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 0x924c2a6e000880e581378582cd011f46b123c280c9ad5a3afbdd9d1d36ffad84. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bd7748f-5948-4efe-9e22-64fdc03e4a7e.json and https://artists.proofprofile.net/proofs/artist/2bd7748f-5948-4efe-9e22-64fdc03e4a7e.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 0x60c866d4f73ae2a958b004d7591839d8b1ec12b50ec68d107c6b0a92ec52a6ec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:27:42Z), 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/GX89G2272207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf75c99bd0e340dfc252fce8b9beeb1e201f48ded58c9113e8cf721da3d3f8eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX89G2272213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115fbef2fbab6a4f8cc6bdf1b9be59fc04064290df8224e27b17279acb44dcfc. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:31Z), 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/GX89G2272216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864707ab9463211148ae866338c7c0f6d4b4539795bd550102c1ba9cb78f1fb8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:25Z), 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/GX38U2356879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b290442d1889701f2aa50647bb7806de86eb7302fdd3404121913c5928a70. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX8LE2343018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fcc4913a53d3859b5beff5da4f443c6c7cf14a1073dc9eb76329cf4e5888e5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX8LE2376287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098f8f3026be4518d329738268711b551d49f4b54629b52102ef0e1264dc5696. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX89G2277191.