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 0xa3ebad031e9f6ace52e1a371443baaf6b3ce4c7af9b1d4bd0853734c4ba0af38. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f919c66c-09a1-49f7-8ee8-7c964b81ecc5.json and https://artists.proofprofile.net/proofs/artist/f919c66c-09a1-49f7-8ee8-7c964b81ecc5.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 0x2e6daace33216d032fd20caaf69eb8cab335542aa1ee9cc221f51552377f3b1a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNMU2071266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1aa086d062d8e1bc5a4b22f8154cd04785ecbd3b8f6ccdbdcea6bbcb4845e6. 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/QZS7J2138672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad642606e8d33e41d65e226618d99eab00705541e7648d9a11d2af61811316d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMWW2076220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aa5f5b8dfd6a32fe8df18b548c1ccc2bb088ad76deff26150bfdaa8186efca. 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/QZQAY2157123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74058a2fa9df2f9e486cfcf4b73a13f241ffbadc77b249427f15ab511e4ea7. 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/SE5Q52400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4cf5a3a192c397830b3987a8d248cd57c035f953d65840db26d6d494b6ad0c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZSYP2206028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afc7c5cc7ac8259a160224360208dea01fe19b13366e81474c1f643e3ac3152. 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/QZNMX2202487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07039d016f649b67eb0e0c9f418cad0da3f9a34275771d859df046ac009664. 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/QZTL92154324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aa5f5b8dfd6a32fe8df18b548c1ccc2bb088ad76deff26150bfdaa8186efca. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZQAY2157123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6daace33216d032fd20caaf69eb8cab335542aa1ee9cc221f51552377f3b1a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:10:23Z), 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/QZNMU2071266.