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 0x62eccb9642bcaae808b3050fb05e652b1003932af8fa2bb7c6710cc316f678ce. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/352d3bd9-9e39-4d81-8411-4505f6e1be1a.json and https://artists.proofprofile.net/proofs/artist/352d3bd9-9e39-4d81-8411-4505f6e1be1a.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 0x6717ef0012650ea1fbe057e283956965f3458dd0c118b91c5e5437830e410129. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DKNA22007807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedefa17167cd3c76a9b140d3485ac5e50878a320aef4323a28f51f9cfab74d99. 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/DKNA21503113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272a65e8933c0a56f149f2084803c25a255cc5eb5bb5e210273f928e027b5ad. 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/DKATA0801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cc85cc31cb83dd9a9c38ceafc1333d96a5e3ece3e0e8f40c44cb4c2b73fd95. 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/DKATA0801002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72bdebe4969334262ba2645aea6eb1c281c071dd8bb18b5d7f11ce60515941. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKATA0801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651a1bd23f5ed7c3fd2fd44a80c944302ae88c7fe0cae53db561841707157c09. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DKATA0801004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e479702d0807eabd6487de91aedf09816752ed29e30d33a96619439980721f6. 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/DKATA0801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0b20fe37abf1706d768955c75722d0372188a68778f93f111f59511a823ed. 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/DKATA0801007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80abc2f76557ae856bed812acebd1146a15c7782beeef244a2bf5693d2f18f3a. 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/DKATA0801008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61b0ac39dab470e4d557d6d5f98840d79131c9d2112cea57616580cc6b5993. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DKATA0801009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe981b7dc6fb4ee67f69d308cb5f8f62286787ad388e78073d861e8d41c6e918. 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/DKATA0801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a6bcef834b64e5e43376731d7dc85ef1363e113235ce4bda1dbf6b85ffd14f. 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/DKATA0801015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de95649c72e838faa1e07d374757f6341274c8c2c97af959b0bb0f12fe3e76f. 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/DKATA0801016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4355ce6d7b7dd3b4c2af26f44bbf94ea90347e589a6b31564f945e86b990b7d4. 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/DKATA0801019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab92aa9a42c8c6559394f25acda3d3fca3b4ab6f79b6026a37ae418a2df6e28. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKATA0801023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507737a8646ccfe6a7c46d3211c696b203c7cd2a797489ee8c03a332992b9143. 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/DKATA0801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b41787771e0fe13e8e81200f0e910c143b7b5b4569d46794e36011166c44267. 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/DKUM70600275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189763802764dfd4a9816b3f7f18c2656ce2a427ff3858d75e9d5fd583602fae. 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/DKABA1300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d000567f82d0e14138977c29cf9eb3e2b003dea9fa79aa924e53b753f321c72. 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/DKABA1300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9378c628dea81aaba301fb91d336f99db3b3239648fed1d7fa3b8bb4c874232b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKABA1300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb7986451e565ac6d502fb0029d3bcfc60880aa5975492f3426b2f281758302. 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/DKABA1300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d2bc02ec6664fa12714d0d7dfeaa926dea84f5579bcc30fc0dfa2833792fe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKABA1300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1e2e64a76013f2d6bfcc8ab803442391f87e227f4b04420db2a296149092e. 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/DKABA1300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c365c32e82a1064985c1270238c58f08f2a3dab9e201e3d14f7e71772f87922. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKABA1300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc98551286c7765d51a56f1a569c06ce9529f11a3a3ce49e0e3973024e92143. 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/DKABA1300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65151126d42ca324980bde4c62806830b2ed2e9e9f74e2c9b8691ebe734148b. 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/DKABA1300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda1a933f77b0ade3422872748220c6f69ee61062934155540cc6854f2bb6fe. 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/DKABA1300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fa2855bb2bfc9daf2f49066b91a1f5390610150bf492fa51e7681c317bc59d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DKABA1300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223e2c657fccd6be2589b94cf04cad414cdad92a72ec38d5df1199cef623363c. 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/DKABA1300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5932b993c76ca56ea8440b672f919b34de6bd425e682b3625bce293acadc81. 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/DKABA1300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd9cbe50303e96dd264e8cf70c60abd043325e9d1c354fd206a06dc6dfb626. 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/DKABA1300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f43e3467e5d654400807b347e546c0455e8595e63e323d85d831491028f8e. 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/DKABA1300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff921d160f78ae29d65d55b01cdeb5313e7205092c68a49057a682051bb608. 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/DKABA1200944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbee627da0d7213ed412257cdd387eac281122eafb023d550a639c761d99ae. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DKABA1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba65edec3f4c3bf3ccf7646adc581d1828e28116054f99dd6a5159b3f86666c1. 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/DKABA1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0477af4967cb9fb63175b9310062af5035f5fcfa9e53f069d73d911efe3b16. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DKABA1200915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3f2527ba4c1cff88da018a2fb6c3d41d0dc91ca5cf5124e909a77d19a8f580. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKABA1200916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1096d77d09f8530a86de52fbbc5b962d21ae443741262deb26d1b8e8546fda0a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DKABA1200919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf62cc4bdc99b3b0dd1ce571deda0dbb21e02da1fd73cd9911986274f5cef2. 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/DKABA1200923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e0123fe2a907cfe25ee2573f80fded1d2a6a6d178be951b67ef3156ef6137. 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/DKABA1200931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84ba282048dbd15e351c2566cea9529b01ca5557bd22495d8974906dbe4bc9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKABA1200932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c04275ea0cabc5b6f98726bcecd0bb11e74d38ca8844ae168328ee0f37a1229. 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/DKABA1200933.