Sara Ullrika Watkins (born June 8, 1981) is an American singer-songwriter and fiddler. Watkins debuted in 1989 as the fiddler of Nickel Creek, the progressive bluegrass group she formed with her brot
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 0x428f2a436319fde9295a34a2bef3f2765d0a2a8a3042da0f25ba1ac39cfcca83. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bab1d82-bdee-4f7f-90c9-acaa5c8e4b98.json and https://artists.proofprofile.net/proofs/artist/6bab1d82-bdee-4f7f-90c9-acaa5c8e4b98.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 0xe083bf7d4a99f43811707b89311ee89d575aba1c04d1269d7733c5f6ed0498b3. 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/USNO10807857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59529c0a6a3a393033de22037553c07166c97d648dacf72933b26d622a09912f. 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/USNO10807859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd2cc10b021b9a3728871ccabde75e1a479e8de739f1afbf122aa48c9bf609. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:21:39Z), 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/USNO10807860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff4cd9e9e3d7b24c3a40154e611ed603bd8cf471e949625e6cb80a4f99e525. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USNO10807866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07685bee6951c1800802ba9f6f6114397d5b328aabd8a2caaf47f2299553ee4c. 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/USNO11200065.
You're the One I Love (feat. Fiona Apple)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47b553bd4e89a38bf6456cdc70b244565fe8b2a4b7585392314136f202bc380. 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/USNO11200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4337cec4bbb4dffe26895db224e07c6542eeb1bff6dc2ab114cad0629e233d2. 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/USNO11200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e1a828b1b5e3c03e1b27f9efa8c06d736d8826f1c20707d966c1f8c03fd2dd. 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/USNO11200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027e14556a492140b3848c1ed3bee6bcc29ab6b0376ab80b349045bf2ba3a28. 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/USNO11200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebefd10059d58b203745979793a9b59c2148f0e5a5b9dd20e23eb149e022e3d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USNO11200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37eec841781696121c82522f3b91ff0dbf73c63d7ae170c133ef4d4cede8426. 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/USNO11200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7b6e35f8638b0ae877f763bc314ff71e17fdaa8091c589f8345cdd86fd926. 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/USNO11200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8fad70008532d1d3a64d142c11b566facddd4912273e65cd93788ef4b9cafa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO11200064.
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 0x3f5d069006cde711f47fe322333c7a211691df47295a53743d1adbe4378664c3. 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/USNO11200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8478d0719b7b74abe9da49c98c3faf6d2484769825eeae96d547e9f7065370. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:20:47Z), 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/US27Q1635110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a707a5b6fffc313cc35711ee5d23c32665ec6aeddb2430c6d4824138318b70b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US27Q1663519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b904ffdc387306fc1ef300c8a204eb905583d18de526eae24f21248cb8c71. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US27Q1663514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b251ba1b3e57bc47e053c41b4acd22003f49db61f66e274c6748c3496919ad. 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/US27Q1663513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df4fe4df533d173425ee3a753bbf5595b081c6afa60ca8899c72989b264fda. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US27Q2050501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5aeaa2469549be56baf7c0a343230a476fe630952ddd507e8570dc998f674. 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/US27Q2050502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7bed2f628161ef843e431070822f05740a573c9a8ca1e707b1163ae034b5b4. 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/US27Q2050503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eeae0368d4a0f7440b0e34edfa2977d1da77cd98fd0109a19abf50104a6116. 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/US27Q2050504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1651559dc466bc40f4b5e0adc76bc24bb5178d21e2f1ec6a467dcd2157a7738. 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/US27Q2050505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308efa0a76e5b2c132e398db680cdf403edba90465cea3680e23929dc2274f94. 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/US27Q2050506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648bc3b25d070278951a2b77567928d659a7e5a0da54ab37091995501b7caa36. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US27Q2050507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eace1daf5ad2665c0664db767c6c18927ca29e8948d8d8951f84046b58c3e2b. 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/US27Q2050508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b7902cf77e12cd95880fe35335dffa1402ab233e7db2001cc5f3e032e92606. 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/US27Q2050509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf879e00471e4c68d7e5e15b327d92cd3823309f6ed72331c584379a546b24399. 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/US27Q2050510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe076ae367b8718d025a47e3f6e6f62180b370a96a2cb8060f762326753696e4. 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/US27Q2050511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb029092f8787d65806072af3ee4830a66ae48703c65fb63a13ff21df7526e7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US27Q2050512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a8cc4d56449bc3c0504dba63928cfa9d71194d2447788f381a585285d03e79. 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/US27Q2050513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae8ed1c68d15a1ee0ea7b5bf158663daeedcf8b17d31d9585c26916be4e06e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US27Q2050514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530e3f8dc9f768049f20f7aa04fe825d6cb2029f070d998f75e1debb3292e97. 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/US27Q2050515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c456b81edabd9e1a4df2e052d417def2f53c5c39c666784204ef4d685d417. 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/CAN112200530.
The Best Is Yet to Come - The Songs of Cy Coleman
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9949032eefef97e18af85624740ea204d973567cd7de333ac5884fb214c00. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSNN1010011.
Broken Hearts & Dirty Windows: Songs of John Prine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa143a62a878eeb21d0d6c16bf9e6d11ac9b312aecf23ce5483c41a9a24018c14. 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/USA2A1004209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc049052b8ee98b84e19826abaf8f2f086eedb485ed6801860b57090289b3a2b8. 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/USRO21701150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfec44d51277a69ba32858b2af58b50a10eae96f98f232b0e7fb61e33ea48db. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRO21701151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7499f40ea6e9776e427d9386a47bb9d96f69284a42bd4fa010aaa63a9f9cd92c. 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/USRO21701152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d0d2f801e2bded62cb8fe97f936c30b4a73e6c75a6271da6fcfc288438754. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4ZA1200012.