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 0x98c93363f23f729c2ee36f0b8bd877c1022fdf61c67eb8417d588c59da0229e7. 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/da737299-e3e8-42fa-8a54-f8470d39217d.json and https://artists.proofprofile.net/proofs/artist/da737299-e3e8-42fa-8a54-f8470d39217d.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 0x22dbab01ff4509a1a68fd9b80583dc4e076c65c0846e878d434f30e8469c033e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZES91834927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94be5f82e106821f021ebb876b3ecd5bb20fa1e525271d7a2c6029f53a4a44e. 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/QZHNA2020131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40900d85eda4c789711197a29df1be9f733d34a55f59a5204395e4f7e30ebdcc. 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/QZK6N2067376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14467e16fdb36a333db5182a7b3d45b41d667ba7c319213a6e2f6049133be8b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2015772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48aacd63a66394e7426f82fc4233fbf3a05672ba6d2bd16db73b97b358cf920. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZK6F2147206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03599207e2b5e1a84cd77641918dcb77dc937e2a7eeb6d134da258572a715f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAT2113153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c6d64dc8bc88aa511ba726fd33e2ab62be5a97c340baea3e0a241478ad3af. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAT2113154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83890fd6ad256228f0c7a1afcf84a5fa1db4268e7539c34011e8d09110749c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJW2519814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08881691ef72694376c5086b492463285202493ac587fd8a6b2d111d55ce2b9f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNJV2598570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1d6afc24050e8d8d11955210599e4be698745a23f2766b501742830ef9ee46. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:08Z), 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/QZNJY2538738.