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 0x3c776910761efe92fc33d86454af581fedd0bd5064840dcd0b51df7c2dfbceec. 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/3836d736-e2b0-4e54-856c-20e3d32035d0.json and https://artists.proofprofile.net/proofs/artist/3836d736-e2b0-4e54-856c-20e3d32035d0.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 0xef4d2162f7dae4c28f12caca3bf0a57be4cf98494fab1e14a64a12ccf93bd675. 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/QZRPB2159070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851760be6fde80f0f8632fb38a56e597484c78036de2366e5ebe361895f19467. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN62033292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57b6d233bcb25df9788627b1ec8e445e48ada436bf61c87f03abe2772f9bdc. 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/QZTH82112464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8f502fc210b0a04007075d7a3fcf7f730636c59d1e2ce22a88a2efa78024b7. 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/QZT852146340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d842746f734471be6f7dbe9237509d075037a6cad56a841acdd117cbf61bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:42:09Z), 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/QZRPB2157533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138c6617f9c156bb01502b12d18e57779afe87b55d4299a60316c44cbd1931f9. 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/QZNRS2003292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe56278eb9216e3416408a22457983cc5f51d8da82f5c832890904a7f71ab444. 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/QZNRS2003298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d0ab4bf20851161f5efb134506967c9705e487a6f69f43b82ea2542665d80. 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/QZNRS2003322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7616eff6c85fe728806ad1667f29cf2eacfa81962a371480ad84eb2b438a8372. 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/QZNRS2003325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff236c463e50efdddc2d3f8fc8c3d7e5ddfcad7781f4f6c4aec38a262be15f33. 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/QZNRS2003337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a7680d338d23b15069626bd7f5f0ccd7b8d10f4bb6a1e028a7e5a2b7c0d26. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:46Z), 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/QZNRS2003340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cefc48c6df937dbaec42e3ca0859d15ba4ed194dd5b15e1990edf5802fbcd08. 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/QZJRC2031018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff6c1a98367e6c6da730eb4308d0a051679e3053392ed908352eda1003f9f2e. 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/QZJRC2069205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c141e0873708b920844f22e1883bdc3fcb8178a67ad9aa489c3424d3eec2b. 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/QZJRC2011721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8f502fc210b0a04007075d7a3fcf7f730636c59d1e2ce22a88a2efa78024b7. 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/QZT852146340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38462ebe54e321c2a922eac495e37f048d3275221990d98e2fa8728adcef776. 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/QZHPJ2146901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc0c1ae53eafb8c715d5cc30521d3bfb67a0190d13c4459e7852d34de48e5e. 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/QZJRB1962573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a863d77f0d90daf89bb8b89cb76e2a02f65813073bf3d4ef3f575eb3cfb955. 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/QZHPJ1987165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6bcfd19ff324ced5129f139d0666dde75e64d9094c88eab28b095c27b08baa. 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/QZHPJ1956688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e09c0d07fc2763051a34e3b4bf99448c89f24849345a0b655e39eea9e9ada1. 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/QM8DG1988842.