Epicentro is a 2020 Spanish-language documentary film directed by Hubert Sauper. The film stars Oona Chaplin and has been described as a travelogue focused on Cuba. At the 2020 Sundance Film Festival,
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 0xfcb96996f7aaa54df2e82e8ef47798aa14fadd7cdbcdc64e3e217d84dd7ea55b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901512c9-8e75-4bdd-8b4f-c1506705028c.json and https://artists.proofprofile.net/proofs/artist/901512c9-8e75-4bdd-8b4f-c1506705028c.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 0x30590704e35a11fc35054e013bf8460189781f12efd0826aed31b22f4ee1d2bd. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES71G1404761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd099cbab06939cbd923c6915e6c92db8d40c4f270cfe2242f01034ec34cd1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES71G1404762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc971464cef7fb93f3cc3da9b0fe8393e6421f2802202a359f69927efd83cc17b. 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/ES71G1404763.
Basta de Esconder a Mis Hermanos la Verdad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbd634c67721c68508517b019fc2ba34e0ba9caf1f44dbf60ac5074929d1694. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1404764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ff8103a0779d5c4a3f872f2db37db0d921e2e89e1619ec6ea14534cbef0cf7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G1404765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aee18ce639b416a87e3ee1bc106d1da14650a946b6478cc72d453c0a52395b. 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/ES71G1404766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460d7b93bc2156471a3a5da11e912ae31aa887acef2ac5699cf808828b839a3f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES71G1404767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a751b98ea41bd93ee03a3a9b2a61cf9b4fe03fca8677df08cf62a9a3d2f38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES71G1404768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489030cc9aa5d780b645f3f667eb824983254ef2ef8d966b42dc4b4c16a57087. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1404769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb03a94d6f837622efa6e35fe53f301822372d1e6d5954f3f5d9f8e0ff15afe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES71G1404770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20ae7bf35918e0d2e74e2ab8f4e63c2a38d037d1d31b6361f737ba4c138540f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G1404771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a82f0bb7b238deadc4ab7327c798a61ed9e5f3515703792dda5e75eb41d94. 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/ES71G1404772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87464d4d6d3f75bd54314323f8289950d6397185f214962b07d9cc9195e03f07. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES71G1404773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed5c29b208e89938a464300069b713db8e518d79eb1338f75993925f760610f. 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/ES71G1404774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231c7f64149d24d89acf40b81196ac8c49313f99de32992208b389849b6028e. 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/ES71G1309978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098b16a4a907fe23e13798d157fed7afbbf14cf0e9df15d047e2395d2d38233a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCDAF1765946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772ebfe9dc7111d673ce213910292c0b5598cd6f7ce6f8f7bbbb2820a50b96f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ES71G1404796.