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 0x873273c8876c445b86297dabda49df811020562287c7016c026f7ae368761513. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fb2012c-c5c6-4222-b92e-b9e8d95c7d1b.json and https://artists.proofprofile.net/proofs/artist/3fb2012c-c5c6-4222-b92e-b9e8d95c7d1b.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 0x936e756492f56f1b42f9fbd1f443d887de51175ab4a03295f9de8c6ed3f98bf5. 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/IDB772109240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97eed51dd6d98c1739b11b0a1ac53dbb7f93eaaa47bd64078dea0ee54b53968. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:53:06Z), 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/IDB772109458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96fcca034745795b2173cba342d52fd2215c86c2e07abd6c054fbe42cae21e9. 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/IDB772109900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a86bcf2deba4994943cb8bb3ffac8f0d30c101ff43bec516ffdd13911901d5f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:11Z), 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/IDB772109909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdc325eee1984eb01e3b1d735169361847045eb2cd50ce6c40c38f3eb82ffe. 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/IDB772110309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69188dd771a7b36e1d5d7a12ad22381bce8126752964ecde05e0825745e45ed5. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/IDB772111394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d702756e2a6e675ed56e283b28a5b9443a28c48c421c98347fc947e10d8e442. 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/IDC042510417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0cdf1316e9d2c50e476c7db382ed241e86173cdedea5ee45f48b62e99b91e3. 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/IDC042510511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cca33057e989ad504ac4c3961d56a6b8e4e4093a1553b3eee06921b456dc40. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA052587564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb97c1ae8e7aca44a7ff4ce2db70f6131c1d4b39f3b4ea362869fde8f706b0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IDC042511917.