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 0x614e359df5bfe988f3073e67d3bc3cf33d8e4cd10915cc49834d7a392fccaa5c. 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/18b4797b-fb63-4bfb-b7f0-4be8ce16f4ef.json and https://artists.proofprofile.net/proofs/artist/18b4797b-fb63-4bfb-b7f0-4be8ce16f4ef.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 0x75f6468c5362e1968f79fedc816a253c8f03fa1dc70900b818bb9a12939ea72e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D1816514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70acaab1df72015da03e115bf3aa03eea288da11cd61b644afd8ec427a6a8b64. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUA1D1816518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bd94fbb65f930f9bf73fe029ef86024726256a683847fa8ccbc085eb53c386. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/RUA1D1816505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e5c35cefeedc96e7dcbc9834edbfa7e2d5c05f6fcc43b87e977aaccab20b2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/RUA1D1816511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993b98b48e2d649ef731bfaba83e5b85f04ed75bdd5e4e1dd915b6727f074e3. 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/RUA1D1816494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3973b38831146d5357debdbc28c324a17930aa26c4c9c926967bf5086a54b58e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/RUA1D1816475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad85a2185b8dc889f8f442838958ce3d0ca2a8a90c746afa70018aaac94d57. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/RUA1D2126570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac48c4e6b0399eeae6b901cfe9720740f1832864221fb879bbb3cd34e6dbe0a. 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/RUA1D2270465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08619c11d20a7671b0033c562c787f7c85159a534b75b56db31b699b8b21dec7. 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/QZTVM2445391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad05a182bb1b3c667dff91291f5e3e5fb4ed981c69c0fa6b15819e14cb16db43. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTVM2445392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb771324221964a3099e11d319a0824bb96ef300bec9a23b7d0e13aeea144649. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTVM2445395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd41fce32093234f02d8b51750e7c68a6c3c90128308d2b6e569f3788cc088b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZTVM2445396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325fc2d4623cb87f91272b36a387ff333d8bd72f677ee3aefc4a4765b1caaf7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/RUA1D2564425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60c17fc3f4a6508efe93edb0d72d22377e99b90e2096bfd9c41d9564055db92. 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/QZTVM2426190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0dd3da3cf0d06d10407db0142441d36ba7db919c1c278b85e57fdd2fc1b38b. 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/RUA1D2125683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105be89b91afc7af1fffd3581cc8acf9038fbfea2db75993115fe192b40c9020. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/RUA1D2126569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11efc63299839cb848f5a118b5f3403de19e77a32681ee871291e1d9cf861bc1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D1910048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc97e43286883df93c327535ed61d5a4fa9ab865f07b403286ae04955a8bbcdf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D1910038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45fe1f2a7cd5dc569293ff3a31055fa079d41f538719ef80452e1fab9d82336. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUA1D1816507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f989697d35d83b0c660d60aaee6bd3d18482c766b825021248e4278bdf13fdf. 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/QZTVM2445394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bd94fbb65f930f9bf73fe029ef86024726256a683847fa8ccbc085eb53c386. 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/RUA1D1816505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e822ab2f9e9db37695aff27b5422d9434826f55d137b6f9919bd304d9e2169. 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/FRX202413893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a8018344425552ecf1ff6d5df16dff5755b43da088a34d97397880cb1fdce3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/RUAGT2351756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17136efe3e9b1881f10585c4fa8ee646e8daf48d5090aea13185cb95b3f2258. 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/RUAGW2400482.