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 0x113b5ec8dd7ed04172a6e367e2b749243e6a5d9f716a0810f50ef4436384ae6b. 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/6ea483e2-a294-4197-87c0-d865005aa5b4.json and https://artists.proofprofile.net/proofs/artist/6ea483e2-a294-4197-87c0-d865005aa5b4.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 0x123f291019d9077977addc8050921248e64971999909a03eb8dd057dad77c50f. 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/UST8K1532741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb0e7038d46ffa2cf635a2c2c1d16162ff210bbdd38f66b4475ee81728dd4a. 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/QM4DW1587323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8420308585405e6129a7b33780bd5b662d2444769e0babd89cde45bda0ce38. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPKX1665094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57875127de707d2dc3fff60dc720f1369bd45924d4249070dd9545dc6d68f68f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM2PV1620865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e65d4a592d65b4d6aef8922a8b83f53061f01fb03ed6d81cf3d1ab12bcf1bc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM2PV1620866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa351b6601aabdb499d2b0c7090287b6b1dd418dfdc3d63c43cf09a7e1b414c8a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZAX41803001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1494a802927ee35fd954c89cd814e49ce3215c656e3f0a0478564ac799ae705b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAX41803002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2007ca5cdf95b9e198be181087f8c0b8a5f866ad85eb48186941ffc92196409. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZAX41803005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e1a81c015c97b91f4a2aec30fd4df76479bd9addc3c4387590b8e0e92a2e3f. 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/QZAX41803006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f421617ec75b67ea298c358417fd55b1628add10600e0600594206f88e4fe. 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/QZAX41803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb0e7038d46ffa2cf635a2c2c1d16162ff210bbdd38f66b4475ee81728dd4a. 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/QM4DW1587323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8420308585405e6129a7b33780bd5b662d2444769e0babd89cde45bda0ce38. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QMPKX1665094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57875127de707d2dc3fff60dc720f1369bd45924d4249070dd9545dc6d68f68f. 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/QM2PV1620865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0402f8c146c060ccfb535c784731fe6cf9b3383ec0a67710687da5560543b6f9. 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/QMCE71302681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514b309e194db3e60c3c8187c4264cc3d5bedc4325f3c70d941efe9977fb70a7. 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/QZFYY2367201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ad2b834d5cfc44922340d0192544c7a99119cc4b61d09461200dffa6fce529. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:22:23Z), 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/QZMEQ2342721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd789110e37cf53394d174ee6ee92d2aaa8e7dc96a729a32ca4cef20b757ebd2c. 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/CAQCK2100004.