thumb|Fernando Llanos Fernando Llanos (Mexico City, 1974) is a Mexican artist, writer, curator, producer, musician, and teacher. He works experimental art mainly with drawing and video and in the rece
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 0x1cc0b46f1823ca770231bf7a4d619ad740cc277aac9e23c13d2a4faa9775d783. 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/c1e7b1e4-1535-4bc4-9219-46478c303357.json and https://artists.proofprofile.net/proofs/artist/c1e7b1e4-1535-4bc4-9219-46478c303357.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 0xcf6d3cac626177b08c6d554b3f05b9f6c24a07b213bd65d515e74f98bcbb7a75. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2230242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07275dff7b1b2861bac03d15acbd9016bd851b56115ad29d7069791c31cb86. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZDQH2356352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bacbbb652f1df5222cd7acae2e18453731d283ad22ae2157ecef4c80df683f4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDQH2368130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63dc30796b4c2ca88dcb48c9085ceec8d440bcbb4da1cce0c55f61475a48672. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:07Z), 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/QZPLR2397812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917194883de523835674e479f8cfb8faa177e0806982e0f9060b3914aecfb9e7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:23Z), 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/QZTAW2323599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498ec23a0fe56da909acecbbc5aa0ef44cfeb6426ee2a435d9d743f585feb090. 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/QZK6M2424352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67ed1eb4b023bc077e80be4706708ab1efd17ab5af7051316604a84a29bf32b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUGBT2417463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b358fed03b33bd838822725dc64bac5cfd10272d062b11e3a4d9505d718e9. 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/AUGBT2446601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5bba573cb8c6da5f80044a08d7d98afe8a3cf3bda85fed7d074496fdf8096a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUGBT2448097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a28d0be421c2133ba2f1d439361e3a171eb28ea2dc819cd2551df896ab565. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUGBT2554253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd002d85c7b062112687bb6ab826a7c9de0fe4e60e267a6b279091c0d6d5dd486. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2291333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3eaeb52c70b190561bf624b12ff39f83834ae4ac49c7d3d35bb38d861704e7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2406712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316bbe7c7f492c58b46a073ae311483aa4e5959cb6f58491baeaa974eb48430. 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/USA2P2355845.