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 0x2fb77b2d580ce9743f58bd3852ffbcab5318a9464208233b55ffc0342bad1f8c. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b463dd07-9f94-4b14-9931-9ad1fe136bf8.json and https://artists.proofprofile.net/proofs/artist/b463dd07-9f94-4b14-9931-9ad1fe136bf8.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 0x4525fa7ea2a348aae3278d70858c1f15b2d9c71a0aa4100c6ee3da029e53a33a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US25X2105738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d9292a5b77c0875778775ce4798ffc54f5beadbf652e3ab074eeccc4df2bc3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US25X2105740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fcc542a903a5dc9cd93b60ef7d6b468097c565e62b2a9ec01283a4752e899e. 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/US25X2105741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389224560cb99369c26c771c7794a4c1ef25032a2c6ed4047472b0729e02a93b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/US25X2105742.
Anna (Kelvin T, Teya Logos & DJ Ditto Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28ef99ada285a40d564d5196220a98d9905b292e1ffb5856cf2931caf7c9a5. 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/US25X2105744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1400fa951a40735f996b8b44c27b79ea679c2cf3ce8349b18934703ff459f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2153832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4ed54fb02864a884647d5751d01679b03698b0e13f294a0a20490e3b4087ee. 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/GBKPL2153833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955996bd1f991e9f792de2ae91610324834aea185dfcabf05b06c9bd344eb485. 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/FRX872108499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad0a246185a2d6cc9765742619983a94e903baa26241d9bff73ec9aba49f58. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRX872108497.
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 0x449537ef5f1bd82f79c423ad1eda3e40aad02f3ccf10d920d63045a391cb8d2e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX872108498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360517e5d92c4f73eac8581056fe345b9564e28b90f037376164b6abfeecf800. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX872108500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc57ed4e6d86ed353a9f539806ebae39883755f2f9b24d3e218bcf310de0baa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X41849075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f2fb306d11fdec23b1eaca7905f12ae6909849f90cb329aa8ef5f26fdd925. 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/GX3Q92091923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75977dbeda71fbf05712f35e81b3e675c72dab747b0715625feb1ac62579a43. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:34:01Z), 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/GX3Q92091924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4cedc8f477df975f47e4deed57327d8680ae5136c8f850a85dc62040423115. 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/GX3Q92091926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259f77d169d6ac9c6ee377ceb59fcf5bd9906508eba87b517931e1aec53a83e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM92150226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe9f8ac823be547fbd4b8ddd301ce31fa565fe913f8f18b659f7a8b7e41e8eb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM92150232.