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 0x35fd49c0e243e8f444507de46d1693a9777742a83aedbccab1951c7b0f293168. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e78fceb8-6a50-40ca-af9c-431b4f520d05.json and https://artists.proofprofile.net/proofs/artist/e78fceb8-6a50-40ca-af9c-431b4f520d05.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 0xb24be89f5e4523f2e560acb5178db3c44914c2c56ac233cb6371d80abd6e5656. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES72241092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2a215f0909f95c26d95066b5b6f28d688836f7f6627c043ee91b9c7cff9d60. 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/QZES72241094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfda321a4d918540c61f38e36dc2a9b9bb83bae78a8ca6909b1455abcf7a7a2. 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/QZES72241097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a81514fc40e702373a58a14329574032bdb9df8f1d038d940494d42716b017. 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/QZES72241100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d578c40f3effb314a7aea3a8e331939836a02b8a48bfc957fd1218dab674d. 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/QZES72241103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36488094caa00a34a95d9b859c43ae47ed6978f9283475c5a910c4464a43e2c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZES72200784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63023eddcd896bfdfac6edd9ca5d644fa368924b78a04b5ec4ec6e1c4050b158. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZES72241098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c23f675450d829ec62f49cf03f8f22b75db6c066512234e2d99cdaf23e80b9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZES72241101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509bd08325913c33afa6ea1ac888ddfc4508a6e03e83fb23635a5d9f2daf078d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZES72241102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5445e30586aeb6620fe5481dc9507fc822dc5e16805be59d0bdcb230d52e9b. 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/QZFZ62176642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0bb30036e394c1816f65f2b80a668499b5bcdb2fb577ea23f670b833e45cd7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZDA82032085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0212c2a683a4725bc24d1baf0bd41aaaa1e681da004fa5a1f3d28ab4ab1eb70. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZFZ62176646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f9948ed8489b37fb9fbe7b409fd2d5cbee3da7ec211eb759718a699be7e423. 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/QZFZ62176649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea01af5fdb05651f710435483a58d301394fbafb360aa5d3a4c283de75afa59. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFZ62176643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ff4de4b2128ee5b8bd4a9de2ab7dc52d9355560d2c411285b7a0fdd3725907. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZFZ62176644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb724f56fe079d43e328136090c526fca1c8ec67ac36564dddd37625592708f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZFZ62176647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aacd4417b903b3437aac268611ff5f488c67f3e161ecffbc342696ba2a27eaf. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZFZ62176648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7677279e2d319c3c19e4bae3c50ac132dbfcb9e640269a08045b9993bb7846e8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES82083994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819986fb1d7b2d980401b427c4a7456b6cad2a0f1a312523d337380b37408a03. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZ4JJ1803927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e7ec90d787ab4cf3d9573822c77049e9df0752aef088d4c336e8a413982a57. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ4JJ1803930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26237b43992fd15ac576bbf8583bae232403ac876c25d644410f00b09280bc3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZ4JJ1803932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a58f7a683d688ade3a5c3132ff45e9caa97ced9fdace6d3ad5adad30fa587. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZ4JJ1803926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf514db25b5e35caf95901d4ebe61666553fde7c513f2947fcbcac5a40cc68e55. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ4JJ1803928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390bf1e258f75dd75ca03604d8d32aa2e17a7ccc45806b4a8346bd29abfb993f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ4JJ1803929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9947a2b2b21e2141459495bf5df7001dd4515f90751398ec7d637c1d543412. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZ4JJ1803931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5fa11312ed89921b55d5d8b3fd57b7e31fdddf7b35f963a6f229e294304777. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA71887316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3d264ee6beef90b3746a10fb94b02265b0c04c6c8f0df590af9e0c67489b3. 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/QZDA71887318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f4925737bc51085b4026dcf12c0dfada55aee64076b7c1438efd88aa4fc49. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA71887320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95eb99f6c1569e3ed1bc9363d813eb6cef71b7e8d8f2a716673c9e98381b30. 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/QZDA71887321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185beb44ca38df433e01188f91a3bc472e63475a8cd52aedf19570d6a6618541. 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/QZDA71887329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df3bc03584506a0eb5d77a79b1561d9082a585d9616d5ca8b1768e054c19c55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA71887330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea66657a04dae8781fc5c64e11a9c5ffd6cb94cf15c7ea1376771f1667ed092. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZDA71887319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaf73a85e0201a493c73af94705aa182eaa90b8ea2d592c44b891f8a108c805. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDA71887322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc418266d53885ad5d65528ed502e8d8003d934b31acb3af6f9b6bd9a058fcab9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZDA71887326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a384cad2e34d798e3745ec44c9ea008dc6687a3858ec98cff3f0ab4c09720e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZDA71887327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dd7a80309fd3e45d03f9ee41c00b28fb099b58cd782a3087a1eb2ceb026289. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZDA71887331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c728e77dc16f64b85b780e6f4da9e5146c34ee19f24c89661903563ce1f23ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES72411281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87d8da3552408186f2644ebf12dc1c7bea02e48e1f25bd45e3d46ebd79c9b69. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IEWGI2330289.