Sarah Jaffe is an American singer-songwriter from Denton, Texas. Known for her distinctively clear vocals, she has worked as a singer-songwriter across many musical genres, including acoustic-folk, in
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 0xafd77ab0ca82cc4286118f30c039fe4ae10a48ff4b6172b72bb51a82badd1866. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78ee83b5-60cf-462f-820d-f68735baeda2.json and https://artists.proofprofile.net/proofs/artist/78ee83b5-60cf-462f-820d-f68735baeda2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2adfa2d1166bbf8b5f89d79b9092de58ccdd20a87f02eb75e44116a6bc7caa. 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/US4L81004901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f258f54ffb8bf3f84eab1578a72fc1b63a75b3b8f93fd2d3d589e70bea0c91. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:07Z), 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/US4L81004902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701fdcb1593ccaf814b63bcc8273e78758c21b297267ab4c974527f9f7e75a31. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US4L81004904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfabe970adc6c361ea6263f011388a56e195ad639ae0affc07acb376ef62aec6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US4L81004906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ea9262e7d41346bd671ab39244e3c6f3bc8d312a87a7488fd97d387e3686e2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:56:13Z), 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/US4L81004908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c3e37f051beadfdb2cfbe3b912d267c788558f772fe1bfe2e29354dbb35ed. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4L81004910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c69a1ac2e085480b812c0b4b5b06bc73f8a34a35c5f367a7a820d1401d8b854. 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/US4L81004912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe044608b60716bbd2c8edc8d2e662f53a3dbedf7608ad479e6b12f58ab408604. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:28Z), 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/US4L81004913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015185cb7da0dcbc9ba152709d345cb2c5c022222a40c1c8447dccb00e55487. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTC60844608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ecbf1f29975c33db41a261a04b39a400acb89f2e6fe6704d94e49976ac29f5. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USTC60844679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86564c48a32f2424207e52c1cb10efc17491eb8b4acce059cfcad35b1bdc91db. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US4L81206503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43700c7888daf59b88d0836b3b8017e22f6c88ad3eee6a9797698aea0804fb95. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/US4L81206506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a38a0d0ee739bda46ad7ac6b3881ef8be7bfb2ddfb9f739167495744d72f59. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US4L81206508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b6e724997df0313cf6b364d9d4a054caf770f7ac7c9ad05c0387c9607c605a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4L81408401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf22fcbe1f642e5ecebfc0eedba94d77de668f0bc602dad300078ae2d5a3a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:14Z), 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/US4L81408406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bfcfb4a3ebc6d48cc7ab39974ed79323932c2a947d76ccdc9d7f10fcabea42. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US4L81408408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92658f8fbb8b7fb309d13ce5b3befb6128c9c2f9f45168e6e9cde54ee848875. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:05:26Z), 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/US4L81408409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d8dca5d4d177a6ab513831f8db54a967086e3651a26f09a6d6ff40d7e423a2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US4L81308101.