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 0xe1dc503f377246d215ea4c515c2faacc21e20296fb7fe05f0a21a3b21e591789. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a0f9e81-f9b9-45ff-ba7b-03ff7da134a8.json and https://artists.proofprofile.net/proofs/artist/2a0f9e81-f9b9-45ff-ba7b-03ff7da134a8.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 0x4fd8b422576aac8e77496eee94d4181075ae39fcbbd66ebc8516c48a0e0b437a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/KRE022300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fafac02d010f1e9048646c2eafec299f983a6a76bfb67f6747f2d41824a1c9. 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/KRE022300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86783669e9125905829861453070bcedc0e94b35bca8a0b56f9f38a7b8ba0687. 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/KRE022300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc744176495f38227118c127d5621412a46b42b5fdb6e0dc7cbcfb4c3e03403e. 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/KRE022300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fc3ce3e8b40ecc4486fea0829d119a0d88250ba9c9f5ff5f4406acda6f8074. 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/KRE022300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70f62b91115b5b35ac272b98a28b4d896a2f0da7306365b39e8f253b60b0fb9. 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/KRE022300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e003bdd2a69c7624a698a22141675c51d5f65da0d7616ae563af6fc03ddab95. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/KRE022300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b36a046668987e7e805a333fbda92759c1526f7639f8f36187a7c6cd5394588. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRMIM2219894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5841e7900fe47630f1b8fa319dfb25d02eae4f55c0c24af4a08571f47ba1f7e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRMIM2182642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f5b9159aca73412e5eeb2db68eae50a5dfdd719981525e3fd63f1b84427322. 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/KRMIM2182643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b240c60ff7825d470e9ab9190991647a9d6279425a6b6a2446b607f605cbf9. 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/KRMIM2182644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703e519999e5ba63b881dccb9ad7326dad6e9d1116c66448fa0a49052da232a7. 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/KRMIM2182645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf702ce5f1c38936025490a64e5793107172e8687fb36365ca776611c39ac654f. 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/KRMIM2182646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8314e399c62c1c6a7c327066c7c677fc3edc651839953494987a52009868cf15. 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/KRMIM2182647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d77aedca4df4013e4f993e1376c919e78f30386443e00e3ac7ef8b87cacb7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/KRMIM2121798.