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 0x6315f10dbdb05630155a06c6ea0280f51d384f02849f75323f3cadbccf812c63. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3b53c5-b7c9-4975-ad8f-7be339d6fbef.json and https://artists.proofprofile.net/proofs/artist/fe3b53c5-b7c9-4975-ad8f-7be339d6fbef.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 0x25cea495518887fd969dad3338704a2d083df777a6998979ba7b3224c7b969ec. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:34Z), 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/USCGH2226253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356c621755ab0b372f85997f916a665c2413560280ef6ae04dc8afa0109febe4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2226296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068106a2b2995c9353eed0f2509a191f17ca93d0260bea0e87ad6165aea07034. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGH2226307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa041e056330b3ed2ba67713ddb9a5e9565dc7f572a50a6737c4d469470b8b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USCGH2219149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212672f2b9b94ae9386620d7e5e75dbe2dac0e8d6e5ebb47604bfa6ac6e41ede. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2226359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4acc1f5cff855ddc5c432aba403ea5d2d095645baa70f0874c067fec85d07bd. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USCGH2219150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e65a284a1cd12aa5595880bf746c24bfda6d0d1bfa7caf30d361dc8b91da1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:04:15Z), 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/USCGH2226418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69fce44867065247dbc3349bee215f241c78b97d89460809630b134f6f00bf3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2211541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7667494a00ff9afa5c40f80f0b6e4f77929134b49e8b7ad0ba0db4d79645e9e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:45Z), 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/USCGH2219540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da98fee991ac0ec9fa28222c3ebb65176e5d488450f42d1a3fe1eab5cfa041. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USCGH2219559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd950cf74460b89937a578847b1f95db9617b45d40100f03e0eaaa8574f6f9cd0. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USCGH2079465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5b318426d3351eb4c3e1d4c09b8124f4c21e7a2628195ce2fdbf780415ef0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USCGH2087288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5092eb13df2ff391a467ad2897cecbdf437431155b3c1da0fef0b0f007681. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY42161663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e710352e9c37a796fe133482f56737c19f0538e12f039003f1c602d55f6a085. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH2226259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fcddca6fa53eb50b8a221e3b13850fd62f6e64df38282b8a93e351947f4eb6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2227061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5885b67bfa61f20672df779859320d0e2a2b8a583b5bc689fef82fd0dbd2c5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:32Z), 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/USHM82273276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8356b11e66de16b12b827dc2b81591c35ef7b24bcb351c8a94a476949690e46. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:57:51Z), 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/USCGH2397970.