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 0x2eaab96a24520b4d725cefa4d3a19528d41346acd1d2b779c9382bcdd6529796. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78b6613b-c80f-4742-ad8b-a85a4ff880b7.json and https://artists.proofprofile.net/proofs/artist/78b6613b-c80f-4742-ad8b-a85a4ff880b7.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 0xd9c43b1a268aaa55e19fe9a85ce8a102cd431db10f3c94467721338706748b6b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62380828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff419676590b5d1eab0a89656c1845f380501836a7864aa89864c906b1276d0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ62380829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302968226311e766e56ecb311dd4dce4d414d1d8f4ba3e8a5d7ab54d1581888d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:02Z), 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/QZFZ62380830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9aad9ecf7718365a4266c0a398acad5367806cb57b38d753514cfdcef3e26. 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/QZFZ62380831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7d0002d9247c7177fba3711c79076546f55837201f1a478aee6897a0bbae2. 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/QZFZ62380832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022c433c548a94dbbfa7a748c354c5c6e2f7ee36cb85e0a0d404b9172e690e5. 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/QZFZ62380834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d4efc6b13e196dd6b4ed7b2dc426cc9f668790235150c93b05f9554390baea. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:02:01Z), 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/QZFZ62380835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbfab64ee7433787e5b03da96ce2c6f7551b0f6e5f814087daf51a419bc5a1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ62380836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1697d98a43543e4084198f846cbf54083978d25eb3869c7c7cc471060670c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHNB2433845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c171f2a2e020ffdc10bf8f6fd7c37174d1a64af2d0d7f618bafa52270b5a7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6Q2471469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5286ba73a87d54889135586c9bedf3aafcf77e463f01d8082f3b9ca71ff91074. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:57Z), 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/QZK6P2407414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ee622d2f04243906a40aa9bdf61e44925ee39120c24f54ba4e3adb9a2ff111. 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/QZK6M2414776.