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 0x186e8cc272ba45008371bbf34cabebb6696467d3620eba7121865f501b224d86. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48f62355-60b7-4e70-9668-12b6afa83719.json and https://artists.proofprofile.net/proofs/artist/48f62355-60b7-4e70-9668-12b6afa83719.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 0x107797835353aa387858b165e67fbd8f31d6369be11cfa6c8fc221a3f78328d1. 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/JPD842400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8fabf086ce3a804302a2194a4cb498de7b6b0f05e9fae28e7603ee51a0291. 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/JPD842400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f4c3b08b798cbf3de8c69fb5690ac450dc5660b1562f08ed69f679d199e127. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPD842400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93abfeecd23e4604bf5d4499e167fba626d30b3276e24e7e2d5f2350e13b0b83. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPD842500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a2a566bb63e97bc5e8737f689a69cf1176919e2e6a51c71eb38a9ab08cb70. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPD842500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107797835353aa387858b165e67fbd8f31d6369be11cfa6c8fc221a3f78328d1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPD842400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8fabf086ce3a804302a2194a4cb498de7b6b0f05e9fae28e7603ee51a0291. 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/JPD842400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb5cf5c77c96f321f9c18057d83f9696ed32348278f2208e86df62c85b64c20. 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/JPD842400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a2a566bb63e97bc5e8737f689a69cf1176919e2e6a51c71eb38a9ab08cb70. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD842500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb31bf89327883e2f50b6b033a52d75bbce63d44a1ad9465b8fd32fe594589c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/JPD842500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1522f94ba1716a228b890a6a92a3a75acbcd62bd2c76fcc33ffef372799e1214. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPD842400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46eac5b6fc35b56ac9da4097fa1cca74ce5c474ac5b7f9d03fb36649f8fa5e2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPD842500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e3337350830addcfe07e01423dc5ac67e5f6df53edf866c7ebaea85ea74a25. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/JPD842500006.