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 0x16249c93a4ee4249628ea66c9a6f22498fcb323b998dbf3730e676eede216545. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e325dfb5-3797-4d1a-a64a-13f15fc5f15e.json and https://artists.proofprofile.net/proofs/artist/e325dfb5-3797-4d1a-a64a-13f15fc5f15e.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 0x12ad6e2a0d543905621a2306054e0e516be1485415bd268249487a49be1c019f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ATRA20700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22512e4fa892a26667b5b6b33cae686ec49419e6b20bb52a188fe66ae0a9fd56. 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/ATRA20700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84fbca69dba89ce46596a728a8e13f6dd55aa8108db7151b62d317300f96177. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATRA20700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60155fac5d77c65722b20b29a42d91b850b7ad70274d2e189b41369a5e1af6bd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATRA20700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7296d062c0edb3c94ab96301898370f06710879f34537cd78821e51983af0b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ATRA20700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77beeeac7c22af9bacbd2a907be0e942d4e37c1067976425b815a02941f4006f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:11:24Z), 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/ATRA20700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d97ac544730f0d502f8dc4fc9c2d662b7acfb770c7df817b22c9c2aa411e1c8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ATRA20700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c36761379cd51b62288b03612b1f028543f4916fd2453ffb1fd6a7b12f818e. 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/ATRA20700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa55569a58c1ad68dcdb128b5c1b673d4c63e1a42697eb2da361ffd6b780f33. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:18Z), 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/ATRA20700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493811a4a281a2dead9fb77c0a14282be26bfd5251d03ec54b3e334a76edea2. 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/ATRA21300501.