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 0x6f1256e7fe8c74fb8243db6a00956a9a9b4c591e1bcd0937578ccfa4239f25c6. 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/aca374e6-9210-4b13-aaef-c9f01880bf6e.json and https://artists.proofprofile.net/proofs/artist/aca374e6-9210-4b13-aaef-c9f01880bf6e.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 0x84be27070d41268add82ee7f50a5c4a2033bb0d0ba368b4d65398b3c85a2a2bd. 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/DEVU52488498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7262695d1e8bb5e2712cafccb52c5e7570485cdcbcfde7a9fc3d55327f7436. 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/DEXO32235188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa3a74d9f73a83b26ac12342d8c0357f25c1cda390c0846c18ed76bbfecd07. 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/DEVU52488500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec1e664d0698653d41829bd9740251b446ffa74aa3766bde1991bdeb8c37053. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEVU52488502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c81c350374c3200462d172009a3de8cbf6c62da567b8aefd0a3b94f007bcce. 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/DEXO32234990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e07f46f0ac189a02555a719838d5438614c193d17b5fef5479a18a0e0487851. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DECE72003550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312f90e26d53593a085d7df8ac0a9f745e427cdb4b0393059a83f6653b57ac3. 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/DECE72003538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f83ec56d34e18c00e3de319301b10806a7d2416522332786db918a8eebb72f. 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/DECE72003551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5dd8661e892a1ba7a2fa6ac5e2158ec58c3af58a28f4e9545d28a365ca95da. 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/GBKPL1812224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008124423b50d62d586d893172a570aea7dcc3260fd672a27280c0b1dbd78412. 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/GBKPL1807878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5544e342e59b31b17089a6c4936e61ab7fbb6d266b8d63651f6509dbc4da3a. 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/GBKPL1822284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe28689c5e02f7970facde75a3aa72ad667abda0658074946d6f5747652470. 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/GBKPL1818041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca24ac5d5e5e2f4188422bfdcf0b62c2994124796e54df3552086680b743cbf1. 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/GBKPL1820071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa3a74d9f73a83b26ac12342d8c0357f25c1cda390c0846c18ed76bbfecd07. 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/DEVU52488500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa3341fb8eed5e88261414f77e4faa07c421185bd9a97c6439ff47a6f58ae9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEXO52320053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae2795d08f5a0420eb1d98ef044177efebcc7b38da34eef69b061ebdedaf03. 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/DEUE12365367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedf59442a02c4bf9992b7112866dfbaf3640bde54ca084b25677b2fd552fbf6. 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/DEUE12365369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aa1b77968310e9a1ae1978779c490eb4ec0294d8c7ec8d9a9ddee9ed0a54c0. 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/DEUE12365372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7262695d1e8bb5e2712cafccb52c5e7570485cdcbcfde7a9fc3d55327f7436. 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/DEXO32235188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bab3ebea919eccdc0bc9cf242811d07aece4dc64820a3be2992120ac5cbc6a. 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/DECE72201087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a41e869693988476ec62532c093ee6444a18f55b59fdf9c152d5c5a0c71669. 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/DECE72200895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c28acf274be9828a7907d31449e87784648e5d4ce2eaaa6454c4640a87afb8. 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/DEZC62258758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099a9837805b47684bec3f0e9af9a21fac358f9df5cff87c84c92bee3ab3b74. 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/DE1A42132421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbb6d142aafec930337c61a67a182cf89b8e46e2a556b13ff35d2d283260f6c. 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/DEXO62074470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312f90e26d53593a085d7df8ac0a9f745e427cdb4b0393059a83f6653b57ac3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DECE72003538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee26b58ec2d51e910135350a6ca378ce2c3fe1d9ab98069d2acf5b0a4dca61f. 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/DEKF22001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee8001527b52f26f63532fb0c0b3ff73e1456faeda54ac16d077582096fe99. 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/SE6I31984759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2688988cc9147cfe6c00e855cb32f1fac00994b93498dbe81bc3d09304b7a85f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBKPL1936380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa470d402ceeb367adb0f8fbd5926d8740299f58eb44f75b8ef119d16a5c7d26f. 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/GBKPL1832721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2d31c70c10d6bad3c07f9f7e5b0c7db50fcd13ef41e2e7fafa825e6f1a1e8. 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/DEVF11800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47369c155ea39b6cc81035af9044227a125544236cfc5a4d4f76fe79df7273. 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/DEVF11800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2be928ab537eb6a7e99884c5fe3b296e51c666c8b0f73b02b93e7165d8d411. 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/DEVF11800295.