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 0x69a8ed00a962b6259ff2fc29f6263101871c6323e5142c3b30f4025c242b3f03. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b284151e-a5ed-48b3-82af-054d065de9a0.json and https://artists.proofprofile.net/proofs/artist/b284151e-a5ed-48b3-82af-054d065de9a0.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 0x34fbf3476c7dfa7522300a145c16f9e72a9188568a0a526c2d5bef875e4218c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF1527714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6fe3c3bd0c268bda564bf95743be309aa847e9769918df540b5e999ddab040. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US3DF1527739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786806fd4529309afab9b095baa8ecb44c225a0898cd466cdc72fc2f6f2416f3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/US3DF1527678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007650ac5f5ec5ea570b7c15cf27b8f1cc570789b93d136d4100ee425b690825. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF1527679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a2536f1571f59dbc974dedbe9b15a0c61135228acc174f5742af8e087d681b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:45Z), 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/US3DF1527681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe0017dc80fdc82f35b2be7004caaefe0638c17fffaece978db6ddfcca3e2b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF1527696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e202cfedd5f04a9f86a222b9f0b2fb2e35ccc0e0a240dcf1bd46cf21a9c634. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3DF1527697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d434e6d8b57b64a5f87225d14058a7e131c2a64c45703d77024c249d95ea92f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3DF1527698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79773e996fc796e85165c381c4e7d0b51018d04953aef351319f54711ab6925b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/US3DF1527705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64259d6efe3d37637e571ebcca2c18d6eefe70d94e6baee9d7adae4cbb68a998. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF1527707.