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 0xf6cd3b5c0a47e9457665c39a497f85ad74631f0fd77552e1e2da588538a811c3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743933a5-39c3-4621-8964-afce19529746.json and https://artists.proofprofile.net/proofs/artist/743933a5-39c3-4621-8964-afce19529746.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 0x00b96a1e85e3e05150777629cee9df16c2a79d81117bedc90cafdf73ff20d9e7. 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/QZTVM2293418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd79b160fc606a67b73c5694a525ca447f4e3e00428f147a45cc1e2a6408d523. 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/QZW9M2272595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a885cefd5c7dd7b3eac50515bdae52b081191fdff014656f8c8fe361d337d8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:23Z), 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/US7VG2375332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d40b529ec28e92c627d4a169f8f3f69bd5ee76c05a6b916a8262e7dd9165b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/US7VG2375333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10089ccfd4154e914e2da419716bd7b935a4067e29a2cd461259ca01df3f0074. 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/US7VG2375336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c09166e8a96618ac7bd77bdf762ea12639e11c9f2ae903c8f5d422bd1fe644. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US7VG2375338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba514bf5dd1419349d8e9d3172940cb1ffe2014c2a15ff12aa3f94b06e76fda4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJW2321899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5b7addcb6b331b1a6d362daba14b7bca8c1005835a5811f04cad63bf7bd1f9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJY2349638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca50deb997010487bb8ae960867d47234832dfd8ca0083589ec49f8360182fd. 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/QZTPX2345442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfbe3290c6f8334df5f978cbb75a51e10791534412f6131725296b3777c29fd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJV2472735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe421d848d675d7c05e8d68a9bee9fdbc52a843c3c54898ae117ffb258a9c547c. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZNJW2429520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13801fa8bb727f20b2edbf19ab571c1864ce833be8b95938398fa93c15e1a446. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTVM2439626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb593c1289cc9b9e13477bc7719cb00784e002b5613c4d53d5687782a0651007a. 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/QZGLM2536543.