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 0x373b63919e255f8bb0b56bf5a2f80a58ed8550169fce87ca39b1178f49ca2d44. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c5c3c9d-693e-452a-bf67-96d3ba0a8abd.json and https://artists.proofprofile.net/proofs/artist/2c5c3c9d-693e-452a-bf67-96d3ba0a8abd.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 0xe66eab81aeeea0c0bd9b5419b052b893acdb5ba955570730b03a8c53b76fa9ec. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/DGA0P2496162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac2d14ff3a6dc06a11bf5e90139a9aee947c047472c744e3085af2196781938. 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/DGA0Q2498601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd14a8240e5979f784d5c72cd5cd740b04ea836452d8bca6173c1085b761091. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:23Z), 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/DGA0R2431522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e080954c4b99c573a1edefc699b202c0913c7ae1545bc406261e06759c2aa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0S2473222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab52780e069b55d5189ebe03d33e25bd3c0a7405a0b02a2dcf5dbf15c7efce4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:33:55Z), 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/FR10S2570101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c24a5732d6d5a61c826402d0f8499760a63f002156a1c39213ced88f1ff5b57. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR10S2579329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a722f0ef9316a324c4b822273dc33b0cef39b2cd4187b9eb2c0d4ee79906ed. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:55Z), 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/FR10S2583649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085384fef4ea9519a910703b64a9f8b9375eaa7892871e35e23d90e627ea4cf8. 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/FR2X42542167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1683f63760e68e5e4e624b37233c68897f485ae5f556fb86fbb229ed5b08c7e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42569898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4731cd0f17a6bc6ff9e9ace09e99a5f9b0d822787217745c88e71acb0c86bcd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42585013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b014df5ae64f05b2e4ae01e80a08e78d4643aa6428f96f076a3193f54081441. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X2596694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860daae802fb668b14b25039296f784a709c4bd41e701445b21224ab64b48abd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR96X2599767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf80efa5a37ef71e708d29278f2d2bee55b6c38b9daccc27081d47f2c68fe9b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR96X2596685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80803c54fa2ff1800b1bf9be2d7373c90f0dd26757a990a27d4f7d12c74f42. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:16Z), 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/DGA052504872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a600649c6c0c83d72170df3e750c2032f4da75c0fb93f61064661691bb9a99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA062505860.