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 0xf1d3efddbaf53e66d14796adce4135ba39e431be1bf44227215a154f5e410a60. 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/5985d24a-5ceb-48ba-abbe-a4b4e6dc8e6b.json and https://artists.proofprofile.net/proofs/artist/5985d24a-5ceb-48ba-abbe-a4b4e6dc8e6b.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 0xaff024a7a7215d27f0b8111b1d4e4fedcd078c7cb3b2738d3eb881e3366d1c31. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2089279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c07e044b12e75b7347cf0d8cae3a79ac130ae91de0b799f44493c16c0068b60. 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/US7VG1731386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3884d11135b81ca7655f865cce01a938c52f6f865a7b7f0492d2c6d5135af346. 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/QZ5AB1797584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38195a7a27a2e5800a3cc0e48f06e88f07ba6740ca4058c5253cfaf197f4ce6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1833457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a9dffbf8b20dfe8a35fbb23cef09ade2d2da3e3b1313f9a776c255f2e28036. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1833458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592fc26a945fec7663eabfdc214e5a15818d07180d2e969894bc5e07558b150e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ52088752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb919ebfb2436c3e4738bd156da1f676fc1f7aabf913f92aebe4f5da685296fc9. 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/QZNJV2048686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa8f0c10ae323fd3629f44a1a93edbdd5379bd20f8af7cdaa411a3aef267a6c. 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/QZHZ52097940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73449a80f91730dc9f6bc0ea299240e7e64997a96e11786f1aa4757719a59cad. 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/DGA052013351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424c2a82e76360e0746fc573d18317c4e47ba9f9f3a384f538baedc85324eb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1984112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183b342b3dae2a578ca17bc9088a687d1ef6199f39baf7e4405cdcb572bb5383. 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/MXF152201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780af02346a0f5c9b016058602b247de01072b212c9291a820eff26be8b121e. 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/QZGLM2100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4857f1f0d8ce6359a905da5470cde01113429655a70d6180276de4db0b355. 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/QZW9K2267248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4857f1f0d8ce6359a905da5470cde01113429655a70d6180276de4db0b355. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9K2267248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb780af02346a0f5c9b016058602b247de01072b212c9291a820eff26be8b121e. 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/QZGLM2100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c758d2ac3a3173142e5a67a904cd9148f407fada1167c5fe39c4a75ceeb4500. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG2287238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a6e55ec813d6cf33fd04eb4185bcc705ed94de8e2d18a832655106a1a38e24. 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/QZHZ61916665.