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 0xcbeae0b0e04b56088422242bf9b3649df2f9ca2052e69d29bfe87750966eb732. 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/5372f1a6-bc57-4d6d-97d0-864e58188f13.json and https://artists.proofprofile.net/proofs/artist/5372f1a6-bc57-4d6d-97d0-864e58188f13.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 0xea51397c36368a3799067767f37aa56c3b948ab147138fe460f73d22efaf06a4. 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/KRMIM2346787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5e775d044ba3191769f49ad014f80bd6fe88a7e382b139633b6749bd295be3. 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/KRMIM2346788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709bb9b204e56ff926f55a28d0c8ebb384f72596ec889d9a9e96f69abf386c9. 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/KRMIM2455865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb73a4ca024f4c71c3927a07c2257f76d419d38b5b682adba59b7f54c862055. 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/KRMIM2455866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39627ebc12cd3fd0bb2a75b65dfb5fd58c60484ef776fbe5c23fefa24c9be31. 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/KRB472200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0514c0989b3df07954286466f5a4c8e7dfe385817668c6a770fcbd08fd74a9fb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/KRB472200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb23ea9ccfedfe613cda26238c59bcb12a8554d90f5d361e18fbc8fbdc3d00. 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/KRB472001618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9409585d1f48c8ebb2a7c9f0a6b0b3a7b8e2f9592ca257f73ca984f63ffa8a. 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/KRB472000856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751ef26ac287411885ec5ee333593ed192617478ca13288a727835949e0b9e69. 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/KRB471801751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57aef51f650a6ea1beacee9f1253d9d120bba434c60bf46cb4cfc7196af3106. 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/KRB471800918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1708d0ee5e4e3af97b427fb496f47b91fd74583a7c70010b0b2dd016d8f1583d. 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/KRB471800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c6ca477ece9d9d6ff72451a4fa720e257f16977ae6760ec9fb33451c1db319. 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/KRB471800251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c6ebbce8b6072f2d7dbb450a2e0fac47a458ad8ffc8879b0fdc3596b0a8e3a. 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/KRB471800252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b2dd6aeef566d9577998b36ae9f42bbca3b3721ba9824020c912cc901af251. 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/KRA341786210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d0974334937c0b95b259e35573b42e270ee32722d1a64a37ffe89af75fd65a. 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/QZEKE1931195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45b23accdb6a47e78ebb0d3edea0e0b8a14331b31c7253e360e41db31dcfd1. 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/QZEKE1931196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abca3bdbfa8548b6a0199b4ba8d43ce4a7e6c7ff41531abc52212b091018094. 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/USHM21812901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b76e31b79d6ee82058567d654657ac2dd027ed2a1d0b07772f57d9d965c39ed. 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/USHM21812902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d8ed2f5f67c6c742c6882a0c4631aa9bb590c2c4fae26e04d26b296513d842. 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/USHM21812903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc84db508fda41bed0ea26cfa022415c372dcf3d772dbc60279d299a3d86d9a. 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/USHM21812904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5efb35405975298dab81f9a9d50abe81052796025d8a678de2458355549c5c8. 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/USHM21812905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5a29d9bc7c8146921365162a543e6923196ab2599bcb8807fc2d1d59cd5f1. 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/USHM21812907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad73c9b527e223f2b42ef6f774dad3ab1def917464224255f1286b64ce6442ba. 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/KRMIM2161159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13191e58bb58a7e02e72fb55f3fe3456a220983e164e0f74a24bc72a30f45b. 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/KRMIM2161160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f3707228154640ac7a08de9796ce695ecbf74d5f49a0486a70bf0b1d88f117. 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/KRMIM2161161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0cd1de433ee353ccd861d7080d9fc3594c7fb92b36a767983ddb6463ff0ef. 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/USHM91845217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df6ce05677a2b9d4464ba1903bedb5e6fbefef00a84cdc9308aab38dbefb6a. 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/USHM91845218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e914f036bce7626526d76150dd7c0e68bb960e8301a06e9cf1d7e62ba0400c. 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/USHM91845219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f533f172287668768096c4b3f79e8699eb19a46ca3c593b5b15e4fdeeceea02. 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/USHM91845220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b027ed63c80164aca2fe875dbc33f77c4c9415e4cb95f383bc7805bf62aee3d. 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/KRA252102204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab762a0b127c573cf081da0b2d0781e36542985c12cfadec166415288df4bfe. 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/KSA012181725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297de76843657700614ce6841ead67755012ef47767826dca71aae0fef4c21c. 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/KSA012181726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1752c55a993b772f0189d87ab9ff95a204bae1bf6800a35bb90106facdced118. 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/KSA012181730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae0b6d9f48b56189c60859bfcf1b559f8f525be11fcc11c966d399d7d318014. 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/KRB471800984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c089dce88301e44ea9794ab3961304a208797fa8f92f6e95abe879d1003f254. 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/KRMIM2008868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28819bce00fa59459c0f1d47b4457614e1c9d9205fd4b34cd5c05f921a4353f6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:12Z), 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/KRMIM2008869.