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 0xa3a760ff72574f201934ff347823ea94ee0b99f854b50684f474f7f9cbe1f343. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53ad1cb8-ce49-47a5-9113-5d06a70f6b9a.json and https://artists.proofprofile.net/proofs/artist/53ad1cb8-ce49-47a5-9113-5d06a70f6b9a.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 0x2a23af049ec6b86ba37bc64e6a4ac95fc2595ae1c44cc5f7353a7281120229ad. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:24Z), 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/QZHN92429325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4924c9fd0f2fb3c64c3c2269475cb26a5d022ff4f1409f98da480c02eec65e5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92429326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73db7fc1c0cc9acc90b63f1353c5a1403fec4aacf9d290c13bc98d02d5eb97d. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZHN92429327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c64d915df1d55fe90ddb6a4b2436cd06d5528826d537515349bb807c8210d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92429328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e60f3548f2905bb391c9d3ff1c3aee6e9d0c9874e317f3397a22321dc0deb2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:45:53Z), 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/QZHN92429329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21055b9c781eb703e16ca4b908f804f7ff7bc9cef88e20ec53864bdb341ee34e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92429330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa1e150fa43abab22f86cbf04f914c295fe2be0402121edadd03fb8e84cf465. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZHN92429331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7bf3577359ead534e6d6deb2698d772043034e2519c0b3d7382386b90bfd71. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:31:26Z), 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/QZHN92429332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093e9aeee885428143fc42990b2e23ba225ca9e69b9d001a641a1afff5c1447. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:19Z), 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/QZHN92429333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1005300fc48a0df45db0d381fc891705b0cc4c10bbfc6cd95e3f66e027429dba. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92429334.