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 0x434409767190baa28c26c7fed8ea1f428b8b6484fbd61f2680405bf479c72237. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36764baa-5b3e-464a-bd0b-c85a9a3ce4ef.json and https://artists.proofprofile.net/proofs/artist/36764baa-5b3e-464a-bd0b-c85a9a3ce4ef.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 0x78015d1fab515d8eccd78822208ea4a598309fcd153576db5f02a6aa613ae9e7. 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/USCGH2534341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9735fb5afbd4f7a368310174082747866c9d69d9b8e6b50d3051dd99ab999. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGH2534342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d98b7cb48b7e090918c726b5d28c3891d334b8dd8901f5233cdc90241f91a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH2534320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7da19cfa59c0db2ff0e23a67db79503652e163410472f5113d601ebdc37f165. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:48:01Z), 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/USCGH2534321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b76804cc2c9bf18bb4c7a1de0f3266e849c1596c60d1c1886f6c7b9b178bc3f. 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/USCGH2534322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8602781fa0f78c298f8da500f70ef6fe7efe7f4844377fed705dd06a196e5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USCGH2534340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2881d061b808cc11d2edad0e36529a313d14d95988068561288e98b4077819. 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/QZYFZ2511209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dad47c756455e2500d64da50d054d89f360ea76c552ad223678e9647a58e9b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZYFZ2506526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78afb9ecb132d9a8878adf76177ebfadf3ea4c62e9719fd23470cda9a2cee5b1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZYFZ2506527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dedce6aa9a74e09594315f3261aeaabe4dd7bc55eff2c6f933f07cd0f8821c8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZYFZ2506543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad0bc2c3f7d5750248a9e04df26ec02b03a8888e6deb45b14deeddfd042bea. 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/QZYFZ2507309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb558d9dd0b6af7c4552c93703566ed45c65749a75bac7ff95420c61d6db0992. 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/QZYFZ2507302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e8d658ee4f5d31d78acb4dd0788cf555d8138cc111d57ebfe1b67f1f5da1f. 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/QZYFZ2507303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f03e6a8521f8ec4461c577b384715f8c21c7d3f0fcbadf088be98672f5702cc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZYFZ2507307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb753ff0437d87331d7e9b9d7c0428468e84c2a8afa23db048501beafd620e1e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYFZ2513605.