Ventana (Spanish for "window") can refer to: Club Hotel de la Ventana, a hotel resort opened in 1911 in Argentina Sierra de La Ventana, a small town in Tornquist Partido in Argentina Ventana Cave,
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 0x0e37e18f37615b053ca655bb035e1c5829b121527274a3c11ab481d626101d67. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/548cc0bc-901e-4bb3-abf6-bda197685bd1.json and https://artists.proofprofile.net/proofs/artist/548cc0bc-901e-4bb3-abf6-bda197685bd1.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 0xedbbc04cb61ff13f574949ca416f0216ce688aeebd33bcfff53ddcd40321e111. 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/TCAJJ2581046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784856453e3be0ea5d6440e255be0b4796c6e9d93509c3ab5a09e58c53adef48. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAJJ2581116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b2e5c39d454c1ce27c6721b7a828a800aad8e1780421e702cb1daf0a50c15. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJJ2581144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a642d3ff6ed28aab50f7391c1e5b1b4892ed52fd09129449ee3aaae21dc028. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJJ2581262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8cbd24c446550a994d0fe5724a0e795ccbda31f4c04be604056dc01028449e. 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/TCAJJ2582061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f59acac971dd668725151a10503ca3bdf9b56cf039c680afeb49c09d78350df. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCACY1721490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267a98ab3718f400f270b9c564beac19c5fbb712a8e12c84d72eb1d1dfaa3b23. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCACY1721491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed1f16d3c0921799d24e81f75b195f92cfcb8897415daf207b0b9094774e9ed. 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/TCACY1722197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd0ce691c747eb1289f4a3b7c4e01f701c8010da307e218c06ad6f93fa8837f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCACY1722200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8c608dc39fc72eaf2be2eb3c8e5a0b3b471c44e6c548f7b1639f2787e6801. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCACY1722202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888fc03ad0859c7c874a632780ac1a221c4a8ff4618286a12b38776e7bdb6161. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCACY1722206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9dba2586e79324d98f2355a4f6bcbe9c50d9bd44adba6426d5ef60defb335. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFM2154147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13df1a6ddf78759d7bd3d86320a5fd93bb09b66bcceeca314280a31c946d7ce2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFM2154150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d1cc1c377d09a148c542103da16405d077de14024d81ac079fb1772d433b9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAFM2154163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c8e294a0cbdaa6e8dd57ccc7ddb24533d19773b7d43e2d167881a65301aca. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAFM2154169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952b6987ef4dfc6e88ddea8d0109472cc624b3f6d3a1878ec21bb773c29d448. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCAFM2154179.
Saw VI (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84d9bc80835c4d0a03d3e9aa90b8a8e347fecab93e074cf45def11ff68a7ef. 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/US3440912820.