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 0x542099a2e4d4008483c3aad47a9bbf7b2603c6cb874e8c44c8c3ca04abc52c6e. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbe55c12-e9d5-49bb-b405-8ce233993453.json and https://artists.proofprofile.net/proofs/artist/bbe55c12-e9d5-49bb-b405-8ce233993453.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 0xd907af3996e0c16cf4521da3bac6c5be0b3fd1777ef81789375ea7788d5757a1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPU2227551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad339e8df11714454fe6d1b3945ad17bd27755962c9c8ceefd356ce2e382b6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPY2321274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457de5d6a5943fd540ce864d0f8985d0f1b6a45dc89f92b1ea181aacf3c73dbc. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPZ2424489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457de5d6a5943fd540ce864d0f8985d0f1b6a45dc89f92b1ea181aacf3c73dbc. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:08:14Z), 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/TCJPZ2424489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b57a10ad2f0271e70aac0a96f4af92e4b8c6502da067014e43e16df8a54a90. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPA2439223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc46ce78b85198cc7c6afe5ea61d58b81f980c3a089679324a83f81ad781d24. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:58Z), 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/TCJPA2439255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacd44d6b9f2e16b1b9ee8e1ebd987f10940ff9451084a1449668363146319c9. 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/TCJPA2439257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb66fb29279384a43cafe1e5b0a078dae9b0751f711b5531af261f05ce8539f. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCJPG2560647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb66fb29279384a43cafe1e5b0a078dae9b0751f711b5531af261f05ce8539f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:34Z), 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/TCJPG2560647.