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 0x99a5671626aa4735a5f128b191666f44762abf6a4e27aa596c2022df7701a6a3. 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/8bd213ba-b17a-4dde-a0ba-a805852a2486.json and https://artists.proofprofile.net/proofs/artist/8bd213ba-b17a-4dde-a0ba-a805852a2486.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 0x7998f8d937d93ee91e85e105ceea9abc8326a8d31d7a89b78b7e30c22f17f31f. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USLD91722130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b825985cd5853fd392a27af671e83a9b9b0c1e7d370ed50ec0a857c0c319c9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:55Z), 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/USLD91722132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4191550dc63e488359c29ae5f9053673f4c312f9f3d1d285521d0de7cb08b2f7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLD91722135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9568584dba90870bedcab5ab1e84eb25e08609e6c08c931dbbd7d4b3e26dd09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52260342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd99b787dcfadb7765a79ebfeb173358c985ca2961a6629162c11eb5b3261cfa. 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/QZDA52260343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b35d2feb58528e1d169fee5f8ecd35611fcc8a05982d6ba30eee73c8457ec7. 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/QZDA52260344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc908908ce99d11a8d367ff27554fd9328b8603dcc0db984c7c090a664496b45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52260345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ac60ae7d5251bc854688de619c295740fb4a8a63a4dd94e2d582bb4304489. 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/QZDA52260346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2810a55c8edc58bcc042ff71ac8baba36c8decc4ed204a836608a201ec46bcc8. 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/QZDA52260347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeead9dc3b0843f61e63fed634147823730acec622f5a2fea9144c7f686e6f4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6Q2102943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf438f6dc1342cf7c4411bb9f5820e42615f8da6da5ec6dc433adef19c873d45. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZDA52260348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8a6f11c07cab8ecde3b9372770b8264d8cbaf38636f438ed253bade58123f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA52260349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f856286d727c1f542f2dba485d51ce309c6e884fd411e0a9938bfcb4e614f7c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA52260350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223f5ff94566691e61ca36e5ecce78c0a8b6099776c1ede2ae11084d37dd11d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52260353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ae082323d9e42b0f5a7f7982ec8f572a694c2e67f77c176a90b3f208d83d0. 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/QZDA52260355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5cfee49ae13497e87aaac4c1cfa618da6d761a3cae4230ffa083bd1d4dc952. 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/QZDA52260356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ec01dec1d4683c1440da13cc3fda457127750db066367875e8e6eb099e85f4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:30Z), 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/QZNWQ2391628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264ac347d150aa4f297f50f0bccd8d959ff711dbd66f4c96e757b568ebb8c36f. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:59:07Z), 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/QZTB32441950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef1481efc6fa315439b6c8860f5d2b0f884cabcbd954981dd5e10506a679758. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1469949.