Claire Guerreso is an American singer, songwriter and multi-instrumentalist from Boulder, Colorado, United States, who is best known for her music featured on TV, film, ads, and promos as well as her
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 0xc7e8b413e7bf9483876fd6cb6d7185457d666635dc3d03ad67574e1f79eef257. 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/e683c677-69d7-41d0-8d58-28ce41d54798.json and https://artists.proofprofile.net/proofs/artist/e683c677-69d7-41d0-8d58-28ce41d54798.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 0x37159fb09f3b9dc1923f64915be8e4826db7586a231aaa8271b447f77ac3e515. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QMRY41500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6361c413bdffa17ced088f13b9607877a710ed4eeeaadd5e905e4772aeee70. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMRY41500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78ae0639b28cd1ca85fd72b3caf05365bc8381c6f530897264af3e7dbc4fdc3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMRY41600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b79069fbbb3b3f58e1b1eae00ca793bfdc42b7053a372d8479ae1aeafa4dad7. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USUS11500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3759c7269cd88204f45895eaf015c515e55e19875b427718bbb5b0ac79369f0. 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/QMRY41700328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fd768b151681779e45e00c884cdd97e14a1dbeff06f57f9dd015fe2b89710. 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/QMRY41800671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522751944aab7c5a138ce907e8a920a3437910fd3caaaec7ce7d21bf5e5a4ab5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QMRY41900815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58667e19b13b8fddf125d9281552d26ccb9e730ad7d292dd4f8194bd4986741. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMRY41901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc0b265db65f7963e44524522d74f089541750b70a60cfd9a98fbd6fcbf768. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMRY41900826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371eee3e0ddd03dc16b4180181f275335fd02765e95718c6cb78c300235a3fd0. 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/QZFZ42164549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79269fdb7f7af650dfe0da3b3dcba0de22556616a8274bf22cc0c19d374bd2fb. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ5FN2173096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa647d72002020cdc143f97c9e468528e35aecdcbcfd5584b85168f777af33b19. 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/GBRKQ2138238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32e8b104fdaa9627ebfc533b699e0c8eb8be27762ca8e28f51ef336ea2b5fec. 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/QMRY41800464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3e7f4bdc4909e4fc2487de2ed73141787d03c352eb165733db3d8d43acc058. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWDD2219740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7f3e8ef16dc3745c0605a230c235ec9f573a556c946a1083332ebc9adcc4ec. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZ5FN2355777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe91a483409d7b685f512916b57143bf1790fb32d12566dabe05dccf1f38f8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZEC2458797.