Punto Final was a biweekly news and political magazine published in Santiago, Chile. The magazine was in circulation between September 1965 and 9 March 2018. History and profile Punto Final was estab
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 0xbf5c244abbefa6f1a81145d7ff7d2c9d6d3f7477011fd9d952dafb7971eb07f9. 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/c39e7146-2a48-40b6-bb45-e399a137897f.json and https://artists.proofprofile.net/proofs/artist/c39e7146-2a48-40b6-bb45-e399a137897f.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 0x1344a18aa4ca4cf903d4006807f9a0fb909cb44f2eec788e7b7b26893a610e80. 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/US7VG2240385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b953f7db8e24a1ae22d73f58f906b11c38d92c289393de08ee31450f0ba31. 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/US7VG2273540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21e3681a38ab93171fa1379da99a609e2a2692d2ce11be9391e836d370e530f. 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/US7VG2273541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd679bb43bee85385e1ade71c4cc354e0e0d9ee96ec65bc556eadec36b90f3bb2. 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/US7VG2240391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3b2ab959e688801080492c36cef80f19a3482f401883475bdd04c77b839b51. 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/US7VG2240392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c541999b90a590c921b86cd630165ac35dd7e799776ed765aa1115c2a94ca40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2327669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa93b591fb4976f3a1fe4105b6bfb3c881f49eeb2642ec8e42c405b4b89955d. 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/QZNJV2100873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e085b4a97d6fc5fa040f79b1eca3e596e22e156385c995ccf8f4ee31c2bfe4f. 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/QZHZ31914022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa62eb5daf6c1203709ae3acc95410b382b10de1e96ab27c9731e677d99196e7. 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/QZHZ31914023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dceacff1f9f805c3be26324d76cd878ddf7e5d25c944585b8cd6b6c82b3ab08. 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/QZHZ31914032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8a8c7af26597b33533dd3871e0a828c5918978f3e6f8be00837fedca146c8f. 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/QZHZ31914033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc230603e5cbc0ea453489bc5a91a63de5ea4837ee87a3bc17167491a139efc6. 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/QZHZ31914034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8c81781cde47da46e9c3c4fc7ad09554048174314458b422919d52b6153296. 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/QZHZ31914035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c6045c132497e8783a7733fc7c7b71493ea11288f7938b51ddb37864a288c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:23:21Z), 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/QZHZ31914037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffce1df12da8ea856dd362800f7fd53378f47f1c29f9e59657530699cfc14ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ31914038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544de7cdb884ddfe7cb6ea964edf983157d5f8b22f4d6ca16716d775ea999640. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ31914039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e750f9de400e0d8115d8e7ad0fb632075407711d368f56c5240b70f3730f0b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ31914041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1be43137825a444c16605db1e5961fb48cabe70635502f848e06c7e583e323. 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/QZHZ31914042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf347fa8a7db4755652c0601c626d48ae9c0431289f71ebc9ae0b65571dcde589. 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/QZHZ31914043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03304627c74e790281affbc195c99022131b8c3394e9c4b55ba8c98e83d31c40. 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/QZHZ31914045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b35b19bb22a12fd2e334b07ece4860d90a5c7d3a8682e7f61ba9a74185f699. 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/QZTPX2116210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5c6f7e508dfb66fec60f9230f1af5d0207e66d20e5647446186ba51d466d98. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTPX2116220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c763c583a82ec6ac12502bd96a59c8365cdc55e0553f612dc0fa7ecad197e05. 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/QZTPX2116222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b1e7479af9d68a9bacdbf27cc293775a3c05f0af9e6ad0381c1b8b42e6480. 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/QZTPX2116223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c679aaf18b0eec6338815849e238016457d4337a200033270de7c419e50755. 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/QZFZ42506810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d858973b0923419d5165cf5d648d53d27712e47c19514c401f2d66a6a39037. 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/QZTBC2485412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432b61a9b5e0e643d56b9ab59b481713f66f576d61ea63eb30375d8d9a7e1e4. 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/QZHN72408044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9db091a3fd817e7c09355e320bc9ca0c0826370aed99a8ef3023f0eed5b0a11. 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/QZTAX2362143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff45142cc9ffb9e80d775c05f9ec9739b2f59af07add61a81ba9ba797caa03d5. 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/QZTAS2310290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f2a9fb98352e2921ef923bc79ef29bec8dde78ef42973424f8aa866f9243c4. 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/QZDQH2361692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf679e07dd13db0e610bfc4968395216b50bdcb62321dda6ebd289d90dc89d939. 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/QZDQH2350550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2cb40e2e1b4c38e7d03df829c1291504b9f5834737f989efa2bad4b31e5c6d. 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/QZDQH2273743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227d7aff03432eb8b144023743632f80f701c685fcb9e1d66f42ca90254aead. 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/QZNJY2295463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53af46ec5ce56567a545a92b214534b708d5a6bc5971d22cfcc31746c5c439df. 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/QZNJW2050094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eeda3d887bb2dc4f36287d3da14cf1846458dea92d85293fad205ea717e2b1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:09Z), 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/MXB951700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc6ba1ffcbd3e69f4260a393529a2b03fb441504ce1bd6632a766313b18eb3. 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/MXB951700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef7da5fad61ad3d8ec2ea8a8edc311a9f170b0d070d1f661f291a4e5870ad5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USASN1401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214944bee301555a62626c878c8bf01d42b5807a7a28dc36b60b65733e3d3cd4. 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/QZMZ92081523.