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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e249960761bc0c2f32d081b41482b9dd5bac3a43a98f9691957ebde08188f9c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a57e6b6-d565-4316-a0bb-e5fdee9aa25d.json and https://artists.proofprofile.net/proofs/artist/7a57e6b6-d565-4316-a0bb-e5fdee9aa25d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa664cf8b0f0b0f444933660a6a95da861494c761f906f979b26ed1afdc9ca962. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:34Z), 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/QZHPJ1958696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bd1387a46b63281851bb498d37c44df403c16c0707e41edee206e79343df79. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:34:45Z), 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/QZHPJ1958704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb0a4e71d18f4d6003c8ede00d12e381f6ff2f8daf6d3965fa4c4ff0f0d78a6. 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/QZHPJ1958712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa111be721a4950c45876ad1b7b88cfa6afcc0cc0b14956f2215d8a7699a42999. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFP51916115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2924e7b0601b9b2e5882f40ffc3df83a7928eb5e139420f2658d884b449a39. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:37Z), 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/QZ93L2024343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a437a82db54630988a6dc6913843c0ff1228460b01dd625677a22720b0e049. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:53Z), 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/QZ93L2104845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7deb9f21ff9b96ad1d7b6974d5ff4a8b835413bce5541c44b6476c554435ff. 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/QZ93L2104846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce628eb9a7f43873e88062882895bb3c9eb544bdd47a9bc7efbbb978d047a53. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZ93L2105114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e07f3453954a33f4533de8f3580132f52b7d7e85bdc62194af92e64b48d4ea. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ93L2120234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a04dd1190d6535f9f3316bde33f6b6b31376defd2dab33af3991e0dc37c4027. 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/QZ93L2120237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874e28370f116ad01107786d0b940ac76f233011a20966125a86cd1d4a3a3525. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZK6J2319350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d980ef511a3ad74c60181a1b8469c0c8abb2a9b6a8bcc6cf38f4f5f3a9e817b. 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/QZNWV2393346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb972835f00342a1afe0239564b08310860fe755b6d59e1f97030f0bcc58ddbec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBA2359785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c38dddc1202818cad67a3bf9ba3f8a2ae55b987d274daefc5dd514bf7ad1c7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7S2404458.