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 0x8f4d0c9c1191b172ff83f3ee4c0fe57723260ee46fa3997b3847596407f61e8d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55d24b71-8868-45f9-b145-ead158a73b76.json and https://artists.proofprofile.net/proofs/artist/55d24b71-8868-45f9-b145-ead158a73b76.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 0x3835b9f4ffe42251d015e5118ed403322d663a46a4eea90b6ce4860de79ea04a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:01Z), 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/QZFZ22043079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca69550e7a396041ce5f719577adde3cdaa25501085ebf3beb55ade4682832. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES92069508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7338cc64ca42cea2aabf8e9712b780b318cb03a5fcf9d083fd634beb5aefd4b9. 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/QZMEN2087313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19dcd84d7a0e84968019348c55a47af9490996fd1d2e532947e4472585550e6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWZ2026566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2755db0c09b7135ba543e32114356adbac5a3e5a6ddd07086a2307e2adcd55ec. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZRP52150415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878f3b0eb1ef1736675daad84f7c5a446f277aa7f9e1f9c339ed1818c65adea3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:43:42Z), 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/QZRP52150421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadd2a2e4a2e93cb4585ebad0856daa9ea07b5faf4f9a66e07503ea26cf0df90. 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/QZNWZ2294720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79713561f056a7cde6ec72b424a4e53b776fc6359fec5e3286884026ff1b6ea. 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/QZHN52544797.