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 0x5d61eb2e258f6d173f97b24c98716f71a1c16a73a8f048516889c4698781e7b3. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d33c958-bdb9-4c6a-9a81-a8fed903551c.json and https://artists.proofprofile.net/proofs/artist/9d33c958-bdb9-4c6a-9a81-a8fed903551c.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 0xb1c9809cb6e5794fe8f76bfe61bca4638dce455a252ed36c8aa7ff249b4654dd. 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/QZFZ72552166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2088c2e26d7f7807fc97c0146f10cdf598adc48867fe721551e9e879c71c95. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2539446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95723f248ea9a666a827633deda9bffe3408421a5813a4c21846687137224492. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:19Z), 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/QZK6Q2539447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e8f38530e21b40f06d888804f048c6a3e37e2a2f64fea873a8bbb3dc0abad. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:57Z), 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/QZK6Q2539448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970857bb1ffd26d13a7240f2f76f741079bd745b434b899176ad3bff3e8c374a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6Q2539449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b11d88902078c353536c26f647210e19cebe6a41e955338eb5e504b86fc2eec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2539450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3e20130c61c31e401e6d07f65ca60840f98fa400e93b04a436ea818bc5ccaf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:14Z), 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/QZTBA2576836.