Sarah Davachi (born 1987) is a Canadian composer and performer of electroacoustic and minimalist music. She is a pianist and an organist. She is a graduate of the University of Calgary and holds a ma
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 0x8c31096647cc3f6d7d68d486d2954b850220cb932231c1ff270fcdc8b7237c37. 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/624d6aa2-ce24-4389-a318-d1592ae40cc4.json and https://artists.proofprofile.net/proofs/artist/624d6aa2-ce24-4389-a318-d1592ae40cc4.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 0x3b9f2bd2214d000f30c844bf8b1794a13184ff1bf1ad1d463f0e99d42bad15b1. 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/GB5P59700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2351a11830923eca85420407da60d969f08dbca11e6485c0ffc40a62c759ab. 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/GB5P59700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5809d721a0d4eb5dc7fcf9ee378f8be83f1901e32d1b15a4c2e48c6807379. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB5P52200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643b5b0c6553de481f2190ffb69344eda48633ea0abcbd2c078d51a4406c50e8. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:28:43Z), 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/GB5P52200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b5fbb51bcb910a6441f620e7df466e5a110a4148131f465351dc0d6c3347bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB5P52200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153c2b55a47f35b5bca47c4f7df0b31701f314d8402f0cc35882964097fe72e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEX262101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371d3188fd5bbdb6674e84a732999e8b3a780ca50b38fbe8b7e30938c3c182cd. 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/GB5P52100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ba5c01bb6215d891a72810f883636bd341e1fa77ca7c3871b93bfc80a37e8. 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/GB5P52100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bd367ee32aaa883855daa1dce0cd945ddc5488fb97f1d06b38e006bf7e6337. 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/GB5P52100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d09b1fd6bccbf29bbabe714dbc196dd3857566f03b827ef31f3d554393449. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB5P52100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc68b6a070bf658c3ee9255f9e3b688708eb0f280845a775c99cf203559b4fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156cbff78c19754f753dea5f3953985b8c3385cf4641b18e7651fd3e87e15c52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fb6a137b48390f76a8359ea68f5e39de67a262b8f7641abb6c4300241e357b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5P52100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94afae183398b9e1af9749c08388148e0c37c21da44f0733fe3e78358dd10c30. 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/GB5P52100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19d94fec1f070c8ed6c28431191cbcaaea164b7e7f4f6ec1c22aae1ca01e3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062baaccc20afbfa437e2a4de6d22735ca7d9ba4fb12fde737e0bb0ac6740859. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GB5P52000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a953cc480f5a84881fb4a97e99f4f4c1f3a2c913a35fe13af17735a4ea1cab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8756f1844cfb4d2e8f175fedcf547c03d1fbe32d8a71e5ec08cc1b5c0b001f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff832c119f4853175430a2ae95d2a561e6a726503645758797ec48f7dcf451cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB5P52000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6696dc21eaeabb5420793d302fbcd65dead0e72c130c7122b36821a3b034a04. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB5P52000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab043b8d86523a5a999b2b5f8ea68b0ef249a32a66734998d33b5e418b7c8ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB5P52000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d20f226a16750ee4f721f151e07f8562c7d7c46697c210964a593f9e0872a2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA2Z1900536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa88d20be18768a7338763dbaf2decb737fcb69be3534387025a469b772d150. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCPT1813702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8b3ec1ccaa938e89b583d855def5d533867f093e3e99251079470d2e05a358. 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/USCPT1813703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df895a644e32134e4da0d0cd70d2c4967a0fd3dc117c9e08fd7a51c1d47769. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCPT1813706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7598ffec2a73c94a1598be219acfe5367546a7e808e741166c5c99fe59a6a08f. 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/USCPT1813707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8964f62c776e82540c53f292c0712cc7a9a02011ed45eca9ac8a974d2e94a0. 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/DEX261800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffd3655c9f995ca021817827d33ffe81539a65f9fe9e30f3d3d0ef13b11ac4. 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/DEX261800145.
For Harpsichord / For Pipe Organ And String Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11bbe42e61c5b82b633b6543e3ab73463eb98dd85ecc1731282a2f70047e31e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCPT1610105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94e3f3bf7d868144857e91dd870a816a4f3a187441b54ab77543abc20b23ecb. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QMQQH1608366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a35db5eb8a8d8587b927a88efc45cdae8822e5558d77759b6535187682b2d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMQQH1608365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acaa3a6dcbbc34f90268a2c9c03222dc01ff774b5264d62135ab56fbf62754b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51551183.