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 0x50bd3063092b18b0f7196e1656b2d758b4b7f1d2ce489a0ea868dda6bcbb71e2. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6cd96e7-1794-4e17-a42d-80b5a0ad8897.json and https://artists.proofprofile.net/proofs/artist/a6cd96e7-1794-4e17-a42d-80b5a0ad8897.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 0x983c202cbaef3a05a8dbb4907a319127d493c34ca689783b5c112472864dcacd. 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/IL1042406151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564b0aa1f943eeedd55659b36698b96e56b9e3bc7c33ae2718ac41b8be8a53f. 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/IL1042406152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c05c2158de36ead417011d743d2ffbc340665d82469a57f207fa7e0c2213d. 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/IL1042406153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2123ce5e1cc7630e50f30ea7529940b5141bbe4b2f7cd93cec49f6f22edce96. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IL1042406154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347a48cdea68f49016b342b52bd28adb411766e07874b4764fa810fd87dcec5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:06:06Z), 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/IL1042406155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859e8949614e13bd04516a5ce38be0d81da59f38f8e07f70dadd474e840047c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL1042505051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ffe33d920a40394fc879e4c7e657b94b4101d7e4738785c83615a2402f203e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL1042505052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd32d201cd91575dc7bde937f9ac5bc74ef5388986667d1cb5235169abca5837. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:59Z), 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/IL1042505053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bceb4d76b16bc1a2a825af299d27f81c8300cab854828b1d43bd65e39be3c0a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL1042505054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081dd9bd2527f0011e05b21ae82da3143f6d5c204bbfbdda45ebb688539e8f45. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL1042505055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787c66af75dbb809686ae8723c0fe6c1341995bce8abe53f616b4cef7c679cec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL1042505056.