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 0xfd81c4ce728786ac95dd5b7db44e04a5dd171160ef9b7a7e7fd7be999ec7a1e5. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c96c978-a501-4044-868e-9f6b634f2c34.json and https://artists.proofprofile.net/proofs/artist/0c96c978-a501-4044-868e-9f6b634f2c34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Na Strahovskejch Hradbách Stáli Sokolíci
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 0xeb0b564199b64d941bbcdaf5424b2b263980903c7c4b98f2ec5285cc65ae0b60. 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/CZB401801613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a7672d3cd5b059f82b8171d339b70768ebba71b1b7c417b1c32eb9aa447b9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZB401901886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec359c658441faa8482024701db44a422cb65147730b4bc746670279458434. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/CZB401801633.
Sokolíci (Na Strahovskej Hradbách Stáli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200cae5ba6178ff5c094ee6b06e9145b6ae877847bf62ad358f5ff66afdebfc. 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/CZB400500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf620e0a82465823392164ea43805c0ceb93f23fcc07bbe3b7d9b1631e7ac3c0. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/CZB400800405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dcf1665975675f4171abbed472b11ca18d1599378980249373f3931df2d1dd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZB401601194.