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 0x8e419c0b7ecb00eb3ede2eb5f1c5acacb9ba7d0cb1d3e1bcdd8a51bc85306b80. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31b6aaee-f2f3-4bc6-87ed-949e95244ce7.json and https://artists.proofprofile.net/proofs/artist/31b6aaee-f2f3-4bc6-87ed-949e95244ce7.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 0xdf920c0b698ee3cd7418dd2e9fe8c4113a07d2172d17d2c6bf83332d7f26f3b0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:58Z), 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/QZK6Q2557817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47f2bbe0c71717bddaaf97b45a01aaf3125234fc1ca324793ced26e12d0597. 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/QZK6Q2559811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ced5aba9e229ad2e453c0a293d8e045a7cc5e081c37149d68905a8b9fdb4bc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:31:31Z), 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/QZK6Q2552319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fa6357b46a2f50e6d14eaeb4db0c7df256c44ad29271304767d6f1f05f1d6a. 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/QZK6Q2568573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85e6b17434e2484eaca4b8fee11a07d58665656a5eab01ed242356295170cc9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZK6Q2559809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6c7e971e0b2ff9f413c17278d10f298ba0a45f5ae28477fe3e9ef0f235bff5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:44Z), 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/QZK6Q2566562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17408551f89e6ef8be56365a7336dab7fe9986160cd687126f70c1c95f2197b4. 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/QZK6Q2568587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9bdd4585e0aeeef3b0099e17e1817ab256e29988c9843b86d2e34496d15d98. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:50Z), 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/QZK6Q2568581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622eef0a07d42ba8eba5e1a344bdc44600e43892cdbb828565927b6cd94670a4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:35Z), 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/QZK6Q2568594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601c1137e2b0f9341cdc8298451bcc51228bda92cf3f0715ae70f2648341e90d. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6Q2568585.