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 0x3633810ceeb2f2b88536562e4ede462821283979b770552c6bfc1998a6dae2d9. 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/c42a3f2c-1a58-494e-b516-11acbdfb3c2a.json and https://artists.proofprofile.net/proofs/artist/c42a3f2c-1a58-494e-b516-11acbdfb3c2a.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 0xd8dca533f958bb259dd2fe7a63c68dddba0bff9daffee5e2f550591fe46ecaf7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GTA010705591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7950539f4cbc805a2602bea0f80220415459de8ad8c8b973e0da5f0a3b362f. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GTA010704897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e7551b4c62c3c8bac4b17c894a0cf369476f4c9c1b4d6468c8dfaf54d0772a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GTA010704520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7795f8ea6413d23acf68e6ea717ed76b08f088e7cd285a542036a82bffaff98. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GTA010704916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897f5f27b4cd4783592d0b204018ae2e79874ea30f2af5bf6b54c762992e787. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GTA010703889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed72ab81734ec980227dac083d716b88957be18a2b281f819e211b48059a579a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GTA010705597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f20d9e0d8c41ef3ba78e4f13583f2a40bad2447e5e9fb9e9cb15fb5cf22a09. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GTA010705599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c5b216fd86ea37fc3893ea19733cf7586adc19eb97d7e398a16925b9a2e042. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GTA010703895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c24d331d70021d82c29b80f4fc7f0612fdfb1f4326f5fd3856d395d7f9c62cf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GTA010704900.
Aunque Me Cueste La Vida (Bolero en Marimba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a9a312f11d22112564d80d6f26c14bfb58a502ef54c1ef51311f72e3282d00. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GTA010704518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e7bb784e675d647e18f84195b7c7b02c49e3822ba010b55e06a0481d430c97. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GTA010705593.
De Que Manera Te Olvido (Bolero en Marimba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2207490f75965c55cda0feec87f1b210d1f2c6f4c125b5f248da29dd7f89c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GTA010704524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0e3aecb50924a169d4ff03e65d797afaaa896deffe91e7e89dbf7c00049f01. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GTA010704913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb218566e4a4ef0bc6f587ef081481a334edd1031e0399be13704f335e369bd2b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GTA010703887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907dae8e0726bfb4102570e074eaf06109b0afef487566efb2799bf16b293210. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GTA010703655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa511ef055fa608e014f91351f7a0663d8f4b1a2d3d09e4ec56a47e2b372cdbe1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GTA010703885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e7eeeba8c14e7fa24207d9c14e8469c4cf9e581f5e34172b29f0444e8f8b9c. 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/GTA010704512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbf9cd1392673df256b914a13ce2695aeea63fbeb72605d6a5961e1cef12e20. 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/GTA010703674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98703b43822ed7eb0988a446146d2c671cbe15097ed67d9dd543780bab10d6f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GTA011600619.
Boleros Usula #1: Sombras Nada Más / Perfidia / Total / Flor Sin Retoño / Sin Ti / Sabor a Mí / Vuela Paloma / Palabras de Mujer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c05fab2e588cb047ea662303ef952af8bf04c024acb596adcceeaf4a269aab1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GTA010704268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d8bedbd7b22908b3a3dc5f4e584cc4f9c449b54b9c488c890101dc3c577764. 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/GTA010704273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0629ed50936418f5e60cf49d4230cde808c3f648685760ec8bb504679d955. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GTA010806799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d7756a92e68f217b940cf78db620587c2598ffe485d88b1f37da9be3920118. 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/GTA010806800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4536189a653ff1ba71e6295530b3ee445368aef7b509409ef4dd8293715d84cd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GTA011200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a49ee69484201c591fff7917fa80c2c5311eec0bf8951c024886c7d7b41101. 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/GTA011200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4976333c4409ac2282fbc800cb18470616040ca3ec8003757b71e6777e3e7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GTA011200092.