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 0x2c07294300da7ccf32510bb6a93b9d32aceaabf66f9e9dff1975944a8979037a. 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/024b70a9-86c5-4ace-be77-72479ea9bc0d.json and https://artists.proofprofile.net/proofs/artist/024b70a9-86c5-4ace-be77-72479ea9bc0d.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 0x993480bed53c04c4ec88f318bb7edc713f3248e488ac28bbb923b79a404850b2. 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/QZW9M2253956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bca7cb7309d9e4a984efc9fcb262a3ea7824ab4eba29f7255b5ea5c50da28be. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZW9L2405518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bcbded9af630f71c4455f5a5440be13fd7f85a2595988646a44b3cfbdbda68. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZW9L2447876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4443751839dca06b6d2bd1b2f813ff038b1f7936c6f324763e2d3375c43ede6. 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/QZW9L2447879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fca8d05b4bd6a3078344f582a7e577d1365b1d69a480bba35d78183e9b19bd. 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/QZW9L2491815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4783de4e2fdae09ad0517413bb8043b77624eaf87e6429eb913e2e33991429. 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/QZGLM2544576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd405853ea4a64745576aa4e1e4d5248ead1cacacf95383b5d0ab5ee401314d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2556984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678da978264a98ec530c465605ce431b0416f135b5d55e16326cbc7eeb7a649. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2331600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4838e7c71514acc8ef55264112585f14affb90ddae91e2fc3234f193d9f9f666. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJY2382425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07650cba6be366210cec5cff9d289d4d536a7fa302fc47a891822f4f77348c9e. 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/QZW9L2350755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252528de487f7b180e387c4f324389c5faa0e0792fe4f124d767b29783c4ab6b. 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/QZNJX2464672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5978ecdffa5bafed5dd911833d9f4ee48e6feb874f07cd21cf4212c8b5be9c92. 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/QZNJX2464673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db18ff2d0e2f145cf1626631eff7d8b2e69087a366b1907790497157f0b8349. 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/QZNJX2464674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf39526fca0e7dd29c82f92880692f1bb67264eae452a41b19fee72d2f5a80e. 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/QZNJX2464676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84115d44cd989a4faf39bfed85bbb9b9d421dfd38bb66f3afd0990011fce126. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2464677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6018afc266fc85cbfd131897f624a0fa7456f4ceda9ce4a42ed144f865f45. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJX2464678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18851942823a7524ca70e27d1abcc9b86577e63f8d2d8f80c5a9c8bf8a1e5e. 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/QZNJX2464679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c35f37753a39a9e547c7a5d52375d18ea0d4698e26c810547b412c85c5ccedd. 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/QZNJX2464680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869012d439d13ecdd2ea7f45585977a85b3c9552096514e3754a0963163aecb. 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/QZNJX2464681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea941c0f747fcc634c5fdd451139bee1bda40d76ff0b52239e89ee2b8fe903f. 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/QZNJX2464682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a40fb8dfcbe0c2d91ea67ed777c3d7cf95f8b21e62d3a987b7db361daad5d. 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/QZNJX2464684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243b2b223fad18bbf436b2809306ba6b828ee2766187d23f0dd14158a1fe360d. 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/QZNJX2464685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271e6c7e0d752903eccc2fce4241f0263a8388d7c501e15803e78eb930cf887c. 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/QZNJX2464686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807266f90681727b6cd1fd8c8f253383f9c1b3df2287072c4b1cef9efd475344. 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/QZNJX2464687.