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 0xf460352baf9ea1b4d25082cf181b6170bbf11108b75b7455ac69780289c65784. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69b8ec55-0bc7-40d7-9b64-dd2431fcae06.json and https://artists.proofprofile.net/proofs/artist/69b8ec55-0bc7-40d7-9b64-dd2431fcae06.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 0x3b159b1f819540ea44d26e1897ab8d9c3c15ceae972df0246c3c7365d186a1b4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ8252204565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406779f9967e2eaef1cb5df7280964ac7596e63a312c1292a28ca90e830e187. 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/QZ8252204567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5955a69e583f418eccf5837d3e95cbf327d5a4e3eccc79b26463f9e221720419. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCACG1567946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e155fc764a957fd849b868227134fe350bcd501f507b2e26a11ebf73d0a6b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCACG1567947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d87243f659557f9b0a754274de9cc74fb88e7fe089fcd2a37c254a83f9276. 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/TCACG1567948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce70f7798608579ff82410cb0d81c7d40b2701fe8f9e4641a5fb886dbcd7f2. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCACG1567951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc214a7fc48da40b7ae04fc203798a8aeb5a06e74b481d57bec147fdcf38f28d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCACG1567964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89015930d5e7691ede1270d8646b2545b4a8b516fc65e58ac978bf9e2961dd4b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCACG1569231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b902af9855da8700942b1ea28d093cb770f1f0b41fd3cecd5146d9550cba44. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACG1569232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4cb819de4946116a432e40e15d63472e06a92ea450831e40ab69c5b1ad4f1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCACG1569233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf6173d111fb960d35992ea11a16eac20ad13d47d3c0cb8e9571b728f9cb06. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCACG1569234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16938bd9ce1c366f5b0fb6435be789fd8b34df56863d17a940f956f99ea774b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACG1569236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8087b10eae21747f5803f0037e67f88cf61406b0d61e5fafa22612420d5f9b17. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCACG1569237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb9b8b37228d114351ae63c0952ed120c16f1023549cd29935dbb2c3afe3c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATC011900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7083b892520cd11d8f56ac601279ab96ffb6daaefaa36b0e603aac4adfbb0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ATC011900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb678ffd9fad424ad7dd15ac74dea02dd133073338f3b659c62a66a64ef1b7f2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ATC011900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fbca9746ee15c49a58086997d8f40c630d7f1a92fd495149edd2fd3b5aabce. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ATC011900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f00093e6c4fe76a448b3c89775457512a5a2e78fcedd03784a478471807102. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATC011900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da3579c739a19a4910f05361105a2b6a2651633cf1510cbac249097bd1af624. 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/ATC011900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6a2c02e8d678e025900e1763c13be66bb955f1ecd6df420e05ae3af589d27. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ATC011900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41316b8915ee2e9f471aff21b01972639a1dd1322d53746dcbbdff077535259. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL1042006208.