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 0xfaf45f553d9112613375033e83056627f587f6d51dc74075ddf19b15e4f37b7e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/825e519f-54c8-4f58-ad46-ffab10b60421.json and https://artists.proofprofile.net/proofs/artist/825e519f-54c8-4f58-ad46-ffab10b60421.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 0x045b08d5007030d15581710fab77f25b84920c982ac9d87c63c463a38eddb745. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM91240527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554010dc578fd4ec637842e3c01e5faf7996aa093d8f0c88c8b4be74a2258338. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USHM91240522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16538f219cf3e892b626b5b4db5e3962562dba3d8a439e0238d0940430af5fb3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F82580320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a658a385ce9b6c7c49f67a0d6828439b913c806195899ab9e6c19740cebb29e. 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/QT3F82580314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b3ce7cac6793ba211733a0922a58ca99c29f1ee3195a5ccca47530695291b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:36:46Z), 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/QT3F92520231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8540d4067ff448366e346ab78a0d642d62cc64b5d97d03da89d91ea56ba23ce1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F82596153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdd4bcd3c18fed4b44b5858fad07c01357be76b970cf4ec98916c77c2db1fd9. 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/QT3F92500461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1edcdf1729e4071ae7c82a853618c6fdd0ead73a4051387cd6305c2e072fce7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F92580009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f076fa68e118a796e30ffa4e0de6e75606f04d7769f6c6a5f45be64664fcfb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F92580030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c52cb9b6d51d718ba97947e7607990df7dc95ad085deb8086a5c029be2ac3. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT3F92582460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f042c473664a1b83a2968fbac0ca2a42459632ecb086df740a8cf6ac0ad9b4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F92580034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893c35132d1a81ca4f07c5d27fa83a05cec6f5d880a89286fe73983dcdce499c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F92580027.