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 0xb42022ee3a2ff0d3406707b0b54fb55234198cc6747c663aa29ac196acc55075. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3189b07-a3aa-43fb-b832-d992c318ef34.json and https://artists.proofprofile.net/proofs/artist/c3189b07-a3aa-43fb-b832-d992c318ef34.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 0x54f79234c635b619a486c956a21a4197ad4e5d0ab2e719b494ae7acd9fd862b9. 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/SE6QE2313282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225ecefdff410aa99e146b96e2b1997c503c521e6a47b8ac5b0d33636894b8a7. 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/SE6XY2341036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df6ce1e4f5dc5007f588d1f85315465e0306e7813fb818f3f111bb47761e72f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6TI2370651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134abcb1261103db33f15dd5df4b72c65e479043ca489d66fb09f0457f601b34. 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/SE6A92374661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1e8a612c31b4b94e1555c93f6a525021cfe67bf3eee6c5d0098de3d88ed69. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE5752484300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e81159da228de3ee981b33cf636930f6e0737e261a3d46ab65f146b7c5b4dfb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE6I32414465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22130789f3563587bd66a7588f4c645b0670293f5e99c78589b63c695329b7c. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/SE6I32470253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee365b7a398893c4e6c59f912fe2004c1d5244c8b9df43c17d82b1741b74f05. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6SA2437323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54548899ed4e12312f55b4ddba31488a892622e537cb34c7a131f55f3d990927. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:22Z), 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/SE5BU2559423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ad91b7c1b24e7581c19215e6cbae3382f760b6c96883114ff997b175c4692. 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/QMFMF2432581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ad91b7c1b24e7581c19215e6cbae3382f760b6c96883114ff997b175c4692. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMF2432581.