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 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 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 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 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 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 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 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.
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.