Sofia Asgatovna Gubaidulina (24 October 1931 – 13 March 2025) was a Soviet and Russian composer of modernist sacred music.Nelsson, Richard. "The Rest is Noise festival: Politics and spirituality". 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3b7f86bee5bea5a784737d8a6a61b1f66917897e96f69f27d61f79f6aa2903. 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/987b7063-82be-4393-aeb3-4d49c9dfb061.json and https://artists.proofprofile.net/proofs/artist/987b7063-82be-4393-aeb3-4d49c9dfb061.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gubaidulina: '...The Deceitful Face of Hope and Despair' / Sieben Worte
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 0xe47ded98f15cbdc5b118c9293e29649d5c6b06e10b72a46aeb95846b7cc03ff5. 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/SEAEO0649010.
Gubaidulina: Seven Words / Silenzio / In Croce
In croce (version for cello and accordion)
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 0x77ae7ebce317ae4b26b0e7690313486928b1d30b355c91c8d2bd944b8c1ef0d8. 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/HKI199510603.
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): 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.
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.
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
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): 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.
Sofia Gubaidulina: Works for Cello & Accordion
Seven Words for Cello, Accordion & Strings: I. Father, Forgive Them, for They Know Not What They Do
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e1872e27502bb57250ae021b5b78ffaec30cc60c1995f254ed1fa01a46750a. 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/PLE442140001.
Seven Words for Cello, Accordion & Strings: III. Verily, I Say unto Thee – Today Shalt Thou Be with Me in Paradise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacdbb5f3e6ab4de7b31239bb220f67346d32b5e091d410db222aea6e0328e83. 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/PLE442140003.
Seven Words for Cello, Accordion & Strings: VI. It Is Accomplished
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5dd6809a253893d8ad5c3f7f687f779a5286bdc3c25cea90ac5f355fd7111f. 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/PLE442140006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58de06e66e4feff499d3d344933fad3d0ba58f9173462105961eb27737ea298. 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/PLE442140008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34201ecb2b253635fef8a66c63bf82ffa09bbd5bfd182b8e5c8b6d942d2ec158. 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/PLE442140009.
Seven Words for Cello, Accordion & Strings: II. Woman, Behold Thy Son. Son, Behold Thy Mather
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7f9d6dd7c1d75990dc9b58646acb0a7c25edf1aa2d11287ea4e80271a34d78. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLE442140002.
Seven Words for Cello, Accordion & Strings: IV. My God, My God, Why Hast Thou Forsaken Me?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0088c85cb30bc1e035a3190c96f94b4e4b55e70ec8d7084a9067fee63b4bb7f9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLE442140004.
Seven Words for Cello, Accordion & Strings: V. I Thirst
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac37f0488d05d02e1ab07cf3ff0214dee86a51ef408fc5ef8014530219008d3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLE442140005.
Seven Words for Cello, Accordion & Strings: VII. Father, into Thy Hands I Comment My Spirit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3788477ea5d4de14f45613ad725c7f24ad15c2082ee20448b8dd46de514ee30. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLE442140007.