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 0x3a94dc18dab6bf5a6eaebf7d187b4599d7ea990a4ce0187d1de98b7a47927ba9. 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/868af67b-0cc0-4a68-8813-7621bf9a9b2f.json and https://artists.proofprofile.net/proofs/artist/868af67b-0cc0-4a68-8813-7621bf9a9b2f.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 0x1d337e778fc9fbd17f8d2fdef151256c3cfbe2af5cc239d8ea55549e55d48eda. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR59R2037247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b8fa1b786f45cd19fa2d849504153b10cfdb9a44acd61ded9da182428182d1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA062074232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c69570bea66c74c2a52ab8c99e0d00123496b013b486fe2f7f6480b671b6543. 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/SE5752138253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216ffd39430729eaba1b0be590937db70dabb3366320efa8af1d796bb463083. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:44:35Z), 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/SE6A92133134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d386c375bb20a9ad5f021a1cc286a348a31c530303ff215dd3b0eda95cf7e8. 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/INR732100545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0125bb358ca04c0044f9147086e900725506d4668904ace10aed072942d6fe49. 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/FRX282290466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb9a4c559151998d1039019e27232063ace700ff6890ddc25ad6604ebf84927. 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/FRX202278373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427318dba4c0b8f7162a947d49463eec514f6b71ca9f4559c578d317ebbb0e0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DGA0Q2326362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830e615ea8e67c4215b2cd5a8db3d144a27960df8e713c19c3d8173167a94c26. 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/ING902400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a65ad85bbed064483c39d0bb1c858e986837220f8351654cabc8480c70b06dc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:50:38Z), 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/ING902400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2994bdf3c6358237d173eb350ced64addc4af1ade85e59ca867274ff8f2b0f8. 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/ING902400918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886b7028976c7393910c5e6c8604787647211ba96abbb6090bc82490628a726b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:50:59Z), 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/ING902400919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8248ce98a6e6e7b06cd58c9e12579da71d2f8cab3444fe1f355cd775ee44672. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ING902400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bcbb1444836ae8157db3b3290d042099ae067d632a8c525e9626520e3d279b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:56Z), 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/ING902400921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba5ecae5eff38cfd76b994306591a840212544bf56795153cca4e60d52c84e0. 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/ING902400922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342aca4f693119be167a4a65ea0592cb9893de04011f5078482ec41e17303ced. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INY242518911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e58426640f62aaf571530cfc7f32b7e1d8417589da42b2e7e7c4dd4657ed664. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMFMF2563782.