Sarah or Sara Hart may refer to: Sara Hart (writer) (pseudonym of Maureen Child; born 1951), American romance novelist Sarah Hart, murder victim of 19th-century criminal John Tawell Sarah B. Har
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 0xab4c80b076e0a1141ce6feb484f6433c4ce702e87d18708f09858d28256d4981. 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/1287aa26-7852-4009-a179-04e6a7c463ad.json and https://artists.proofprofile.net/proofs/artist/1287aa26-7852-4009-a179-04e6a7c463ad.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 0x9f6801e7f06ef0719360d100f69cd22d596f6c137373b4b80163c83f0280019f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA4N0300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9289a37aa734f2f683ac8398ac2c7e94b3529b9d9a8388315c1a2115c937f392. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USA4N0400841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279e734bb64b4e773084c3a0d56f0dfd98c71b264e6e55951d3b9f2b15c9a07. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USHM81378517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aeee6f0c37c21ff21a11301c00189debf0d8ec812f20a5cf9c89418b4d0982. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM81378523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4e22736cbbaf1e129cdf41463649ad93840a363fda6ebaf5efc9554d45e00. 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/USA4N1400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26a9edb3c5248b267777d7af113f462eadf77b4b258b3c35ad32d40eb0005e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USA4N1800023.
Choose Christ 2020: Mass of St. Mary Magdalene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930045ad9ad74bc0e8bd710bca40ae5da74c9c3043ec2061a01f4469713e72e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA4N2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277482a1ebe74c1ab3c1cf00f0c579c2dbd7d48c8630e2f3d4476f2cae236216. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USA4N2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a02e795dcbdb9af1e8ff5aeb1990ad5c19635e5c6bd1882fab0c02c0f886103. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA4N2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68a3a5bca559bc4650df1832efa7881c175e83c2c8f974fb3e27892ebd1b226. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USL4R2371508.
The Light Of Christmas Morn (Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd945e3aeaebc5378a0232d9bf3218895ac3060bf884df205189dc6a5d1f409. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA4N2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8082178d5e23645fba0b6a1a39d57a1ab74da3c328c11fe9fe5de1c9c792378b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFN2423130.
All The Earth Alive Rejoicing (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ecc27fd20e83872522739ee915d2f39dd3ea7365f12603149229188507815c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3EY2562890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb932c75b5a3f7fe2abb3298d8a8d9d4148b0ff91eeed26877a2978c32ee6ce3. 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/QT3EY2562891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a4d37905e0466cbd70eb17acb1145f1a64a4e88e8aa16d71d45d0c904fcf6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EY2562892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87d4e9b8d4bf50dd7e984621d333476c20a56864d429fb19dbe837b7760cfed. 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/USA4N1303733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8d68cefc9b0bb870115ded1b87f164473277e2738e440165a4b94caa67fba. 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/USA4N1306066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66079aefb0317842fe3be978fee2f93613468431a47dcbc761f6303ff50181d2. 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/USA4N1303620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d91b2c50b317c8886bfd6b3932bec36498d9e4856ed98317966795618f5d67f. 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/USA4N1400338.
Choose Christ 2020: Communion & Eucharist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97366bb4df86358693e60ee659647984c372fb8f0c28e47bbebfc7cb8b6e5c2. 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/USA4N1900642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414b9b2e191cc5a0a3dcd442fa0928a5152db55a6775f0586e678d5eac95801. 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/USA4N1303900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90733288113197fac110932050badd4edb9cc51cd0e85edc95df4785dec55bcd. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA4N1301679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8875df6899475d64f77cb9dc2aeb946cdd1668ae9380d39e6277911e9d439da8. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USA4N1301627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f317e54aa3aa279d8f64a6989935f8d3ae77643cd9db740a6c93ec59dcd04d0. 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/USA4N1100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436e6bc256d4bac379149eeba3c8b71d1321cd2b8d6c0fc573c4317171a8a58f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USA4N1303715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6607b3563cc772d24fefd3e21d1e948ccc12f30ca239333e21c9d84a6dcbd7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA4N1303721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9ad69f8532f376f9f775e7dc744d6748805608f726a3996690318105c34e4. 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/USA4N1303616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014aaf6e3ca756334b912122a1562fd1dc40c27dcf8a6441cae8cb53f629659. 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/USA4N1301513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccef566432fd8f8cb3e6325f05bc6ec6fd5f968eac5d2ba41b5e82aebddaac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA4N1303773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9b7e715063c75a7a499efcb6b5cbf2ecb460a5bf04b37cbf5f75593dcf7ef3. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USA4N1000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58332537e022844fe28df3e20b46a55f679fb996f912974c61d9c6d04267d37. 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/USA4N1303774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74506268836c43624db2252241ed2cb00454b8f192bfcdd9ba5d26b32c90cc3a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USR5C1902016.