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 0x7f36e8d17f21e0404b2f1d0d01dcd2cb6694d68f2fe617b1a507668b5342fcee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35095cab-438a-486e-ab65-0e4c04dd568b.json and https://artists.proofprofile.net/proofs/artist/35095cab-438a-486e-ab65-0e4c04dd568b.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 0x2b234dbde7a0e02d0baecd321ac7146f16274d5876a2965c0e2d7fc643ecc098. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE6XX2379080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec88627789f017d3bdaa0fc9bb71ac4236fc51eb6813ba5e8ce54ffcd9701611. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE62M2384277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a18a45225b81e70c2f63cf29f256dd5e2472c9186893e903a487fceb2ce3d25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE66N2300681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1d5e8b391ddb56c31cdb02e92b7833380e17265f51f7bad6dbf23661120b33. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:48:30Z), 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/SE62M2342110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2a993cdf12f0f9303d0bf3e68d10f08ecd43dd5237085887f557847af44632. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE6XX2320725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b4eeefe1d5807fd78055f79b2bc3d111bcd0cd6d95e584c3314a6acd8adde3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6XY2358115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c77bb878f8ef098580e773cd20389ef28d7d35d14c97971fa775f63226937. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:42Z), 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/SE6A92330319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086791b8cf550758a89d1a18d7a8b68d5e0d8b05bb6058b378bbc7b4d77ba905. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6A92350517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adab169a91c2454031e2ccf38cfd94e36bd5bf698373822fda1e33eee570331. 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/SE62M2372822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7caa4bd37ba1e6ad76a29eb4de9e6f72c1d1e09c6ac4a71a007069184a5b8a. 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/TCAIG2444799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b87dd0143bb15a7a7472d92ec22b7379cee893cce329ff4bfb3df4fb3ecb34b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIG2444809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d705c85adc5c08c89622db41dbec7623f3c7ee533b46049c0faaf9957ab475. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAIG2444813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d04fccab4c4f0f157818928c6b1f66fbae02152c0ad6bbd394566ae02760b7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAIH2444827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c5f4232e7e3a80c926d45a19bef99541dff53adb6606421903dbdb2db205fe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:56Z), 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/TCAIJ2498463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77213d3a3964d25cf9c95a70571bdc63569f7fd7cd3c6e91ed1f6c6b2856115. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIJ2498467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac751533e0eee580a0dd1940ae45ed84611059ce59f70b07034200a430e329b2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIL2428258.