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 0x43125c7455fa46308682a26528b78de870d18a711674981c6e74bc0e98a9de8e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6316d23f-2a45-4716-b9fd-bf2eb715da12.json and https://artists.proofprofile.net/proofs/artist/6316d23f-2a45-4716-b9fd-bf2eb715da12.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 0x10f9874448021ad8862b20ff9d5b21b6b26a54959dd0f72dc31146f1b3e5734c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM21939165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446d61d2fa4053344530f218fddb86c94c814e1a5e8f0f6d8dfa5c9e306539b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM22097386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84830fe9af0a03f560b5240867f444b17b918d812cd6bd49fa8157581dc10942. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHM22097387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb22f59ccc4b12d9cdf1bb3bacddf512228a0b085a9ac157e41dcd6d4b70ed57. 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/USHM22097388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637aceb3893e7b9be681e4533315adaa17ce2406f6fe482c44646c620e92b477. 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/USHM22097390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd650230d7839a59d213c3f0e1432020a47b3f98e9f393c93919d232b7312ba. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM22097391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bcd63f7794f75578836d12f42990f78051c859cf43026b29eea2bc40277480. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:42:55Z), 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/USL4Q2068393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8d17c3c9d2cfb4ff1f35b8424b63d4e9d7b3520353d8cada450222b9d3bea. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USL4Q2068394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d6886cc0d8180d50d51348fda0a58e171ef97929935412c0b92c5c492202d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN62138935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5870d0923b2ca0a390ab4d96ca6f7c60670e7dfef5e8f3be0d9c5640f0c4ddb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62138936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb41691d540e752d8a95dd5b24da36ff5bce0ec7aeb1edab6c85c993fd502c5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN62138939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c0b5dd9082a179c50cb5f0d2313ea43174313b90b87a3707cc518aab6b07d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN62138944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331495e29ad9fdfbd5eee028c133f4a98af31b847f74373f741137313e906645. 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/QZHNB2342145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8cdd7848563635115f21d50ce6a095688c4e978c2ce42152c0c8747955fcf. 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/USLD91751820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255eadabbece019e8d9984a72991e2dcfcd42e66b2077f84230f2776b6aa7e54. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:50Z), 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/USSM12509383.