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 0xe173c573d87cf6fa851f94df8c903922b07faadedb964a38736beedb6d67fb7f. 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/fcb2d198-793e-49fa-8825-3adc54504514.json and https://artists.proofprofile.net/proofs/artist/fcb2d198-793e-49fa-8825-3adc54504514.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 0xc0d8edec11e7fd16896a822c2db3e9fc25d1e3d35903a1387a012b211a53423c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLM2001180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f847f9dae517e240b919d15c9544e1c0bcb377c793598b09e77d41495e4ebc6. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZHZ51940376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce48a922bba891293274b4dbebd6b30542ff522365e2610549e6e50ef728a553. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHZ51940380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8cefca9e772b067cc723467df3526b0098aa68d5dfff79c993f948eb27473b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHZ51940385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735e29803598f38d56da87f06917874c48cce86fc9838b316f39ef91bd7e70c6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZHZ51940362.
Colección Doble Platino: Hermanos Martínez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccad843f2121bbc6437a9a395fc4543e660247dbf7cbd1d4cd42778b598674a. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/QZHZ41932060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b0210f69a5202adbda6e4cb5e67de12b42155fb0b6e05982af0cd297fb7189. 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/QZHZ41932061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243092b44b4382895e4e8b377ca9d3f1121d48fddaa70a8f29ddf1aa8e4e496. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ41932072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed25a69338a43838cc961af739d6fe5235fce5b41f905c2e64ea2b7d122e85d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ41932064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76b170e427c8105c56b77b6f1ac7f5f413ed8f481233985c5349d6ace909bd. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/QZHZ41932067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccad843f2121bbc6437a9a395fc4543e660247dbf7cbd1d4cd42778b598674a. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZHZ41932060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c52193f300de1bcf6014d82df58d39290a9b40e9d758f83a0912ee5700f751. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHZ41932078.
Doble Platino: Hermanos Martinez, Vol. 2
Doble Platino: Hermanos Martinez, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2b1cb8c9b0f3c416e920d6005c27564303ac81f7f5c46de68740635bd2a0d3. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZHZ52094025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05773bf033ef4e0bde76d917a2d4edb6d364f8461b99295ffe054ffb04dc3c7a. 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/QMDA61590480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4debb0299d65ec197f1a4e0d34d389e00300ce8d4c3b804c709478cf82619c28. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM6P41550899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079361634430d1ab5d0d81017e7674cf9b13d983b3b37b10deb0ee2a91acc05f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QM6P41550912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57d59e9e6407f1c3340764763bce6fba66b1c8db3f483372f74aa623657642. 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/QMDA71868090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3657f2e1dae6c8e4256ff39b02194d8663c365c622e76d4ca81f23acf6fbe. 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/QMDA71868096.