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 0x89906058dacf13edbddd77426831bf0cef10692d089c7cd8206921f538b2eefa. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/479934b7-268a-4ffd-8aba-ace86b4e50bc.json and https://artists.proofprofile.net/proofs/artist/479934b7-268a-4ffd-8aba-ace86b4e50bc.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 0x3f9e8c89db2cd26dc0be3a68dc90aab2acda2d6b44e1a04586f2d89a82f12086. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA42243584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89c8c4c0a3cd91afbbe9fd56bb8a1b7996d3fa03993668e0dfe645e9bf2c51. 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/QZDA42243590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfe04c96e88415b86939f065e999c181e91bc21a0049350c2c9e439688d779b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZDA42246343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d32c22254297908d78902be5099fb9be1fe709bc6f7619e6ec952ecba0c66. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA42246345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9172e6ad49d90a1b20c5ea0443eecd01c90400011fa22350ac9635dcadd9f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZDA42246346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ba2a669b6ae003a951625f07aa3d9c5bc33d6ac3092e4a295819144b8caa56. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:31Z), 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/QZDA42246347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260c9b1140e9454def7b1d700a06d718cbf37005503edfa7c4e15cf1da0a4abd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA42246348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9517e71795407d8c504a1d8b63f1a115253056f78da8ccc0c394bfd891635ea. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZDA42246349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1f8fb42a2763dd984c98e7b1c4ec4d3849ff8eb966a9796ab47af5681877d4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:38Z), 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/QZDA42243603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadca26f9fd07a3797eea23fdf79f5978480a7f0ac4a3d9c69c9e001c99d227ad. 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/QZDA42243606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de6a7c4cdd033437bc3b7ca339a7bc61f4e2414bb9e692afbaa8bd0a01e1ce5. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZDA52283715.