d3cf15757e9274274805b29f33662. 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/HKI199510609.
7 Worte (7 Words): Mein Gott, mein Gott, warum hast du mich verlassen? (My God, my God, why hast thou forsaken me?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5975d54fbc0e00b913e06cb9e2f0bd307ef72f6e9048bbf13eca59cbd4c53d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKI199510610.
7 Worte (7 Words): Es ist vollbracht (It is accomplished)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dfb339970a270cbe4c79738b33b2c6b06f1f6ff487ff70dcdc7feca2c8c40a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199510612.
7 Worte (7 Words): Vater, ich befehle meinen Geist in deine Hande (Father, into thy hands I commend my spirit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce05e17ae3fddc0250e6a4fd2a3d521ef461c396e51912a05817fd0137d820. 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/HKI199510613.
Sofia Gubaidulina - Triple Concerto for Violin, Cello and Bayan & Rejoice! for Violin and Cello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3545a6f1158ae62ef0df0716518a117d680412a85c8400b521eeabbafc07f5a6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEB952423001.
Gubaidulina: 7 Worte; 10 Preludes; De profundis
Sieben Worte for Cello, Bayan & Strings: I. Vater, vergib ihnen, denn sie wissen nicht, was sie tun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be2d4dca982f3829793bd2962420d9f143dc9243693043e5b5d625524a71125. 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/DEB330177501.
Sieben Worte for Cello, Bayan & Strings: II. Weib, siehe, das ist dein Sohn – Siehe, das ist deine Mutter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac716e32af16a47ba384ffc711ab6f3baee4acc09f30e0fc7a1aede17883caa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330177502.
Sieben Worte for Cello, Bayan & Strings: III. Wahrlich, ich sage dir: Heute wirst du mit mir im Paradiese sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b04238962764365e4fcc0adf1d2ba8b2208281cd67e518a22d99d993740f26. 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/DEB330177503.
Sieben Worte for Cello, Bayan & Strings: IV. Mein Gott, mein Gott, warum hast du mich verlassen?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0e4a5d29cc8b07822f2d22da2d6975b1d843a594618a88749c0b9b14dd5236. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB330177504.
Sieben Worte for Cello, Bayan & Strings: V. Mich dürstet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae652130afeec964a1352be9937a4f660a6a7647aa5acc9cf1b7ebc3baa4fb7b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330177505.
Sieben Worte for Cello, Bayan & Strings: VI. Es ist vollbracht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103477f1acbb00bd4cc5bc2f8c00a7ce5435b676c9cd42fdaacf920aa105c59. 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/DEB330177506.
Sieben Worte for Cello, Bayan & Strings: VII. Vater, ich befehle meinen Geist in deine Hände
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaedb104b84237c633bbe217cf64de2d3b2e5fc52faa1211d8aac15bfea2b3e0. 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/DEB330177507.
Ten Preludes for Cello Solo: I. Staccato – Legato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81812e404266656dd22efb7c47edc4328d284d97fb4140a9a04e22499799a363. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330177508.
Ten Preludes for Cello Solo: II. Legato – Staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fcafc4edfd7b46aa27a943e464201ad7a97f17a6d8781464d2639ad9b51dc2. 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/DEB330177509.
Ten Preludes for Cello Solo: III. Con sordino – Senza sordino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121481bf8b4c06dde6e0684a64f4f3c7daba97e9a80cf4059177555a7c3b2135. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330177510.
Ten Preludes for Cello Solo: IV. Ricochet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153027abecfcff7fec8f0494a052a2295f7372d0739570ea8b9514ffafb1e8d1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330177511.
Ten Preludes for Cello Solo: V. Sul ponticello – Ordinario – Sul tasto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a331ad258cf55ce5f42b8c8bf52699a1aa8cd47fb6777a6da43aa8a7197b42. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB330177512.
Ten Preludes for Cello Solo: VI. Flagioletti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d369900d6ca3b5f1e22a355a9c130eb6aa7f049615e44b66b6b529fa618076. 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/DEB330177513.
Ten Preludes for Cello Solo: VII. Al taco – Da punta d'arco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd166e40cd2cfc68f8522b8a45c0e3c841204b416eb0424fc3eb57a144830953b. 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/DEB330177514.
Ten Preludes for Cello Solo: VIII. Arco – Pizzicato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e01fbbae66a1a25eb9e070e75a6684fc8eeb37993ace549666c922ee5d2c0cc. 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/DEB330177515.
Ten Preludes for Cello Solo: IX. Pizzicato – Arco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3fd8f139107380b7fcb61018fb7c25fd9567257901cb2fbd7febab0e2c579. 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/DEB330177516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cfcb3a17fcc7c6791136dc7939625076cff793df27e16dd1c5ab31ff5631b. 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/DEB330177518.
Sofia Gubaidulina - Triple Concerto for Violine, Cello and Bayan
Gubaidulina: Seven Words; String Trio; Garten von Freuden und Traurigkeiten (Lockenhaus Collection Vol. 10)
Seven Words for Cello, Bayan and Strings
Kammerorchester der jungen deutschen Philharmonie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae500347b4f1339c6c369c5b9dc9133a301cab859dd503ca4f9c398226ceedf8. 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/NLA509012254.