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 0x89f1b055612f9aa315322290469a4685a9544da9190743dcd641a7b1f971b607. 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/cc79eaf1-d3a6-470a-86ab-85382c4bac7c.json and https://artists.proofprofile.net/proofs/artist/cc79eaf1-d3a6-470a-86ab-85382c4bac7c.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 0x68b4aed7f7cd68f85a44b2d3b916f52c1c6f6f990dfccb7bc5a55e6f097808c8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCHR1327156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7072823202fee943584f890866e2ed5733521b8cdb516f9f3fcc6468c76cdec. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USCHR1326964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a1800dd97096dcb582454024d674b12b3b164616732278a94be2c3412649b2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USCHR1327089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3c6e1add92c7b9cb1b43651ed7116f096fb66205e63326989cb518e6b59a59. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:37Z), 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/USCHR1326990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff2c1db64fced89d6e5c4cbfb23745002f0fba7a1e6ccae55e3aa8d65e64d9e. 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/USCHR1326992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d7c894a46e563b1da8852da712599db99dc9786d1e298af045bf31bf76237. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USCHR1326937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053a12a2e59d283fcef236d9181e9636067b4dd9945a4e10e03541256420ae5. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USCHR1327136.
El Pregón Rociero. En Honor a la Blanca Paloma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a21d0e169110a607e26fc571da9f17d9b3b0c346af1e7d68bf104bcf7186e26. 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/QM4TX1543640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a63306a4cf7e6bd2803056f618e92dbd20557151e77146d86603d3bf91685. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM4TX1543646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e4440fca9d0691c60b1172424a2b596dc5c49a55fc1f076f44b268ced6d0d. 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/ES08D1700834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5bb4f17b61a3cd11c339da2acf1bfdb9967e6c0d85a252a618c0c13eeefe6e. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/ES08D1700837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa0418aa505e8539174671f9d9118d24e344ab314879db670fa8272256d23bb. 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/ES08D1700842.
Si Quieres Nos Separamos / Procura Olvidar / Dile Si la Ves/ Como Es Posible - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad109250414a09e07cc1a79bb0749a468cac8c1a332da33d9d246a93d2dfc9. 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/ES08D1700843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25316c954750ad845a2d318e09dc4e4be4e6fd4d3cd48352d202e3eed3fa5313. 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/ES04D1800865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a201d05123f44870c1f09ef599824271decddfef58f37374975d505eb81b88d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:15:27Z), 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/ES04D1800872.