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 0x3d3ec2109225ae85bd51add715857b80e64e849ac1cca574294c3d1e9407c1ae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e03e223-b990-435e-bbb4-a7e3117cc8dd.json and https://artists.proofprofile.net/proofs/artist/4e03e223-b990-435e-bbb4-a7e3117cc8dd.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 0x15664c6a79cc1d0bbf92d0b366687fa4b264aca0c821a37ab30f4000463519f7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCADE1722342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296b44eb2332ecb868a14ba657f1cdd3a6a62163e5427c5dbfb0d757b3fb7716. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:17Z), 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/TCADE1722348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d84be3db43055e4e2ef62a27f0ffe6c98d386bc70f901a9c96ce836928859. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADG1712882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4995866f3938962d64ed9c27f02f7340fe52dd598fcfbbcbc5d1a26a7fcb90e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:06:38Z), 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/TCADM1805645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a50addec790a083e2e275cd0850bee294b19da8a74a17b0397d3586f15d8dd0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADM1871991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6777dd5805c58be18f336cc74adf606881c0b3926e4941f6ed7a5796e48f975c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAED1934846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db2ddc1c2e1dc8fd1897c8727830c7a2ee5a53355759e9e31fe4bb92c6fda59. 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/TCAED1995921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bd2d4a287bc6d74f7feb35ebbc98ee68ecb0badfe260a9f2a19d43a19a8f3a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZA7U2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70122919f6fdad2bab2884024b4932f23eb9811f6425dfcb35a479e64e94c86f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:56Z), 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/QZA7U2000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94048a15582549c6fc889b5870fc61bcbe6cb9f9b3a455b28d3885be8a71d274. 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/QZA7U2000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0796a528baadb40551e9ae4055497142951fe43c1066456c4208fb3f1a792da8. 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/QZA7U2200398.