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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51dd7ce61617c95ca50874ac763d47dd381f409ea1ea49c770f804994e6ded. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1ec0822-e661-4a7a-8059-515b19c16cf8.json and https://artists.proofprofile.net/proofs/artist/c1ec0822-e661-4a7a-8059-515b19c16cf8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25265743ad3fb8a9a1d2b2d4e7fb6113ad582c709b520b7f4859cd52edb11cf7. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZPLS2186373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734a7956e64767950c16b42c6da224d0850d00d4ff1e5ab798a978809d947f6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPLS2199559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b759c0bc97d2ee75c9bdd48a98c7f7e4d5d323a5b1e2bc9f8969e6cc72cff65. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPLS2199560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc9bf005925093657e8fda48b18a67a904e493c41913c3bfd8e66539072f21. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZPLS2199561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00680cf0093b545379315539a6351ed6d324055cbb6049dc33540ffd9f696a7b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLS2199563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71164f2c1ac4f4e845c44b276a898e6d13dc28bdd0fc7b752c1fac9dbde05f1c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZPLS2199564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c9bc3bb2daac8adce3b4712efedb30a67781965208c5c978735fc1136168f8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZPLS2199565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf9a5121cde4d53dd7d1aa3efa8cf10ff05b1989d607208e8cbd2c9fee302c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPLS2199566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0267b9f59afd1f838373155dd8a28d778d362821a827f4ca9438026412eff279. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZPLS2199567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc785c5fb4c560a46a7664c36e82cecd343ecd130940a1fb67a968ec54678d20f. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZPLS2199568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00680cf0093b545379315539a6351ed6d324055cbb6049dc33540ffd9f696a7b. 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/QZPLS2199563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab404cd8137ee99e873e2937170dffcb06e9dc60aeddfd4eb3b08e8bf31ab356. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTAS2193055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55954b46e064e678be64a53b110f5ee846770e2339591a59cb6d9fac185d6f03. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAS2193056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473505ca6cba4ab9e0bed54c977ba3c418d5518e8867c80c074745d859406c3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTAS2193058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde32f93adc9f227e319c5787ea22d47d2a4ed2b0926a8df44f84ab12ddc6d0f7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAT2166364.