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 0xce47cef1c631aa199d713ee57d795a592eda73bcfe5c2fac5db3ef5df04fc2b4. 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/8a69b40f-40f5-49f5-9208-9b2cacd10ec3.json and https://artists.proofprofile.net/proofs/artist/8a69b40f-40f5-49f5-9208-9b2cacd10ec3.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 0x9976a5fcf52f7646640c6524f325f56617dd05f80e854e96437b1da1cea25d67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTV32470766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a2696a3e6059b1c320bae6cc59186c612419955a74622e709559c89d0f54aa. 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/QZTV32470828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5290ad3a9020231420a39d2c3da05860a9851759d268c19ab8b49d25b72c8394. 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/QZTV32471090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18edb9a5396cd1b32cb1a3ebaf3e49ecb477c3bf63e7b9b9bd7fef35d7fdfabc. 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/QZTV32471233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae6565320d2ef91a10c926f7249aed720ea429045dcb535324b9672d008611d. 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/QZTV32472866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68ae33edb40230fe66384f55ffa1304da363194e42dc19ebc94507df964e21. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTV32472972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e50387c60cecec4bd13266512973ced52bbf49aa9898be66a414ef749c1345f. 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/GBWUL2464856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700324d1e3179b6a54fed4e879f71590b1d8bcb23900ae74f59e3928282f910e. 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/QZK6F2313380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e50387c60cecec4bd13266512973ced52bbf49aa9898be66a414ef749c1345f. 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/GBWUL2464856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bb29c6a9e8e8afd9b8b981353d84ff38b0d6adb0ff2beef0b3f6eb819ee00a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ8B2391550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0647b0201a052dae05c8735a23dcb38f34328c17eec0aee82552562f83b84223. 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/QZFZ72395678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9fdf9e7da6a58676b5b55e4426a17beef34fb47349751d6d069fef37cb5569. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB42287552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf89cc4d16c502e6b3e5f47efa2dd19861ef9e38cd4f85e49170d1ee01ba8b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2218565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aab5fd3a7397dc157f222ab611701c030dfe7427a90fe29936c931fec60f5a9. 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/QZWDE2528665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab131ca15392c35f9430bb80d11d07b18e51fbf92a159336ae871c5027e27414. 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/QZZEB2400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67e60ad846d3d75c1095726fec3bfb9d2d86c1c3b6d2a1f3945af4d0e3d178. 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/QZZEB2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e32a343c9e1e5e876fe3c19c91109df9eb15a97b7b49fe8e6b8352808fc86. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ8A2414753.