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 0xce225156c1f76243b36e65a0faf8113abaf31dc59962ebb9cd5b69e3d97be567. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a99ae9fa-78a5-49b5-bfb1-80aa2a621ba0.json and https://artists.proofprofile.net/proofs/artist/a99ae9fa-78a5-49b5-bfb1-80aa2a621ba0.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 0x66edca3136e825e961613c5686be40cffbb5955575df5b4580dcf5796ee742da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE66N2333215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea03fbce39ff28d185de760f4ff19dc3fb504810d785860a4e2c91b63f82ecb. 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/SE62M2346268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b030c600de319b32b1dc3ff0485601fad2d80f8340a4f982c3ecc74e900723. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:20:19Z), 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/SE66N2369468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17638bff05b784bbcc2e8680979f8d2fd77904afc1146d4c43ea29c3b3dbc38. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:06Z), 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/GX53U2350946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e79aebd72123503b1196c21819536fe8e652ce4dc9533868f4f6afb8e0e524. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE5BU2459327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bc8380add82ce63e3d892e691a80a47db68a5e01c8b107f068d4c5bb29843b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/SE6HN2459216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d99590cc12371bac6d4161d94fc0f391c0ae76e1de45c5afa6bc5c2d60d99. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GX53U2353482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc344fd8194360825aca6e79342477b124eb8d73b966c44c15a66aa2befffb4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6I32472063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f4f629c80417fe68fc9ab30a02a3959688c269aa225239bde869e464aefca. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GXF9Q2539369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42700cf8ef285a2cece98097f9adc6d7d887bcaf0aecfacbaefed1e084e421cc. 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/GXF9Q2422869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055e5e446b7b56744dcf9cd5e97388d1e7f3b902431dae0b36c2c41932352a78. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GXH2J2587180.