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 0xfc33d550fd5bbacd156deda912f0c0650085d9e5a47ba60802628bcced3b8695. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2ef2349-6bbc-48cd-bb84-5ebc8e3cead3.json and https://artists.proofprofile.net/proofs/artist/f2ef2349-6bbc-48cd-bb84-5ebc8e3cead3.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 0x3d75165118bca5408bd35ec88397cf9e6468d3d8ba4c2db2f4d88ebab2c19234. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/JPT552101161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a90b0ddcc33049a2dabd87993e1a8e0386a9600a0971046a070161c34f6728d. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/JPT552101163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ffb874575723a11b7f7443ac0c903e30e4197d2fea23aa02301b2e2bbe420f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPT552101167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02024189c42a3c0d274884d8e103ceee598c030036cbec1dc1c1c2f4f41a944. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPT552101166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40e47cc90fa0beff7a1973f987bfeb10067ba69a2434d8bfed68936a26e991. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPT552201104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350e10327af67607bbde32b7b1e9ca59e31daa6a06d50903464086dbc2f606b0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPT552201213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2883c57685810fc033e826b1dacf2b29dd6b1d16020523188079a98a8a1bf86. 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/JPT552300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d36d45496ba9fe1f3332d335f5f1cd2979849ba4a2afc8d17706630e6c228fe. 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/JPT552300673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef970d64f32f3c5a83f0b110c1d49f1667ed6b9a152f8a344a6865382fa01e9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/JPT552300674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60902bbd4e55dbd02fcd8cfca5513870bf116079dd5eb55744f3a4c6f8b81d1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPT552300665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edee1556086b6c93f90d041a1f0c226c29fbd35bbdcb9ed74703dcd8b477ee1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPT552300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027a00b0b3d01d0f0fa8735e5c6f32dd3b25ecb5c75893381cae76e3821f5757. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPT552400672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e6dfef0ccda33f695333cbd80371bf759a09b0bd1c3da850fb6b9460815e73. 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/JPT552400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037985cb5518ab4d61de4dc2b803e7456ead20b1961027178124825e9573c090. 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/JPT552500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c966356364b50311b96513fa87f57c2c5169c492744c886ccb9836d346b9b7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPT552500703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b877386d93c9a1b53e65aa0091402e8e12fc8737bb6945cc4193dce9e46686. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPT552500695.