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 0x6619052d47030db929af656e161ff5d8faac4a5395c47e53447926f27d63607f. 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/d3e8ed1e-c6a3-45b4-965d-f2dac542b3aa.json and https://artists.proofprofile.net/proofs/artist/d3e8ed1e-c6a3-45b4-965d-f2dac542b3aa.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 0xc18aa2221fde18f91c8e2db346f97c2ac72a9a00ac1857a74b8be2d5e2cb4623. 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/QM42K1961506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971eb30627e82c35f8e18b24bd8ce37b7748fdc30607afb8b1f513c78348704. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZS7J2238251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0227ba40651fea7bdc213e1d4562e57185bb2369c355a00e0df6de26bf88cd4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZSYP2251383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b26ba659e4bb9f025c4eb83caf2ff53df3eca8361f7bface45eb71bab9f7c. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:38Z), 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/QZSYP2215714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844672f89763dfea0f5f5f733937c49a4fffbc16d2a5f2a26bd7bf287f350c71. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZSYP2244222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa9267abddb7e8d82341ecf1c86cbc4fad20bf6d63e564f693f8145a069dda3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:14Z), 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/QZSYP2232000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a82dc31daabb64312dba278c74d3c718bfa36feb3a10d8ac065040e77c5790. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:33Z), 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/QZSYP2286828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c9450e4ed7133001823c4509e6126abceea5a5c2f45ae138770184c567adca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZSYP2265364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a6ee7c44312fc860c20bfd35002983872b0b4d379066a5b63ecc9e6e40dfce. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEXC82400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751d1c158ac069e20264afcee2f1ac32e03347b65ec9884746ca7992d7a4095b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEXC82400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a6ee7c44312fc860c20bfd35002983872b0b4d379066a5b63ecc9e6e40dfce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEXC82400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad4a677cadfd8fb722f357ea50a8f8ffb134aa46c8d387e18ef4ee7e82403b. 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/DEXC82400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298272f1acd4e9d35b5c55362374bdae2b2dbe19af087dd976acb5b09303e619. 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/DEXC82400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e3aded86e17298d40488abd082acb36436bd56ed093060bf21b2f4f3a30fb0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:23Z), 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/DEXC82400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbc3ebc351a9f86f5bcd148dea4beb5e41729d40f5c95bb62beeb6aa9ed0e50. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEXC82400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425578f663928e03482e430f030d050d976aee7c51affeb0debd2af85ee06581. 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/QZAKB2160317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374d7bff5e3c0d8f37961baafc08537c3c7d9c1a2bf98d91b32ce1b34f63b209. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKWA62200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91f4f00341dd1a1ac907cb1da9e5d35f2e175ce02c6d0691e8798a011a0bc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFF2334500.