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 0x6ea79586710cd1b59ea73485c493b885a0f8f8957b36c446695f080f171735a9. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fc5a512-798a-4274-81ae-ef5f208f9816.json and https://artists.proofprofile.net/proofs/artist/4fc5a512-798a-4274-81ae-ef5f208f9816.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 0x7d6d14d0157c309132370c1a4440f427767589b3fea0c0ad7b75aec6d3141bca. 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/QZ8LD1976060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b0ef0b237481dc50ad7dec5fd254ea36fa10863a4f23325765e03a176ea56. 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/QZ8LD1976062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ff03cc559aff52e06dd5a3c727427197a7797e61860ff1f8bfd4c9cea3ea5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ8LD1976063.
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 0xdcd66f44aca4f00de440e3cd466195d7cf2705f54aacf51170c645ebd229bb8c. 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/USCGH1987366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4c00b8d4ecf66f6aa433e6f50725eda0acf2f9a31d9946cf3495e3398c179. 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/USCGH1987369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dffe9692893acd49ade2ec0230d26ad8fe650a31246d5dd3e0f95350e3a4f11. 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/USCGH1987370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e92ac9ad389d98491a2c5a0cef814c9f9d6014841f92683c97fa650b6ec40. 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/USCGH1987373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a5420cd7b8eb579bb80dcad42f454cdbc2ff8102cd4a9a7dc31433160158f8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:02Z), 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/USCGH1987372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02323df694f8e19dedefec8f25ca4c1e706d70ab03f9d8b00c4ce9391c1941b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH1987365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ea504d8b9d02db5f481968b731e56542be78ee56596cded389b216eca86af. 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/USCGH1987367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226ebe6c4ea985cc552e0f0f938db4b17225140e53a23e4f1841e72a654ec7f8. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USCGH1987368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9765360af779b1f23969499ff12ccf6b897366e5b399858a9af039f9529531. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USCGH1987371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb64196d6f88a5084c7e82d1900c810b27cb107ac1abe701f4c1ab19e0611168. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/QZ6NW1600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8fad59166bc3128396d7aa432fb5f4cbf522274e0f228025c0727b98c89c5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ6NW1600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd782c5a985d17b37347a7679bbfc728af1425ba1aef640462823c72e97b03b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ6NW1600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb174fc7d5e83c50c607e4c344a060f3d61f33ca46d0fff2a45b43b86b8f63. 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/QZ6NW1600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39b45e41db09051173d218c4babc4dfc99fa8e153ea2eb9822165d0d37eeff4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ6NW1600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d5ce15bf1231bad68338f9c180cc4f64c2682cafb4b704df2c290b48bf614e. 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/QZ6NW1600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a74e4c1f83fd428775c0f9203b8f28ca257a17f02557ed453a08535984b22. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ6NW1600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57dfcd6b70eb433f60237c13d9d2d0f34a04d41a7d37b78be1a1c17454727bb. 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/QZ6NW1600090.