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 0x812e042bac9f59d646d17a1caa8e3c4194284da9fb21e61b56c33fc98e68adf3. 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/f03122f5-c80a-46dc-b491-db3b72aa0cfb.json and https://artists.proofprofile.net/proofs/artist/f03122f5-c80a-46dc-b491-db3b72aa0cfb.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 0xffdbe7bb2ed464cdb6313ee52a8867ddcb1b33fd3b9fcf386616e508b2149192. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:18Z), 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/GBMA21905386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf850a01d1698b18e70436e710a070ba4869939d33aa828ecacd3b91c2ef107f7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBMA21895782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74a8d2491a582cb31a6dc29e9ff0ba61c03a2fc14a4b316631fc95a3b5143f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBMA21915268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745adb22d575bdf38333d41f138731444611a1b63ca9360d14651edbe11e0544. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBMA21915263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263cf4f017f83ee91a0f2b05041dfcffccf98f6aa98b9d81b1967d3f4663adf0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBMA21915261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4f04d9a63e524a006fcd63946ead1e34f491c747ca16684250ddb11177228e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US3DF1958125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f911774c6c329a3a73d228be3217657d2507c5dfa4a0457f9f770314142444e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:05:56Z), 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/USANG1901111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deb81286819a4c827a9286bfe1b2a50e98a6693deb352c3282438d32260b63c. 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/CA5KR1973772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed827969ddd6d74ec638aed21f1fcbe53ae5d1f00eb46d06d6df68143d0fd53. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/CA5KR1973774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074f6b7df392be00dbd775b5795cd01492e9af2a22c6b3bd891f00f9694c1e6b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:41:02Z), 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/CA5KR1974919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ddeb18066f74019b161e7dbfdacdb523d135144b9985772bee1439510b258. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:14Z), 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/CA5KR1974921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b1b25888dc68371b71008756b34a61b85e88e1fa5e5dc62e8fc75497cbfb6. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/CA5KR1974923.