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 0x8239b1339a4a2b241804eb395cf56af51374f9e914085f7fd68f291e0c318be7. 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/64a9028e-2265-41dd-84f6-f8093f713a72.json and https://artists.proofprofile.net/proofs/artist/64a9028e-2265-41dd-84f6-f8093f713a72.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 0x9eb4046330bab1a5e234a235c2541888bbe513a0cd07ef0ebdd15ee1d7a9890b. 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/DELJ81916057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e63c3906f5129d261b4724737aaa0d15423bc0999f155923b7285521d5332. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ81916058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715e63f851fbd6e024aa89f859ea7411e2591ebb05553f9970b92401d7b7c1ed. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:45Z), 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/DELJ81916059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bacedf25d8ae990baf0da2e833a211a4cbfde91533ae1e45f58032c283c8bdb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:00:51Z), 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/DELJ81916191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636b96c86f144b402e03c1ac9770d30eb0875a9de37e23e8c44b6df89c01aca2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DELJ81813189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567545f7eec2b6cbfa1b3f094a4e33ca9f6b8f85cd40c261e2611c613820cbe1. 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/DELJ81813190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4ac3473929f75137ae8992e9afe6bc9012b462e733301b2584b73f8ce35293. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DELJ81813191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1a3e6a8cdac21a5ff841d5cf0ea6b6a51ef567cbf9f5c1efd1b03ca880a945. 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/DELJ81813193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d65835ce1548cc09538c08991761ece9a515c8f3965d35c1366c9c5caef2a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DELJ81813196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf441f8c53583ad07c9f787152235dffb157816c836ba9c718752cf065e32ba17. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DELJ81813200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148aee91d5771abde8ba84c5913e7d812a6a096cce42bacb5576970a3ad5cbe7. 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/DEZC62513738.