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 0xf21281d787dba2dcb9db48769e223278c44352bc4f467ae0ff58a64e41d91a65. 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/6f3793f2-8af6-41ce-a330-33d5b2458f2a.json and https://artists.proofprofile.net/proofs/artist/6f3793f2-8af6-41ce-a330-33d5b2458f2a.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 0x1f4806e8d42d9a1a96316e48c099b1a0d1ce7bd2e3ade0adb85239c59e6cd158. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:27Z), 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/PLR862000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d9b12386959c17af3284fa804d68251ff09ec43ca92bfa21a19fd909e652c0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:17Z), 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/PLR862000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ec304d4c343064240a75ca900b60dcce87a51e1394a47266fe36de1fd587cb. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:20:16Z), 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/PLR862000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f060b0a82738500d0c477bece3c9b9c437a7656eddaad6de2e4973343669f1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLB171200936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e1c24c0928a4191183c348b5b98b4667be0129e47a56d3e719b732a8943803. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLB171200939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24346d02ca5908b04aa946809809e5754e782e076ede83d3922acf0f554e28e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLB171200940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6d531dd20f979d64aa76e67501548142d25bf98753fb10f41c95778e2cdec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:10Z), 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/PLB171200945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0204d2cefc88860c26bcd41e0f494faa2efaae0551be8b5317f327e1137dfe1. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/PLR862000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf40debafb3d2e36055bb92dcc5455374d9447b02a7b3fdd41da74742e7e84e9. 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/PLR862000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b485cef68db65e9b7eb85ed77b14ca4f1a038b4f0dc2efd06a473627ab0cd6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:48:50Z), 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/PLR862000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a51238eb3437b1b4e2f59c13747945c8c46b4d42b49afc70f08881f45da1474. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PLR862100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfabfb117a220a29a2471403ea4d2c3c9cd1c6b28635c7486e5dc4d566503be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLR862100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5fa29dc8d79ada5cae367f49d126c9ee640c411487771287fff10b0c389aea. 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/PLR862200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f71165569e5d835783225dd2e8db1fc5cb8c852a5b05921758514129940ddd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:25Z), 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/PLR862200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d61935da1da149c354295e59f216ee81500a991b988f0dea9c94dc5935fbcf2. 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/PLB171200934.