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 0x72b26d4a8aeddc2da210b2b88717c0c2acf0a77228003bec81a80d79db50a134. 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/6761c320-a1c9-4a7c-bf8a-92fa1f3b52cb.json and https://artists.proofprofile.net/proofs/artist/6761c320-a1c9-4a7c-bf8a-92fa1f3b52cb.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 0xf88e1e6a9631adc84f472bca280ff34290e393f37eae52964378e8bba42f640a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/NL8RL2314064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40db64231650656b5c0a6509fbd7f4ca573506cf1579b10cca57e25302e359ef. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/NL8RL2314056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c6268d3bb778cd6c151f6e81d8c31ebc8eef8cd56cab0c925b4f682c886fca. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NL8RL2314058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd334bcb9789fd00431f218748cb1e574d20791299f404bd0fd8c53f300a8374. 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/USA371119420.
No Llores Corazón (Pasillo de Ecuador version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2644f5ef8512a93de22979a56437fff2ff38ae1d9ac00f43a675742dcf7ec. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/USA371119418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c189ba111e120a2aaf036667ac2edc873879b404f3cf5a4a51d7cdaba8a6622. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USA371119428.
Riobambeñita (Pasacalle de Ecuador version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ac662e92341de0be140916b42bc5a91fc76a2f4b4280e0ad58c5492094208. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USA371119416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa8389ea4a321e521f70c8b22182d93c4b2b0d47a8ceaef04a6597f91ab105. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA371119414.
La farra de mi compadre (Albazo de Ecuador version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c7f59d2287871bedb808e0b0d3365bd3b5c4261059cab84e4376248849a13. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USA371119413.
Sangra Corazón (Pasillo de Ecuador version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822734f9c7a0a11bc60fab37fa4d549d50c33c5296b5dfa8194c312d3c08325e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA371119429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c189ba111e120a2aaf036667ac2edc873879b404f3cf5a4a51d7cdaba8a6622. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA371119428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ac662e92341de0be140916b42bc5a91fc76a2f4b4280e0ad58c5492094208. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USA371119416.
El Pañuelito (Albazo de Ecuador version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13070f79176ffc1a48837496b0bbde7373dd0c37b59f71181e3bb2665b37b9ae. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USA371119424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa8389ea4a321e521f70c8b22182d93c4b2b0d47a8ceaef04a6597f91ab105. 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/USA371119414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c7f59d2287871bedb808e0b0d3365bd3b5c4261059cab84e4376248849a13. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USA371119413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1cc8d89a4a1e8afe516429567547c7c4f76cf6957be8dab4ebde98bdc93dd6. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QM6N21404567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73181a5aded61328607418d08c73b627b5479a2838e5aa73e9b91e9e14032cef. 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/QM6N21404576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576bbbee3234f0a52f1c54ab9a7cc7a8bcfc3223198989710843a6c3b278bb5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM6N21404578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa511dfaa7a12dbb630ed1f65ebe1e6a4ca64fe94e25acf1a3c7e2ec9bba3223. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES71G2119325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bcf9a7efcd3ce0b244d6d2bc43a0cdafbaf8ee29fd37956f5da5d2019e2381. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/AUMEV2278723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2714ca4c4ec8bdfcd9b55f55b312ff01b930a5a0a78429f4dd215c7e51a4c322. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/AUMEV2278725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c7d903c85a692b29eb89b833e042332788c39f6d71117c6282740f450fc398. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/AUMEV2278730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5258a1f7bb636654b41373c11b2642e1f2861d0bc956348b18df66785018585. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM4TW2029817.