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 0x32a0b590ea8704639eaf418ddeeb68cbe2338f67cd61f273dde144f01ae590b2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e41054b7-3c43-4abd-9de1-4a210ce01e34.json and https://artists.proofprofile.net/proofs/artist/e41054b7-3c43-4abd-9de1-4a210ce01e34.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 0xf0e8ec9364921ae5d91feeb21eca476cccbafd68d11b22d796e6320ee76e8ee3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/NZVS02000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59c543c2d987567cbf783f2533d412d80d98dd995c05cbe2be0af5e1b8e636d. 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/NZVS02000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7c15e7cc5506f683df95469472eb55810a95fea7a8c69f60793fded58fc233. 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/QZK6F2583329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c944f83ffefcef1c722f7db22eab3e021f180ecabb95a5d8b6eb52498bbee7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6F2583332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca23ffe927495893e4ebe18a27545c7cf34f07baf5dbcaabe22185b379fb7686. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/NZPB12201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518bdaebeb96fb336bc1c96f5aadf7d549a3e4da6f5350cebaafeb317040427d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NZPB12201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc21ed24093bcfc07c33ece551fe1a05fb8ab67d7e764543d4392841a988ae5c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:32:19Z), 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/QZK6F2581303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ffd986bf653f39604d19737b1381c6a018823ac077e434518234ca04532dc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:03Z), 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/QZK6F2581307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c792e5db092d17e9f5434a99da4fd2326978d509dcbe0712352a98b59302b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEM2512543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16653237d6d9fd9955219b70e312fdc44add957d8015a05de95e6c412a919396. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZK6F2576215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12425c0025b6a7879bc4f7c8f2ca940056d722991c0b45152643213a6b36c0cd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NZPB12201039.
Sonia & Aniseto With Friends (Puapuaga O Le Fa'aola)