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 0xef200dd14ac21976ca2562bcbe016747ec32f29b0e9f48b49e3f0f21662c0007. 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/ca24872e-a9e9-4cbe-93a8-07d4b8b4bb3c.json and https://artists.proofprofile.net/proofs/artist/ca24872e-a9e9-4cbe-93a8-07d4b8b4bb3c.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 0x86ceba0e492e36568bec30ffe4294846d4dc387036033ec9e87c0f010a8e2b0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f8db27e798089c9c90d97d884e22e58afa0e181d1f5aa6298ae07200b41ae1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMTND2000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea9866abf2d72f18b7bd951aad6e538970e51a978d2ae8d8a7ec33e69d3e29d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMTND2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5069b2d02a3e42adf0f3704e2d1c7f8821c16f0a8f90ce3be7e554402ff39d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND2000227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce89f12428b74e71c9a8f000eb4770c8cdf760b9252a1f2050b377c0ed30afc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0710b5793b72a366ff7c60118ad46c45a0399495951ce9a48cd5622c5ea0f7b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c548fbdd7d84f6a7b013aae4d953a24a70e5cd5cf026ce36ba8e96cd211f0f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMTND2100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5504d596717fd23b822d8b5e99ecd3490007e6e9b669499c1a8aa770df2b6f9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND2000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d91b4dc13419652f252d97aeb72caa6517b499cc778261066b481e7e59f03db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ddf779c5787744a71c1585e8f0b66c2d751731d02657cb34d94592745b301. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMTND1101719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ecfff356af1b40c158c02ea3fdc2de6245f73179abf86d33c91386ca91a567. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMTND2000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226b77e0b9cfbf0cd59af2a60d10a5ca566c41510b3060e99aadb5197707fd44. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMTND1100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f99ce2c670824061f63c6c6c6cbbb17bb6aeea2199c8f332b44bb4758d983. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND2200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a854a242382f8d5b3a29bc3fd5c38b03c0f3ef78166b07a8554bf18968d102. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND1101498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d2745745173e93cca47fe968492f26b66f736831db91d8a8fc1b0463b26a5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMTND1101634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc815fc99bd38ea84ad41fb9413e396521a8876045f08592f33bc97018b02622. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMTND1101635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51839c64908323ae7f80dbf8e194650d9b529528718bf4a3bec7edfb5a812f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMTND1101636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c68d661afc5f5f63b9a8b6f71bb3ab55af37c4ce8ec08cc5cb9e658fc3802f4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:51:33Z), 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/QMTND1101637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43baf41b7c8e154bf3625ffa6d7c766778e75ace827d2f64b59cc2f89def2be6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMTND1101639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ab807b52af333b29bc39ed24b573c5716e51c879ec6d35066a3db78901bc9f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMTND1101638.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch