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 0xe32df54287f3646cd7e11acdc848f1574ff061917791b34b536718d69e17014f. 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/e3e83f48-1268-49a6-8af2-cf3e4fde6e08.json and https://artists.proofprofile.net/proofs/artist/e3e83f48-1268-49a6-8af2-cf3e4fde6e08.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 0x2279129ac3b4dcfbbd77e1f07f7b23665e3a596603824331b307adb09717e154. 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/RUA1H1768411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e807f0daae4fd767b5beae89e447648bb073c64cc0d22bef4c197470a32c4ed. 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/RUA1H1768406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960cf5e68bec9c36b469fe3b69f443cd483d527d8aa552423de45c5af5453bb. 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/RUA1H1768232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b93143eee786659c9dde8a3bd9c7bf949aad4e503df2b8337ac685c087e6bf. 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/RUA1H1768231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169061cf6e5a18618e9f303eb9909e096dd8c94b4b04b400a37ab25ad9592d0a. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/RUA1H1768233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab6b19db38e3e5fba1b508167caeaceab8691964d59054a6bc6c5bce865ef1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/RUA1H1768312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd597bd740211a920026eddb5abb373b91fc806e7e82099c15b373dd68f008ba5. 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/RUA1H1768321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43edd6c2f72be574969e2a4751099a55454718f05867c2981a84183b73e3a934. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1H1768320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b89de7a571145da78be4c5b902fb2ef4b1bc7d5972182673802e6b02dbaf05f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1H1768318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda70fd314fa595478c2006e7e046e7c83c7790b1ac3f2d48d8429cd2c38b7528. 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/RUA1H1768314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72e272dc2ee2be0b7e5e936c29574495df35a6f7bd8820f44df1eb627a5f01. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AEA0D1997099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8017c7f156fb9e16678a03c56502ebd1825dc73978f5956a2217aea607c5dc12. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA0D1997100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a4b2be9fb024cb0d8317fb88850668a7088bbfc12985bad7efcc2100a0ee2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AEA0D1997101.
Quiero más de Ti / Así Fue / Soldado / No Puedo Vivir Sin Ti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470d1545b5d3f04ad718bf03191f2c382fb92be87baeca801afc6952f44f0e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA0D1997104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc816c36937f6f5bad11d4efca15fb9608b84bd81215677901679490e53960186. 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/QM6MZ2208635.