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 0x13d3e83f41e06f7c1c4cc8194dcb167d26c8bed8c7419ef36cffda566898d346. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8e52eaa-97ce-4c5e-b9c4-fcb9252c7e50.json and https://artists.proofprofile.net/proofs/artist/d8e52eaa-97ce-4c5e-b9c4-fcb9252c7e50.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 0x625b5285264b62b5a98fcc84372274e8c604c77a783e65bb05988b6611113d37. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:48:50Z), 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/QZFZ62558451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa491808366bd050a7040fb4d434de5a5d53f9fc233d7eb293bbf0a7bbe82c8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:23:41Z), 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/QT3EY2434500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56784f7f6f08584a45e324e27b8d82ef8f29a348d8bc8109c7128c3381df861f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ62561083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d6c7c165c132c8793b512810bbe36194b780ffdf80f8c32ddccc984223bae2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ62561084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30445fb15650ace4f6c0bd480606cea9d14f2b27601c4dc2b21983235d958ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EY2434510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdda2b356202d81a6d9ccf7659719d84aedc873bf7af74f68f0b5e1edf2a0c7. 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/QZK6L2538871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3f0bf4e5570be355386d2278fa8e84b792046fb60e8cb2eac7e27abd20494. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTAW2552519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11218cacaf6ac784251b7c0cc678171e116e7d0211e0f704875be3d501861ee2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAW2552521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5acfa1b8ea3df6a749755b725cf921b7019307365af4486d809c7893498b4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:23:16Z), 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/QZK6L2590598.