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 0x12d314f654f08447afdd14ed3ff7fe6c736e0f0b698c459c62d2b739dfb9c763. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/564c1a1a-a4f3-4ac4-a4a2-15111e627432.json and https://artists.proofprofile.net/proofs/artist/564c1a1a-a4f3-4ac4-a4a2-15111e627432.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 0xad24c9db8b991acf99c18d23e1b05a22d84749df5cb5bdbfd2e4a4903c3a2a98. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:59:18Z), 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/BRD8X2200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d6beebfac4a5f9d6dc91e1e36e6ddb0735615d3c4bc29c51482719f27c850. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRD8X2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc81b632e7c0ac218f8c57f4792384ebf323224ef7bc530793f83c717c12ac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRD8X2200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2f792a451ee87a4f5f47aa99204387dc155b7bb4356c3eda9c78e2b8db2f2a. 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/BRD8X2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9610f1c35c79fa7a29316cf5b91a490b013a19354feabc8ae04c4b300e297a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:07Z), 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/BRD8X2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ebd089b01477336594a1bb96be1736cd631e0bebef2480bc97d8d1410ce10. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRD8X2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf335e2cd20613df9718d416f44bfb58bb16477fea508e2f64c34bc3a0b986. 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/BRD8X2200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff000f96364ccd7fa4ca30cd05f5a4dc7d377915f91d4e97b392f0ca6d3855c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRD8X2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8090916395f1ef88c5a38fc230826e60668181e5e823a237fcd6248c579f4b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US7VG2165975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddc43e64d7cecbb270f23b0e99de0f794288cdb5ac66beace06a486e47f0dac. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZGLS2538033.