Perfil is an Argentine weekly tabloid based in Buenos Aires, Argentina and refounded in 2005. History In 1997, the Argentine publishing house Editorial Perfil announced plans to launch a "super tab
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 0x33eed2fb95349cf6a03c20ca9fc82dab2deefde09cb7c2ea85a037a941698041. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6eed42f9-4b4b-488d-8bae-3b4ca4df80e0.json and https://artists.proofprofile.net/proofs/artist/6eed42f9-4b4b-488d-8bae-3b4ca4df80e0.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 0xf7973056aa0a3e68a3f40c76ad1176b893c8debd072d21928b6a43c4d76f9999. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES18B1500486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62ae2ce458e346f79aafe6270d49e28e241dbe578fc89d21c8b275748033f57. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES18B1500487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d212aa1c6f0b617b55e5f538f0f203103ed26e6897e01d676894ce60aeb4e4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES18B1500489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d13744fa74238efe6a77f1d88c4f65e7ee68077c848f5b9c7b00c4748b8820. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ES18B1500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c56c5f246f0ad4d69785fcf2cdeb02e160b5f95d698f67a34fbb5fb5d66260. 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/ES18B1500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e6a202d08c8a4d20e5c55c83dd4b762a4c082828034efe3e148820debf00e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES18B1500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc0f337a30e30c5e832ca869a102acc7b158b1238dc1a1b9b2c8b494e91d0c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES18B2003407.
Selección de temas de Luis A. del Paraná
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb820297f1e73ab571055c266ba3f261470194db0bc2c152d53318f09b0164f72. 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/ES18B2003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db3eceaf84104b10f87e9b1f49591676bfefd28874c4fa0f229e9d73c3ec54d. 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/ES18B2003409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf2fe260533f2469e8eb3f21c11bc4fc03b2e8839075d83b53afdd1d958081. 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/ES18B1600198.