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 0x6d7a85411af743c3d1727fa29a27805f4aa56e3418b925d00e2c6c2fcf440d34. 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/e140ce33-02a5-45fe-840f-05d358d12dcb.json and https://artists.proofprofile.net/proofs/artist/e140ce33-02a5-45fe-840f-05d358d12dcb.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 0xea46e86cff29318e5f0958c2008c41e9894bde8789b0fa2ede7850b5fd8133dc. 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/QZWV32359375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa255e547e29dba1c523c2b28c7a32acbca65ebb1811a83f1af183131d55722a9. 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/QMFME2326863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f1410fbf2eda02fef5fb34a86c40f49a6f5539224b572fbaa392d1e27bcff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2388672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e766c920a226d9cc2c9c5b357504d9a9213ad69be96d37b987d5dfc94182ba. 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/QZMZ92389671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0865bb1e625b0579ce577d3bf33a0130cdc34c554d7d254b45a0402f8735fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62230205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a118a5dec688ede64e985b9e775707536ee0c79fc808c8049596f9cf305be. 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/GBKPL2283999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731726b4253df44bbf2df8e85af84868c90cc03c8f4918e6554a12fb7c68af09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA72135126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32229c1406005f6c057c4277d332af94f2ed14c0807902b3f051d4c6fef51c3c. 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/QMDA62163315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132f5b17902a6425c97e36ed69cd3c361b4ae642a8078c3eff38fba934a92c1. 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/QMFME2187001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0a29ac00ea9829b2ca6e543f8ee153a3a5f6a5ed0080d501bf7e902094f984. 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/QZTB72287333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4eefba4f3008167646f4394e934b3cbc9102783342e7aa03ba6af805229f81. 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/QM6N22183269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd55ec570ca766848d0f7718a99bc1a8375aace9fc7556530256ea953a726ef. 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/QZGLM2577811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa691f7c65ba90b1462871250ddeb40ff3345c94e258e47ef3ac309744e059db5. 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/TCAJI2579456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefe4f8ad2f1255067c8f3316bfebca1afe9dc4eae544c802770393b87bb8103. 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/QZNJX2383762.