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 0x663fa7586d3d5f7c3862f24fbf0a83f169e489c31b99ebf2766211363165bd25. 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/5a49a023-0703-4d51-92ae-cc6f8aa5ad17.json and https://artists.proofprofile.net/proofs/artist/5a49a023-0703-4d51-92ae-cc6f8aa5ad17.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 0x1cf6611e0cdb62ae3c855a23ca1fb1bd1730b5d25f5b152861c7e4e3c119a5c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2499444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2df5a43949a8f45b74a38fa81e15d29826361c9911a5a1b4db4299d85f92473. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N22457582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f929829490d1cd2e70afd845750c66f8a5ded87d76cf12436c2367df32144. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22413548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8506ace053c663597727d5fb8cb06ea8e768e88c6330501dc7e6ebce31d916e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2443706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5800e5e235b3ae86b59df4769caf9d41c69b7c4affa3c8965e400d5015a9f6c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX2489275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97845a6a17d117005c73b5cd19e841e2589cd0c1409a6bcdd54aa2f22a50bb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2472964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe867835dbc7114d916ec9de45feb7a3a2a768158944a9a856f782d0ecc2c52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFMG2322052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e85f9b3bcdead99a3de77b66f4ddc9538d81e1406e1834e00480c42605083e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72481890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70338b43a61391a194bf1c219c319ac06f36ce892363f9a476b68f62253a017. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62415179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ce7b0ffc01494b335306430c5a658ef962df5cab45c6fe386d15fb9de85379. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2512055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20af1184664a169fb3eb37aac320157bdfbc4abba0d9d7e8d60248a21dd184. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62233810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45fb8e0b81e226bb02106d29ee061776cf8a078706c0665827b15e04fb03fb6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMDA62233809.
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 0xaac4f655cb7dc78c6abbd07bb243ece99a0c041a88c4d6c588e80a3a640b6f63. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA62233808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b172245c17be63cca1db5648fb2b6308909662bd757b79da8e35115dd31ff94. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMDA62233806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d6cab2b139bc1963edd9e10f5e3b92d1485afaf7d40be954f3587927889f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2580776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ba13fd19c5aa3115b8cc61287424b3ca3c28ddc9db100dac813031f03ffe2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6MZ2510659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf0d92f5aa75a41a46153af8e9aebaa127300bbdf5a34be60d0be1fe1375d7b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2511968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97049ac77dae6f5521498b98d1dfa1fce1de32ef848f25b2d1884eaa4605db37. 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/QMFMF2468088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791df716f8cd533908d4effad15704337262df77975a6186a68b5afc3c8540a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2464201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0557f264742c0a46fee86fe86349001e38e09a4620f72c5bb6e02290b51e37. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2433481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6683cc6c202ee063aee2878c7a408229ea3aea2657693f4b36172b216359e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA72499192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe347d799dd257c9f08080cf9ab2314e119a6c1b5171545c9d7261d0d83705f16. 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/QMDA72470610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e7ca7bcac664bf3aa90f559570d53faaa5c2ba670aea4b1910e2f491483617. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA72414819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7277f45a95c22051eefcb396f19dff18b40e369861ce7c2054f099a0f5b85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62474291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106ca7aa9b0a8739042f8c6d4a74dc3dbc144e10d39379e57451466e27369dc0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92490889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3967b8bcde9f2f124f4ae29c7190d90943921307bc42b5976b91100d0b0b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92465839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22192b00ff99300b80daf86ee47b29a91cb5c26de217de492995b6bd950ddd93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMBZ92452537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02602d389ac1f81c31a54b5c8bf5410c13fb0fd6faa7995f5b8b1e8f385de292. 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/QMBZ92422132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a27332dccc4d73842cd5882558fc0cbaf0ed8c9c30db96b3d2058b6c8946198. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPLS2404735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650243bbf86b54da1cd01c31bacb2877208a114cbc4e91880aa5a57e829aab91. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42428948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5469f017aa6b8c5a2d9057201805502a3508565beb38cd852ed2394d432ec042. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ2468144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208b92fbc3ea4ba5bf7e9cedc6598e4d29fef63ee68e3e23db6facc77dddf064. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2429935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3209c05e34d602cce26552f89814f00770073d2459a35b93d3292de0f8d55578. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2445883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970999fedb08976d54cf9133a7fda745eb3ab78baeabcd6718d85fa9aa16aefa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW2430093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be2f2fad20052e25ded18ae402ee25dba5f88ab515f14e20d544e969fff4fa2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMG2312294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91ed8f7e8b10e82605b8c2f60bb72bcc3ad3a64f2d890e53dc3488e1f69337e. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QMFMG2312306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3defaa8b979557ee8aeaff950d875adb8d6e67ef6eb1206066739d5996ac98cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMF2353701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64a5f94577dda00fc28dd76536d9b6c6ca8895126a151733d08271241459d25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NO2DY2300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6a807d06b000b89a006cd25009f1891094accc9df9f4e4847b5ff92cc1c7e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOX8G2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc282f688294729950287da0a62fd4112d9292ea1711f15988b420685e6db44d4. 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/QM6P42354580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5b0307fac841752ca4ef407655475e0ece8ec200dbb5467ae2b5f21578002. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME2297467.