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 0x43f734ccc3b5719f3c39504dcd19df24f6000d555957c62514c14be248c0be94. 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/f5fdb023-be60-4428-882a-be749926f127.json and https://artists.proofprofile.net/proofs/artist/f5fdb023-be60-4428-882a-be749926f127.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 0xe172a2e288c26ac78fbf2f598f971d07930ce605019d479d5fdd2d1841e463d8. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6Q2406812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3418cdfc5366e694f9d5304b2e8469e1b9dc9a40c98e152d7255cd874cfa1ae. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZHN32597088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c04dd659cf495ff726ea36b52ac95bbe66c134fd1e327941180825ca250fa8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6H2519652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1eb10273b1b03ed90b51234670603ac318c61a6adb50534c92535807a6f588. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:38:08Z), 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/QZMEQ2513800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe172a2e288c26ac78fbf2f598f971d07930ce605019d479d5fdd2d1841e463d8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:50Z), 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/QZK6Q2406812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a40e5cc903006e3f445fdec47bc49089db45c94030d2dbe623cfad47c691491. 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/QZK6N2573109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c04dd659cf495ff726ea36b52ac95bbe66c134fd1e327941180825ca250fa8. 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/QZK6H2519652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3418cdfc5366e694f9d5304b2e8469e1b9dc9a40c98e152d7255cd874cfa1ae. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:54Z), 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/QZHN32597088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d50cd6f292f664ba7fed248679d6e2d3b7642f5035b54d6bc69cc4c06b7133. 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/QZWFX2564702.