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 0xa3d9a02e8b355f438a290791d58de6362c94a7d112df200c6ca5987f5909df8d. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f65666f-44ca-457f-8261-dbfbd4c039f6.json and https://artists.proofprofile.net/proofs/artist/1f65666f-44ca-457f-8261-dbfbd4c039f6.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 0xc1639799b43fc10123483dcdd29861e886bc475eebc2123c98f550f32b3446c9. 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/QZWFG2407286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd4582e399e9510de978b346da9866b7267ef9151d6d217188aba2e29d82898. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:42Z), 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/QZWFG2407287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae1076cd56c1f48321c56c896c77cb6c6d89ab6d75f81c5f6396ad98568e13. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7R2408226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f3860f1c515df2dce72eed8083f822b725df579e91a51010acdcdf391199a7. 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/QZZ7R2408230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24f4d15a45f61e8a1ba85e093b56d5d98a8c493727cb8b20a71e2cac6849f60. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:55Z), 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/QZZ7R2408231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9e2a29324a434ad21f75a06fe883905bfba600897adea98eb3800c7ead13b7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7R2408233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f1daa1779369d2f17f8463ffbbdafbf919a77c949ba7b39f9270f57a57122. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZZ7R2408234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01c86f5f0cb6943807968e648483ae84b45361722ba9b02e52435c6acb704c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:34:36Z), 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/QZZ7R2408235.