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 0x3686bef0d497db583e2bd8d1fcc739ae110d831990027ee9e87244cc2aa21d20. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3a774fc-ae11-4e74-b632-107138a0f52d.json and https://artists.proofprofile.net/proofs/artist/b3a774fc-ae11-4e74-b632-107138a0f52d.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 0x1d5384bb0b241d44c293639607fa5de6e5e61c280795a71d8a44dfb57a271bd9. 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/QZFZ22456220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07a03f59fb3fc1274adb947e4307a59c4eaff8bbb54853ef6c9e32193966bce. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:31:03Z), 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/QZDA42429918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f135a64131536ca7f173bce206e190da821829cc0c41385aa9775d0e05eb3ac. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:28:14Z), 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/QZFZ62489515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffcae5dec93c94cb1ed822a6582e94279e6eeb2afd0a215d10b70eab14498aa. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZK6K2427282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660d8cbc312dbd9b153d30e32d390a9dbacf0eab946d022aaab2d2a5aa27a04c. 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/QZTB42471133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11fbf864c328ff192b25778f7381b576fbb162324fd08f5712c1985a23e14e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB52476919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa354c1c927f2c6608d5e0fd51f392bb668448b1998aeb875648a3765c52bf51a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ7K2451439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4707af129c56637312c517e85ed5b8defd5d8d8290ff10679396e506a3d39a. 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/QZNWW2542456.