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 0xc0a0a1bc137b487e61fe193a1fe3e6b6f7c7c99eeb447b17a35b591cdba5c50b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abfc8a42-42e0-4321-a90f-37c74869fc9c.json and https://artists.proofprofile.net/proofs/artist/abfc8a42-42e0-4321-a90f-37c74869fc9c.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 0xecad71fd15b992d3c7383cbb3b026987ae3a1bcea8c0d990ebbfc7c4cd8884e3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZDA61851790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9319e22b621dac92e6d0efa91d55e11c2219fc788f6d43991ac352fc52aee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:17Z), 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/QZHN42279472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4322ef036d19b9413cfaab26c0bb1fa746884301a33c7811326a7d8aabaf4e. 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/QZHN92294978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8479631ace896c8e1d49fed2bfee33f38af54238f38701e344e7ddfa7421f19. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWU2275445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadb35ba3c3448af011ab05d39e6228f89292c02579162269d2318d58f3c74b7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:29:52Z), 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/QZNWU2275447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d9fc64dae8b50043b93d0754e5dd732f2d688c9b55cd00ca6048e7e186575. 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/QZWFK2350286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5bdb633c40cc7cf5be08b1fc5358467df2b5625e3c2b600b08d0b67e54b99. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFP2388159.