La ciudad maldita (known in Italian as La Notte rossa del falcon) is a 1978 Spanish-Italian Spaghetti Western murder mystery film directed by Juan Bosch. The film was written by Alberto De Stefanis, p
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 0x3e07ca33f19f644659cf06318f7759af3d39f14a66391b5761766db95162db59. 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/4b2a6ce4-2aaa-4dee-94e6-d7f4465cc766.json and https://artists.proofprofile.net/proofs/artist/4b2a6ce4-2aaa-4dee-94e6-d7f4465cc766.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 0x5267125728afdac4ec48aa4b476fa5c3417989611dcb5753f7ed7e3f82cd5fa6. 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/QZNJV2265781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8a27e9932ceea0c772b4af1d99223c5f4d6f682d71f0e011e6e573c719383c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92392229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80998af297e390ecab28e9a65600a5f4d3e77dee6c3c9bafc7c985f8af041a15. 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/QZNJX2112425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c1631e2cf68a8129c76355bef43d5575e73a3368e966a6115129826570a903. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJX2112428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11d2a0820d4b8eb498969bfae2224ecd557b54549b92c627a181bc5a7d72dcb. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZNJX2112430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efcf3fdd70e9ecae2a3051378847204cb8ecce6148c7d47a699ef380bd25c84. 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/QZNJX2112435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4066f6c725af41a2e506b6f3804341e0585e3d32ec64d7ba45dc619662fedd5. 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/ES71G2034991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c5e8c7b6c098a75333d2baa9b3da11479211be024e17c755ec3c536e51e527. 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/ES71G2034992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3bbd3228da4ae750fa305a4ed1c4692a84b4456dc0e127ef4e381b280c0a01. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZGLM2327076.
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 0x4d8a5dd170221d92c965280a0b5ce0c3b8eb278807b0750e8370c4e4f3058151. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNJW2385548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef889545399c05325361137594e8f223dc8df0a334ff0d9b0c8ba070c4086a1. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZNJX2112426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef27a7ddc0832faacbd0057afeaf59f08a4429f02c082d47047c0687b3a81aa1. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNJX2112427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd53255fae79de78e8e470ed9fd69dbc10cee59ebca13646c9381d24bf761e2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZNJX2112429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e0f1f686f30373d821cd7a9533fcda441011146173e41860a12eb6dc42803. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNJX2112432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8613c1c59fedd7a29dd63371b4658051728b6650c576d3f4280d888cd5643f7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJX2112434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1b58d183473079f13a2b13f435be67b7720b059be94d486956e70430ae4679. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJX2112436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34b9478286817dbf287c8094f25cfa6091ae986696c34fc2ae080e9fbb77fea. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNJX2112437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f22218c74620eead63eff30702b1246cbbc0913e4834a9f582651dce1dd157. 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/ES71G2038024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb753a45792f47c17739559eb70e6c5865bc92002a97fbe5472681fb71a877510. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES71G2034990.