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 0x1b5fd281398bfd3316437aece125667eb9729e3cd3289b0569ef210b956c1333. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39f24265-ba9a-455a-b3e9-013beceab5b6.json and https://artists.proofprofile.net/proofs/artist/39f24265-ba9a-455a-b3e9-013beceab5b6.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 0x9cbf8b6714cbc24e28f023d451c402e074c8ea6c9bbc239a127d7b512bdb93b8. 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/CADE60700781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca80de7d932125c6c42271927d16d185060b9ff416166d41820d930b978022e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CADE60700782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f010978b78e3a7907ad0442011a1fee176aa353f8df5654c47873ba6738867e. 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/CADE60700789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6ba34dfeb58d55ddd6de7541442f945945943d4c87929235e940c0cc0aef03. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CADE60700783.
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 0x348cd1bc8d6c920c04037a4729caea71f881383917cf9279f8fcae2d08697528. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CADE60700784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88a32da936db688e5eb0081f6c57d07036b6a6fa3d00a7e7a7b9baf99f9d6f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CADE60700785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7386cff2c5a00f4c80d73aee7ee5a4ddcad3765055c8156e177dd64f6297ddef. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CADE60700786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef5053be4bdd14480662f1a875bdef02a713d1704217bdb94bddb38a25cbe3c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CADE60700787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa331121bdaee2610bfe6d0555fc15ea07af29fd7e36e59b169c80ea2bd292807. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CADE60700788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18e571ee9ad58ffee3d9d69c35119b5b14be2aa57f655161cab2d9ba11a0ecc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CADE60700791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa06e74cc59e3fcffc35d80e5f303ef8163ef7d179b08b8f1a20ef98782a36cc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CADE60700792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef0d675824dc5dc7fdf14b288b977455f5c7156440bb9612494bf3f91cb041. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA370582786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b5990d8a57887d53992b80abd873a444f38a3096eca576c0690825de97be41. 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/USA370582788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5777d905ceb3bf723fc67f862f1ee7eee330a2d87a2027863880462cebebc7c. 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/USA370582789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316b2c0d323e762c7b4de30dda0486aabbc6683eea2bc4590d079a034d638da. 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/USA370582792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac1e6183555610480e462a668b617c1cb59e08d0c79a6c65c29673a5807bc9. 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/USA370582795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d6cadbf43abe43c46f02ed91600c341d656dc82a87cb5e010ba2ae233fa5a9. 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/USA370582787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd1bedb9dcc6b9203c3e036057e2b750d400a08be3c92f0298e01ec6cc12a8. 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/USA370582790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda7880b088579d1368b2259659da0bbd57b9b206b413e350f9514146e10798. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA370582791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632bee251ee7a160161af44ff325a962fa7a95e5ab63dc3b46f499529233879. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA370582793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574374b7cbe8941214141c4f5552159ea3cd909a90bf5d29fe4bf309e96d4647. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA370582794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70135218707d65fa927472949a5aad370355a2bf49370356673885acebe3d983. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA370582796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1cdb0c042fa3225aa5c057c92e2ed9ce6f0c0e0f003960abb3cdebe4914ff1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA370582797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4394e48407de45aa39f2b5d3d71503b1cfd904953e3e156941738942cfa6053. 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/SEVVF1002111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0297c51bf66b027837130aa08c0dbae1575e6550dce5fc9132643467b7eed9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEVVF1002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7847e4f6b01e24c2fbf056e5c93dfc51b22facacaffc4b4d97337a783ab8b62c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEVVF1002109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92b009883c71c4aa8540f93cbab6031e755cdbcd191299d23bc2f40df9c49c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEVVF1002116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256ac2dee4ec5954edaa5792bab5fdb418d9e26b5fc4a192b638fdfef29db69. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:35:51Z), 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/SEYOK1311413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c08db1cbe60c890d0bb9913e02495a9b05ee754985d9d6977d19f1818ddfef. 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/SEYOK1311414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44460089d5774ca67d190d4c3698102523c94bec09753dfd59e53582a5c308f. 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/SEYOK1311415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e9df65474adad1399601b625b06082c23363737a2b70b955aaea30f854784. 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/SEYOK1311419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8995c7fddc1988161148ac703f30ddb2a434aa7fb0e3bbfb87f93e533499a053. 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/SEYOK1311420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa401675c83860e5fd3c0a2c5aec137d49ec09c3e6cbdb819b0c4916e4598fd4f. 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/SEYOK1311422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f33cca56d449927648677184e622dc84d670f86e6bb8a9b412de4d9d033494. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SEYOK1311416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705d54ed78f3615656b698897286c24c82ddbd064edea8d728c93d6933101af5. 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/SEYOK1311417.