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 0x87f1fe28c5dd1a38f0edf4903208234ba8b23c4b008f702191be6d23c10a3962. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/add0f22a-767c-4229-93c1-6105ca7f0ac8.json and https://artists.proofprofile.net/proofs/artist/add0f22a-767c-4229-93c1-6105ca7f0ac8.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 0xbc7b99fefaf73bdb671cb7729f1337042e3a121a2cab49ac395b18379ff1fa72. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:56Z), 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/QZTB32275009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d241f51baa9482b7f845f7f8a1214386bb91587438436085b431b40b47e96a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB32275008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8569b3973fd82c4ab84e6e5726b46a1080b558c6c7e762cc6074699859e0a500. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:47Z), 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/QZTB32275010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45933429960bac1173d9f0bc550ecd5724fcf2a1ef01e2a993f91f1f9a0c6947. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:06Z), 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/QZTB32275011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47baf7db95e2be1c5d79426493b0d6d7eb8a694627437e5260a54f9ca602d1a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTB32275013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a638008ac96864d03e60a971961444bc83463aae58d15a92c4a74970e7c31d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:00:33Z), 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/QZTB32275014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74f454f3d31f67b8725e5eb3cdf9069df79f6903e7337bc3401a60be0f9a606. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTB32275015.