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 0x9d8b7f7f91df9059fcf57fe62ce64478250cd488490ceccd4cdf8a808fa6965a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2aa2aa4-879c-4ec7-9bb8-d437e389987b.json and https://artists.proofprofile.net/proofs/artist/d2aa2aa4-879c-4ec7-9bb8-d437e389987b.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 0xcb732bd5ba3581d8675fdec258bea70654acac25a4c6d2c91c446c5396baba8a. 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/ES5021900475.
Pobrecito de To el Hombre - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a256c9bac3ea0e18994065a367e5a53489191b29ca32b80e3250415d523a94. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ES5021900479.
Cuando Mas Tranquilo Estaba - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dad4f08708a9240a07d84955be4dac7a3e5065dd33b5354ba2ad50d96a8ca9. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:09:02Z), 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/ES5021900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6250175b3825c5aa39cdc6034804ffc94bc18a3fcd231b2800772cebbd56350. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ES5021900481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b68d0f3fb686c7b8e1f09dfc5458f644afbf2eaff6d6453883a9276f626cb19. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5021900546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41cefc73d899534f6d82ea853e9a508d90a3c183d7886698e5b064c9406ff1b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5021900519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d9c9e322a6a152ecbf8ba38ff281bcf9bcc73e40039804d96729250cc2a0a. 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/ES5021900650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2685046d878225adfc72979f48ec6533f4c34adcc1500493f6abf9ecc3858. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM6MZ1478696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510103bb37a64f9cf6373b5c95a4be9a25416aa9f47334d8452d006b34d2ded4. 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/QM6MZ1478702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d9c9e322a6a152ecbf8ba38ff281bcf9bcc73e40039804d96729250cc2a0a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5021900650.