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 0x53b85faa60836a502c8194d3e3d060adaba725b91aa906eff7d73a4cfb6aa48d. 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/1d692838-4f94-4949-bd37-b9ace16dfe1f.json and https://artists.proofprofile.net/proofs/artist/1d692838-4f94-4949-bd37-b9ace16dfe1f.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 0x0b6e3d7b6d001c225a2d2d35e4ecbf0a89bf4f49f94be1a9b4c3098b5cef4eb1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QM6DC1511764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd08c805dab98b9aca34136bb42181577564c372630839920208ccdf2996c4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM6DC1511766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8b5ea1cbb7dc7b3f6e426dbea712a3c23843167b5b3a916be8b6858a9f0ea. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6DC1511767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2178bc98aebc6b84041dc5546c5daeb3fab76e5b7b5eb29494b0a0a289c046. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QM6DC1511771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c5f7a80b8ccc757150cb506b42bb5470fd13011baddfdafaad4e93161ce2d6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6DC1511775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdcdac3473aac04ddad558ee82e7746053fa3d3eb5bc64f68ae80caf780abf6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6DC1511776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2a14acbbd8b5dc1ad3a672a8efff4fc5a465d343c3b02b97dab81048c8c051. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6DC1511777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1885e402385567cbe1751d6a19bed7681845da1cc3286442d1dde1d8018157. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6DC1682438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f9b289610c35747625a75cc180e00ad1d2a11492663d8158f51bc1d2d3b1a9. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM6DC1682439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6691ed0a341e520d833029aa360e75a0f14d2607379144d21f6ce901cab4528. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6DC1682444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddcb8e8afd7f150a10f014a4e1b573bc86545e1d1b2f2b7fb6f1dc701e89e0f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC1682446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a02f4770ca43581c395b3a74271b388bb8d7422fcd4a7443ec6068d8d8136f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QM6DC1682449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c64cc8e55d4f18bfc1e093ca4a0b3ccc6c17166b5039078095533529d904c6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM6DC2088814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79149e6d70868f18f0273ca472479587e2d838feddb42852769e4bc80fe24133. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QM6DC2088816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64893077e6762d0bfa1c32c209c3ef705194a418b462059588702b121ea970. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC2088817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332947a642db1b7695d0c72758ed4a6a1682f156df03d73b422174551c72b32c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6DC2088819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a9f50a291838963f25944556b4bace05b6ce574e7cce3befdc88b5eac3b71. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6DC2088821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb8f8f26f776417e56dd37bd4a0624cd2103c1820499800688b1828647b770. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6DC2088823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1e69bfe6c18a006daa5b90ef98349fef1e710cf7625830d4360e9db1a87241. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDHM2027948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecbe1abf43787f7b3792854e5300a651f8ff4b9bb99522f4a168f52a74ea175. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USDHM2027950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9c12b9f23363ae0a3cfc44e9c315f85bb6ca67dab398d0957eb2061d7db9d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USDHM2027953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c457f9befd2482046a5aae86a627ec62405a1bf6720c494005fba937bf6c0d4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USDHM2027954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a983b9e0af10f99bdd8402ff7fad09806557c0e27ff2257482696ff49faa1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USDHM2027956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed6ef37cb87be8138960b7b5cc8125aa97f4fdb682cf980037fbd4e80320805. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDHM2027958.