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 0xeec4ca1712cda18cbb4d98ddedbd3504231bd128223c747e042477599a8ddcee. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd02db8a-d89f-48fe-9e8c-6366200a2dc1.json and https://artists.proofprofile.net/proofs/artist/fd02db8a-d89f-48fe-9e8c-6366200a2dc1.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 0xd76f925afb3c3dbad64a73ee9f8fe490592e818925b33ac2ebf4abed0cf54060. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:52Z), 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/SE5II2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faaeff53a878729334c8cbcdb38f248620f4dd5541079bc7d38b4b1c6be04fb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE5II2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a61cd68c14b5104b2f8dae7739b64737c774aa305c35453cd433149dcdae2e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE5II2401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee3f7c9cbd5a4a6a5f1a06be39fa8c1d6b853194b9743869ffa27952dbe8255. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5II2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2310fb8f8c8c9aaf4c6b44afa2bb78ec4ec60c22a97820264bdc5e452570a7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5II2401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80356f594d213c35063e0438bec170eecf0c480fc1b09c20e31b317c4aed4cb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:44Z), 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/SE5II2500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f925afb3c3dbad64a73ee9f8fe490592e818925b33ac2ebf4abed0cf54060. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE5II2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c36fb9f495f5cce6c81c7eee1f0444787b276b1deb2cd508947e242097505. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5II2500209.