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 0xa08dff9b710bbafa1b94dabaf18020ad583bfde29eab354b85d6691823a63c3b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0f818a3-8845-4194-815e-a50060214366.json and https://artists.proofprofile.net/proofs/artist/b0f818a3-8845-4194-815e-a50060214366.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 0x1904beeadf2ae9dd9c796f34731860f490bbde6694e5088f36421b0059ecd7b3. 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/AR5UH2300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc62a4c067e81ab4a139327bfa9e265506ea2990d0a01ce85d3f7079efffcd. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/AR5UH2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce80bd049c329221b6d1b17fed3fe149829464d8a71c9f06d7691b0f616732d. 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/AR5UH2300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4a5d884696ad821bfe3f6614cd70b5eab5eec3d03732c2fac081ecedd2c4b. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/AR5UH2301314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e41640fc859c1e41d9b44e9a7464868d339010cb971f6ae19a737ad5947cb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:56:02Z), 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/AR5UH2400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd39d6c33a7064dec307e2cbb04b9aa1eeba000660e5b4e4d7004c3c52accd6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AR5UH2401578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38d8a358a52da34b798aee9edbc53dc427988abb6819257847806356b29306d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:08Z), 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/AR5UH2502391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975a86dd5c3a4b9c611cf20aee92671760031ed7499331ba0da384fb6a017f2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:43Z), 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/AR5UH2502643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d54e63eb1c3368d7175935c82e4b9542a8a1248c8281482e6fb01daffc9b4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AR5UH2503191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe261cf862f223a237e08567db37607cd7f6acee85eab02f691068ec26c04b0f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AREA12300788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5233b32dbd5cd79ef76855fce5843142cc23ce373347d137fbb874024006a0a. 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/AR5UH2301954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f79fdffbade102608715af3836fa550b125d76c0bd61233bce09c09171b3f28. 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/ARF842400035.