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 0x99956853e9be5a3e28e41cfafbbab2c28bca792e049aff294c34046e472141e7. 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/03579651-dff5-41ce-a7b3-eb5275ad4b4d.json and https://artists.proofprofile.net/proofs/artist/03579651-dff5-41ce-a7b3-eb5275ad4b4d.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 0x662c429736c86f606580d943448eb8740527fa56ba7827cd413a1086ffd8735f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USDY41857239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b6b701e074e9b49f3035355939a05075f7c59087eccbd231769fae1662c5fa. 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/USDY41857243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca3440c675d0cceff9117f208fc76157226ecb2b00d93e6a59fb30ada84b9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:51Z), 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/USDY41857245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1080f547a519cb03a5720ba041b65cba070b223fc5ed9986f2276f442d71e184. 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/USCGJ2125622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ff045a9ff798532d81034eaadeb4ca8d89d58562c4e7a222db051cec76f553. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGH2139828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e12188481d3c1d4845c6159be3d3ce69eb672f5293bba33171530b3cdef7589. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/USCGH2049320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37112c443613b9eeaacddce8f21db15610485f2387a68e2a779fdb79dc4a78. 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/USCGJ2125623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda06f459f0f49026ffbeaeaf6b778ed681aad41f4610eb37892cd494a78d773. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USCGJ2125624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a2df37ca81353bc9ca5c9fbd280155a53c81426a1a047dcb8d54dc0652ae7. 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/USCGJ2125626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b240150a8fa39d6953b82e5d88e87fe212342ede79f1176593b0e538d1a6023. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:38Z), 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/USHM22212297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67aef363fd2519ba99dd63f4d22dd4718642f9209b949b4a2c0ea94e8b8354f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMQ22400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f7ee7f723b9e2ebe801b3806e4981a03895ea041549aeedd516d69a10ec95. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMQ22400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf29e1fba196a92117565f65c5b26e4bcb9933a65941cc70cc24a5260538b3a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMQ22400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f04eb2ed2950d1811aab3fb0f685559ea250b103d9c03c06580758db26f2c2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMQ22400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e2ee0d81e3de0328d96233efa6f083cb0f25b56e254757829fe8d4a419018. 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/QZMQ22400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e29663188d0432b87ba8179f8b50ad660f959b08e71e5937ed334448cc48a10. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:14Z), 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/QZMQ22400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fc69bc0ec550d624273ca411bf01ebb18b993362f8bc6f4a419366db16e41. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:08Z), 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/QZMQ22400027.