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 0xe6a8807f63143d7099d8197ee324e76553a2d3bc0f8c3e2903bb85c13742cbe0. 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/567550c6-ef7d-4a0a-95b2-6287a78ea85a.json and https://artists.proofprofile.net/proofs/artist/567550c6-ef7d-4a0a-95b2-6287a78ea85a.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 0xa0a4f8fe9285648683b005bc7349365f420d4b64549aa88233369976c4081491. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/GB9TP1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3b725f502d6b4e6d15d9a05da8700099ed3885b1e2f3adacabc5562463aef. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/UKQNV2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f0948a55a1fd29b15a8dfcdd8373773ba3bc1c56099be6b86980e4325a290. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKQNV2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3b725f502d6b4e6d15d9a05da8700099ed3885b1e2f3adacabc5562463aef. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/UKQNV2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3a74b437105ebca027d39bcef92fcc49f428174442f22028e1cd66c450c7b7. 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/UKQNV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93288b763ca19d543a92dbfd47c1a8dd404a7bd1fab015b3e67c026751844cc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:59Z), 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/UKQNV2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d9f4f2023c9f609adf1549ce5ac6c4e0560ede7842b12deb772e253cdd195f. 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/UKQNV2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc1ab618da885c0d9bd09650c6fdc5bc31fb1cff784f42d04fc380be42a775a. 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/UKQNV2100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf57d517bbf7f279962dcb07f764dc2cc6ce5ae9626dec0458aca8cf8d087c. 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/UKQNV2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bdf121c498a3ac5610aeb6fcdda0a51577874d6ddd0309ea8724a866c230fd. 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/UKQNV2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d232e3151cf7a2174a0ec433f51a75163a9efb93955d0445af56fe7294e8ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P42476561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76d0cd5f6b2999c8125261f14069da284dddecdb6cc8c0b55a5bf45bd887d4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM7282420689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce05847f90e833aac7e45bfc867f7a71f513ee25a98c3a6b6af9a7f0cef0bd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM7282420738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338262630dfd3c23ba1a8857c0361fa90377bd33aa8533e79ef7f45cf21d981. 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/QM7282420754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349228e1e84ae362e82492b5661da0f71990326c79da2694572a92f0fbb63906. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072163831.
Hardcore Will Never Die, and Neither WIll You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a609063ab5cb01e5797c4ced2c31f75a6bf29558d932523dcd9cb4cfb9b58d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDE2313316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e69fb1c013f9a0be895a4e41ecc5dd433cf00641ff6c69c44b57a118b208a. 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/QZFYZ1902332.