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 0x779afa6a000604d27e4e71da88c0e807e290e9b91518453260f9e8a5c5cf63f8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/744e0f29-218a-4556-b1f0-dee598189d40.json and https://artists.proofprofile.net/proofs/artist/744e0f29-218a-4556-b1f0-dee598189d40.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 0x139a3343ba044440c41ec33dd054c1f289cf99dfbc3cef62dea96a37632be03c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2415327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e376b11d727c5b83c6c3c4a1bd7c717f67892fff012bbea36a94b6e69f57a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZANL1750749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a98fa4f7d3e2198bdbd1407e45d82ccebc3c582caf5fbb31b80060b64f46b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZANL1750751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76347f8f2b373e52e4300eb183601d281ca822095c9953216c3340028d3ae702. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZANL1750752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50218919f39b2d0cfc91710416c76ab87103745ec9f4f4b396ee2a8e51735d66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZANL1750754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482270298745a858bf4b59ae61a54e6cb44eb070cbae5bb45d7501e1f321709. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB1735709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5be24aa3be0c70c3a3dcb710851f6df22d22db750b1366f6a9c26ae4d1502cd. 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/QZANL1750756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4269d810a8b4e301dae616d91a7a5a79c02497e07eadff8792f092db42cf8e3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB1735465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be6cf056cd32801e8593f37a07771b2cf676a80bc51b8708864dd8006c6a6ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1735474.
De la Calle a la Cima l Mic Check Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f1628fc878b9c38a596c90f852d446dfe30103acb223dd4d28b8a39e6a291. 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/QMANG2242318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe7fc6dde006dea08207cc2c582ca71238f8980fc1cfca6f874b273fa656a06. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMANG2225400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7719c00e13ba06937dc7753eac96c45207183483db209f9fa01ecb8a7acddc5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2313887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a53293072ddb610d9d7d569c6a0a314fe7e181f06c188b25c851d66f5036a0. 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/ES71G2302892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1c0317df50d8bceeb29082bd2847d76642f23a11c50dbe24d7f155d325d8c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2239266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca92a0f25334c9089b066c839267b2993a4e441268758957a073af21842d3b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2243887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacf5096189499fd29ccb57d1e13461792ab7a96d9cdb8773451f3caee768d66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2239397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7631230640ad279c249c72f983e46ce2f9259ff1960029b6d4e88997a8c45. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2216287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dee121ba8e3322498b839399f58d63c3397916e26a7c727fa2ea7f8a24870d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2216286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f67f00c1518e085a8efa1a4b9f9e5faa8087c1efb0fa0c51662b430c897ebd6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2205742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a04591c3dc10bd030b98591d43fae6e65c1762da3440d03f16454c49228774. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2146427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56952d987bbe3126ef4e13d2c39dcd500c21ad676d548acea07c78480cd8df70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2138536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d65cbccf6065d92d263f17548d22995c6fad5922415063d96b8a4697b04ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92151703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf376e8247613aa3deb2f560ebf63eee88cb1db9529022135ff41df4453e54a51. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2102978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71131cbdc39b0cf4f61c650bd91a4691e4de8e191aa7bbbe1ffffb88cc8fa88a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2060721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd73f705fd2fd3ba15e423b36ba977b847135e0ffb5b1b25a195f8a8c1ba4f93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN62033067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27277fd75dc49830fdb2f53bd3a8ad4f3dfc8663e5275ee84a468dfb39b2ab2f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2544360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fdf979af6017ac6551bcc0d41cf3b43dba0b53806e93af84a8c6b84413648f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2518276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3591984fcddea2d3a66500a55c19e8e9094671cd2403d714effd945819738. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2503490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cdd4e6235f2d528bd0c12d839d8709879b2fb36ddf7de55fcf9ae59dd0861a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2486901.