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 0x3d1d367e3d3599e402061d1985cce0065b184d849051aff88d4c308ca2ef6fbe. 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/5edbeb5d-d331-4759-835a-80d85ed37311.json and https://artists.proofprofile.net/proofs/artist/5edbeb5d-d331-4759-835a-80d85ed37311.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 0x0098a3bfa2416d53bbdae7f06e52775e69ced4e6fdd2bb409242eefe2faa0f2d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGH1172015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec512ae6623f062c70a6e9c6f9d15484dda0bd5ece36597a6007035b9eff648f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM91011789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384d961916b439371d44816e0dc11e16e9518e8056df823fbe9208861182e5a7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM91011790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791cb5ca7017359ea2dcdc85897fa0c79184f174ca2c6350bf4107639118597f. 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/USHM91011793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfa9b0b6011e24ac7360146af0155374953ad0426c9fae115041c1dc0df85b6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM91011795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5cba55d9d6686658c66d053b97ff1b0b3e35e4314957a9517fbdbac91db5f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ES5301040016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f9d0bcd84cf68de5730d5b59f046a4d6e0550a48a457e304eb86dd082f63fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5301040022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0e60470181331d8959f20331c16fffcb5b15dd160e502aee1b961cd67b569. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:09Z), 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/ES5301968434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa996470ca4b464ce3ac2d713ac6b3c0e7221c02e9386334b9e18c43be57788c9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5301968435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e686bfef17af4a02fdc08beaf5df9acf2910e79ba3e05f82e66239881502a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:07:12Z), 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/QM7282559038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2466c2b5302745e5c850fd4431ee472c07a67fd0b260f13986988758f4f391b. 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/QZES81821043.