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 0x0e698cbc19866687838a6ecce15d55987e79281aebb66c7f8fbd96d3d2f52897. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e2e77d6-e0f0-4871-a78d-849bdbe8ae0e.json and https://artists.proofprofile.net/proofs/artist/7e2e77d6-e0f0-4871-a78d-849bdbe8ae0e.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 0x471de14bbe3c109b8f130331a86b5e32fdbb3703a6244ffbd2636fc968714d8c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAENV2291578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d67e43185a220887a586abd5ba7a4de5859180eab3229672ba874c866831fd7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAENV2299146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335c8877443f1ff09f5531f4c153c43a49fda822f16f3a15eb9be0d07e983da. 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/CAENV2291581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c307fcd77f0064ea6e193fcf2f87a53c56aed0dafa4fa0dedba7673f0839a67. 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/CAENV2299143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b2029584bc5274ada92efa45c8d0ced294eb076694d6392a737f1a7d52d30. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:24:29Z), 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/CAENV2299144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7567d90ddd6fcc6b28c57a83872fc61dd2a72a528b1780c17c351738a2ca04fa. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:32Z), 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/TCAHR2377087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7428f0c338aefa105cf8bff05adf6e1b020ef14b873b5fbd54739d679f8e2c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHE2341472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6a9b576cb55c1ba1c912f7f73494e995bfb4c8f772f44fc4d48cca7085fe4e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:03:19Z), 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/TCAGN2291098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef15caa77363f789975c1946467860e65fe8534650f733ef2f4a858a1f98bf0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHE2341491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5158384d223c0e618632f81816681fe87059fd663779d27702b46934d5bcd33d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAGN2290806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a848aa839bb3a8cd27580a345098820cb6af216966289b324ffc5f3f335007. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAGN2290994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022a76c27a1ba6038883f7f4a4fdccf79960398e354e0755d65b163c966f834. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DE1O62470754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369318b2f5a59f813752d0353b8b87fd67646081afcd8906ea43ef47bf4cbc97. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:51Z), 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/DE1O62471177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230068d442bbf209fc74a59a0a6b58af2244258f5b6f4d95967a5aea49b1968a. 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/DE1O62470793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf696a9d5ff29958ad662a9f47c99443ee91641c509ba576e54de91425cf05. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DE1O62470795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15312ceb22e1b9eb6626ae699a289d12eea007c88b422bfac94b7ed1b53d73c1. 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/DE1O62470775.