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 0xac452fb60b95e2fd82bf5add2a76aceca0327691719d94a4a99aa3255a8d39c8. 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/b3ee6587-2979-4330-afd4-8b8135c4f901.json and https://artists.proofprofile.net/proofs/artist/b3ee6587-2979-4330-afd4-8b8135c4f901.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 0xe503be8de036bf5e6affb02a103c879c26816269fde758db45c40bc39ae6e1ff. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:15Z), 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/PYC842501227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c80de7dbbd22b903d01e34893ebdb556fda2242bc2b5226cb7319f34364df8. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:34Z), 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/PYC842501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4143043edf6276dce61ea44474211f9ecb21bf55e95eaab9f353dbc6ff15904. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:06Z), 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/PYC842501232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ce0f8bb941e1ae3fb4711dd39130b04a5291254dcfc139ad9f88dfef82cff1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/PYC842501235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2b071198136b1ffbcd541c1a1a350f342d3df68c257b8bdd1c6dbe55ebfcdc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:22Z), 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/QZW9K2281386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e864b99412a7e0d576df679f995a5ca920061ea882f240df89173f573470f. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZW9K2281387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6278d5f4dd734a621759b6d7e9c1ec7c02cb27f4a273641e74f12a3923e1a490. 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/QZW9K2281388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56058a58e50de91fed641920f67604e7b9bedfaf9420aec6d7e0d09220a8f60f. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZW9K2281389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d323184f2c374b6c74442b63dcf3671060bd795036a7f25f1717e8417fd90c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US7VG1870480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b455f769ca9830f23314e37841cd93a2bb61809d729e5df78ed3a14e0c8a5e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US7VG1849876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b455f769ca9830f23314e37841cd93a2bb61809d729e5df78ed3a14e0c8a5e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:44Z), 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/US7VG1849876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651afee9919b829f0ca7ed41621d59a847bca2c28d5354d3ecbbb421fb9acad. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/US7VG1873462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf11b1a16f8f21caa57462d2f95b47aa366c1e97185f4a3c4f49dc34fb1a67f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:35:30Z), 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/QZ5AB2019691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbefd6a4e7ef83f62cd020a1c34ecd0700b54c1f3e8416786670e0bb1cedea8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US7VG1870485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e170ce031d29f21859ea2b103531d98185ab66f1c7b932c41faf465aba19f1c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2080031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d323184f2c374b6c74442b63dcf3671060bd795036a7f25f1717e8417fd90c. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/US7VG1870480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5610a571c5b9615d4f03581c24c2b6d34595cc1ba7d1b6b2d81a9dc6fa9ea460. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:58Z), 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/US7VG1870487.