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 0xd608a3f9dd1096d57f7d35b5daa5840ab89018de185ced7718b0356b12b04c11. 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/1cea030b-ee4f-48b3-901a-26319d66aa40.json and https://artists.proofprofile.net/proofs/artist/1cea030b-ee4f-48b3-901a-26319d66aa40.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 0x823bd2c3282324d1c357586bbdacadf0dd7ff943c13281f765c99e630dd05584. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE1000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53656f371f4c8779f553f6595bd471348018de8bbeb8649491d45e927a79323e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USSUX0900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee70b74a5e7a5e7965778a9aede68619fcab611d9c4bf555a1fd8ae521e33ffd. 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/USSUX0900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3fe70efbc377048668a0ab0400600bb640f7188b10ce489d810ce9db989d8f. 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/USSUX0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ef7aeea629f1bcbbc43d0488ff2ea6bf240a85de4e1f2a297346f5b77f7f7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USSUX0900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7be6d6470efb00b8e164c2417dc16b9073d757364867bf2bedd8340c75336d. 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/USSUX0900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46b5ea36ba3390571cafc49edfa2917535629b023672343663e38e71bc7d0bc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSUX0900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefed3c74edbda39f662aaebcd30c932f956c02ef176ccb42d1f40f0b91a68c3d. 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/USSUX0900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579b27ac9a3f230f9e5c666547cb09e84149c590ded07925326b44095ddc8f4. 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/USSUX0900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cf02e1ec76c91687540c3c1e94ca4c49124cd0cd9b90e52a958397558594d0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USSUX0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd503f62c407aa67e45582237e9513a5d622598c43696f978b05ad3587b66831d. 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/USSUX0900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af7792f80b895f43a8e9c3bf4b4d6f5bd948978634402c8b808bffa61074381. 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/USSUX0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172e65039feac47cb40f949536b80d55f7f610329b133a2e2c47fab13c3be21. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USSUX0900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1294a60ffb09e60509a775808fa2b9be8ecff54d77feab193587ec30d27b3e06. 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/USSUX0900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6117c114990a925edcb65a0adc6b2a4f6b2375c084210c87ed8d6a935c5d6015. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSUX1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c16960d06b175f1ac1f9c094c8774fc0b126ca2f277c1b9ba62a796f24afe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSUX1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97628ae977d6abec989975740f78d4bd0fd463788f561e5c87efc9e63cfebdbc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSUX1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b081b4f57a2970d8a8fac5c2199aca207cd4bfc959b15c6c0047e48f0f33aac. 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/USSUX1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9541adc8bea6dd799409237417166ef31510a67ce915ee64a60018163b80b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USSUX1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ef23ee1a5208471c10d3a7a39ef2ab7b125749324a1457f42be034c39c7b5e. 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/USSUX1300008.