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 0x49a717cc31650cc2c2b62a39ae0d29256cde37ee4447d2a09abd9ac7dc41203e. 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/a9fb2357-d013-4ae3-8165-5128190fcfea.json and https://artists.proofprofile.net/proofs/artist/a9fb2357-d013-4ae3-8165-5128190fcfea.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 0x4ef38bc8d566928bedfac4480d926f2c96c7d1478b36b4313bdd477669b48ea6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNB2150710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0625b5821b4e6b850b6ce3aebc5242ab5b16f814f8ac5df533c8f0466b0b543. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZTAU2114567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00240ebfdee05ac83fb2c1ffd51e65c496ddb83d5a96d5c9ceed73d88cadbc8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62243831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47508eb482c9cdc326375639b3f4c052659777cd276d22cb49ad680f1585eb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES52267826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd451e4417df5be2459e4ba24ac0253a96dc8ac6c404540303a1b659f91e5ce27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES62216258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0625b5821b4e6b850b6ce3aebc5242ab5b16f814f8ac5df533c8f0466b0b543. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAU2114567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a8310026513264158ed6d4a6ed728e738851017510e9f96097d0eb8ee44b0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZES62216259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaf959767fe74b5a0be9ec756854cb6a04776d2c8c77930b17b55ceaa0c3b59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62216260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4d67474505d441bc376b185d76b058baa348e9ce4e9403b7a086a8b34da567. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES62216261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dda2c9d8584605b41ff12b78002cf744baa6b0460e06d2a3fefe775d2f1383. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES62216262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ab4305b5163fc61ee66bbfc027cb9a6ed9bc251c5f48dc3d392a2a9287afb9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES62216263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00240ebfdee05ac83fb2c1ffd51e65c496ddb83d5a96d5c9ceed73d88cadbc8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA62243831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47508eb482c9cdc326375639b3f4c052659777cd276d22cb49ad680f1585eb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES52267826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b1940d415461d1a2a0c5728f85d4c50e2611bbbfa05c9c513127d712980cf7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES62216265.