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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f210bb23ff6d66e34b6c6d94a84b6b9c8f50e0f7c54c888fafbcd5cae07d947. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2410a02-fcaa-4e30-8c18-2d67f8a63fd9.json and https://artists.proofprofile.net/proofs/artist/d2410a02-fcaa-4e30-8c18-2d67f8a63fd9.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807f2dfb237fbf80ab743d6eb008b9e787da303da35795ab987d1dfefbea4ed0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US38Y2417389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b5b14d304b039dabc71e8830346024f07ce55f73abe667c22ad119ed885ba. 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/US38Y2417390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89939cc2096f3f1bed0c4af806a373efdfaecc520b5ffc403d9d742b2edac44d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US38Y2417391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227739711949732bc19491d8006b0e1a30df212dd01ab00e9af15496f0b0d10a. 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/US38Y2417392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179e528f4b27b06dd46b4cefb0af1073721d4c2accab18282e8e9fbf1df716d. 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/US38Y2417393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca86897a8c472bb0a67360ba252d93b5e1a829084560e6c59366d4be31c217a. 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/US38Y2417396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd940eff6b0913c050b8223995158ae10db1070a0ac28ccdfd990f77e5ebe6c61. 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/US38Y2417397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a1c7832fd0cb9bfcfd98eec8989090362ebd99dea915a841a15d28eb32c2f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US38Y2417401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42385fa684e4c1fef9da5a2b1f2aa666493a628cf05c50284e9233b59332627c. 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/US38Y2417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9bb9acbc0c920a5718496cc92580007741f7dbe019c49c83c01177ac866ae3. 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/US38Y2417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac26c3d59434f566b7b6a215bfa8edaef71cdb16332a21e65155a94d657361. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US38Y2417416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5a4559d2c6e1fd7b0be924e20467d3c9f92c9125806b5e89c25d312e0ae6ec. 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/US38Y2417418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4136fb0f9ed6afaaf5ce66051367889e23e4defa31a08db2063a44f107ab170e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US38Y2417420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e781e8d3e2e59e32e0395e590da671464634eaefeb0e4a68ae8599ce3ee7823. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US38Y2417421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf6c246d16b9bf4866c69410a845c8cda71829846d22003088ac5087a681da3. 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/US38Y2417423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29ecf7570c5bb2530dd4da92c4755f0cded06bf16b36904a811889e333f3194. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US38Y2417424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef9fefbce47551e2eb59d34b40a491eab3ea25ce491b3a53b4b487bbfd6679. 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/US38Y2417426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc15bb166641b048272b6788157bf44512a50e2276150be508565d43396073. 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/US38Y2417449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8208cb5e3d5e7d2ccc0b46f61cd50119199b79ec27098b2bb0ea037411c73207. 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/US38Y2417451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51e40095419c4497be900c2ad0fd211c459926e1ddfba0c853477ed29f1d51. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US38Y2417455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3b003df180f9b6a169943cbe8877063d2d49379d754b79e867fb235a7b4df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US38Y2417453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c695052454263f104265d46ec36619a5e9af3e579a4593cad9a93f6a7be471. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US38Y2417454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc15bb166641b048272b6788157bf44512a50e2276150be508565d43396073. 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/US38Y2417449.