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 0xff1dde88ca6e21f217d1f27a20120d756a0e70d5897465bf3a545d9f9fe95fb9. 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/d84e6dfe-9636-465f-a7c6-44df28222ab4.json and https://artists.proofprofile.net/proofs/artist/d84e6dfe-9636-465f-a7c6-44df28222ab4.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 0x939c74aca8ada582cdc0e2ee341fcbe03dc88fe8ba0f9e706b8704b27da37eef. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWX2478355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b71c37901feef70d138367a3a540de8bc377d86062ec88a2f5a9c90ffa99b8. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZNWX2478358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf492b486a026b1bfc60534f73c45c67b22f6ddc6ed5d7320766ffab94f20603b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:39Z), 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/QZNWX2478359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0230e59d370b2290fcb024b7fd05e0b6f0a458bff87dd3d09403bc89d7fca0a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFN2455249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689c76c16c16b35eaa27301a8a24df195d4ace77375381a176b3106cf6d88159. 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/QZWFP2438882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53129f1b1356257399f9388f562e43dc285dd443874a2792f10d3a20977a877. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZDA62545818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a64fab35b28f7d0e9faa776a45a1a14eda1216f2a059f8eead82b0693aebe2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62545819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096e0844935e52759f5b31776120ea9705a6eddb0f29c488d75dd878042e2e5d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7X2440423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d8f5c7dcd00f00f2638c739672bc4de4e718ae5a0caa9494f96c27767d0a0e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:48:09Z), 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/QZK6F2582904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ea69a9411dd93c768253456bf377037dc3445f55f432409e7a5f332aacafff. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB32526476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d8a1641d64efd922701be547dea9878e7c09eb5c6ce7349182dccad774cab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:05Z), 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/QZNWX2478361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0cd0208af81737880cbbd0e88b4e2ae083426ec5f02be31cc8c4dde2e9776. 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/QZWFS2593988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1e2b946456d065bd6f46667ded4f2b326b12b031a3a75e0d4922b40e2e9366. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFS2593989.