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 0x470b7200f1a930516ffdf09a46e5019eb538a7f56babff09840fa7df06c5ab61. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7da8d8b2-1210-4f64-8288-ddb0f06815a9.json and https://artists.proofprofile.net/proofs/artist/7da8d8b2-1210-4f64-8288-ddb0f06815a9.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 0xcea7406ce2b0c1f4e989e1cd80dbfe17ecdbe52a1177f452ba9b2c3241242655. 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/QT4K42527948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a50e76e281f5b24a121245b1bd19284c4d802d6bd6c58e06d6f1a5c7d45c2a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT4K42527949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa8d4d9aeb73da63431cb37e4288c346394f6056626f3415f2b1c01b597639. 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/QT4K42527950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1478c18235eb87ba5b1b1b3a6ac5422e07a1232c64e60403fb805b735f14bc8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QT4K42527951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f0923aa826dd247f7c6d86876a7ba65c3d1cac49365a8807858b1000a1e10e. 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/QT4K42527952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeca1518a87d80654c425b9545623ededa982d849e654afa4b6809971a6d451. 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/QT4K42527953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae5a41c0dfadf01c7ac5dfa3ae04eea606a9232fed104708ff2451fbc3db4a9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K42527954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd353fbbf2c75c6b4a70e5fbe68d4ddb4d19a4d6ffb8f4309aa22473801d1248. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QT4K42527955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8860612cf6917cace3a2580441085c240ddddae25d3d8aa34b0827c4f321f8c9. 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/QT4K42527946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e9b85df7cf68dbfe3dd59e6fe6e9212008315c22d82773f444478bd0d1345. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT4K42527947.