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 0x42607917bc8125f43e9e30475f90eb4ce9842d05921fbca37fa42d97e733c32f. 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/66ff8f89-564d-4b36-8607-b8cbcd945770.json and https://artists.proofprofile.net/proofs/artist/66ff8f89-564d-4b36-8607-b8cbcd945770.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 0xdfdf5e92c6afd8612cd6f729ae83db0055e45c991f342001dfcd6e108ea924ad. 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/QZES82209030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84fd212fa8f4986202641170cf59c8a45281f7ac3f0d4f3d217234ec7972dc. 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/QZES72274240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac7a822e76ef402700e8fb80efab59223fbf6ba77e27752e9cec3f3b650081. 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/QZES82209032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387bc9f0f1c7a2948add92e828b923d310d1d3218f8626329663df14db99988e. 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/QZES82209033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a158e726815a87c664c2607439577b84d939bb85b632cec11fcf01779e236ec. 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/QZES82209036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a5e4e1a6ef98807f419d7b64cbb5ae650a2df9aae61e19aa7c4d744e92fb5. 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/QZES82209041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94b4b174b666d08d5319ae68f782212b60434f197ca90a253f4c2d90328c82. 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/QZES82209043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99cbb802419d22525a2066fd274733ca35cd8d9857f57c2161171d04a97f208. 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/QZES82209044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e37b2e3806617a0b47ec8f2ecc3b0fc638c2fe58802cac6e221a4ccf3ca36. 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/QZFZ42261387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83083de9a33bb7fd00bf08735f36a26b284ba059543e477760e2c242cfe3a11. 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/QZFZ72072343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7e02aa19ea22195ea7b5c92614d35b8cb48c58078f045cc8d55a73f2e24f1. 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/QZFZ72072347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adca92cbebf5236af5a9277c468aee1dcb2de3ce1a55176a449264052d0706d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ72072348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00424a8cd76b6778cf126ebf4a9817d3ad14a88efb830c6eb29bde84406ccf8. 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/QZFZ72072349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf17888d743b7ea12f45c405a8b77b8e2d135b3d2583002f31d14f3e52c6cb18. 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/QZFZ72072354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a16f60065611ad3ef05ff35d7736616f231be9acc723e131971b1ab9e889c. 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/QZDA72381165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c84fd212fa8f4986202641170cf59c8a45281f7ac3f0d4f3d217234ec7972dc. 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/QZES72274240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e37b2e3806617a0b47ec8f2ecc3b0fc638c2fe58802cac6e221a4ccf3ca36. 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/QZFZ42261387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc499cda51db7caeb0574a74a1d31b4171b7ce5497cda772960ea16921d80e41d. 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/QZMHM2042231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a928bbbecb230184010c222cf56ddb83583574a333ada0a7cc3ae1287f10f. 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/QZHNC2249321.