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 0x8b0bf678b01ce0b217d6fe140211c2f42f55212797ec95e1a1f027163cd66bf7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9ecc918-7a62-46de-aa44-99debf9943c2.json and https://artists.proofprofile.net/proofs/artist/c9ecc918-7a62-46de-aa44-99debf9943c2.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 0x25c1496f33b3505cc1941257becf4cf177b6022b96bcc940e6012656bb3cecb7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWS2244534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0c61a3b2226d539e8e1e0f2d050cd625a3d131aec6b21a23a9633009616988. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ62568293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560e8e423ad04c257223afca53c9cd2dc541bf0ad800234d1bf9e9ec7ebca874. 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/QZDA72516831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c84e46e1dccb980d92d5a64ca924d22dc7b85371f4dd77dc3e08379f4f39d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:51Z), 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/QZHNB2546529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc038a32443a8439d1e4060962153c11be80141be872a8e65af3b495d3401f482. 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/QZTB52591955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00d4422cae5b5f6a673ccb4da505d134b60479f7cadc12e7f35a694bc57233d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB82542024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5978c5133dc7dd885996925d0f2585de4fac416f44e4a76b971a45b7689366. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTB82555587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae68883a01131d4b13e382bb3e9ecd8f57086904dd0c754064f46b015f9f95. 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/QZZ7K2590603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa578fb137261c5a6c0f25a5f3325fa23785c4defeab193b64e911bded128ad7f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:35Z), 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/QZZ7L2515399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb627e52810d5825a65be3aa4b6521e4e4b7ebc3c545eba2fb2b5a651318ff7e. 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/QT3F22500920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2992e6677bd45d09b4a29b48e126e7d8c4cc9f7ba933646d7dd20567931ce7. 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/QT3FB2548855.