Sivia is a town in central Peru, capital of the Sivia District in Huanta Province, Ayacucho Region. It is on the west bank of the Apurímac River, about from the town of Pichari, capital of the Pichar
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 0x177265bd228ed6bfbf2123a41a5f3e15ad738184f384ef29bcbd057caf9deb73. 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/233e3e93-13e7-4cd1-9276-3daa54ff9b64.json and https://artists.proofprofile.net/proofs/artist/233e3e93-13e7-4cd1-9276-3daa54ff9b64.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 0x87081981d9eb3ae0afe71dfa6809b23da6af0875252fbcf0e48efd8a07042980. 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/FR96X1913925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec3193354b28c3b64a6cd71aec6bfb1a844310b857cf92105d8cf256a9ea7e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR96X1997052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea839002b555dfa9b923989d3e4862133bd469186eb576c983373c4b886cf0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR10S2080540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb664bb6b133c1651f2d608f207b4602a97c59b3e5fe0ea563a51e91267b2293. 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/FR96X2089974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811efcc759078bda1420babbcd5330ca1f1683cdf047de7f6990fdbfa509926d. 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/FRX282068675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2864234ba4932bf72cc2851722712a4960940e8c6be130aef1814c34452337a4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX282068679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4406649a59a896fb2e40a695556661de121edc6541cea7317e682d60050a000. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR10S2118070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b0988d9a7b07a6c758f1f90106e6ef14e100f5ba254ee089abd35497286363. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/FR10S2118071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0178512944a2dd7515f3530de3eef6eaf1bdeb2b3d557797249cef3a4a823477. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR10S2118072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f2c00f8e62e7ad962c26d789cd76a082e6695c8dacf00538fdbdad1441a547. 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/FR10S2118073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454a138e50e2104380953c664622a5643a1581b09dbc6079313ca3d3df88dead. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR10S2118074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071d8e4eacaef38cf6532911c5dd967285e2a8932247fc090cdbcbf5f4737c62. 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/FR10S2118076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee46fc942201ddf3b84ab5c87457c0f6a1a2fa181751f905b870a4e4d0368b56. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR10S2118078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d1ae607d74d14d99e1755c21579774f7a6310a81accbc8a43c1026d50d1e5. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FRX452130710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c9f01041bbac43eac43f458fb1c1b51abe685b2453497e1edc13fc93ea6c61. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR96X2186865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb2e41efbd72bdb76ca381ca65c7c5c4ff272f7310b1d9e60c6b1c4427c37dc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR96X2234979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a08c701a77cc0a3177a4c76470e7a2f19b225e08538ac59730ec0793cbd808. 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/FR10S1942784.