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 0xf2f334c77935b03755cdbe57966b8ebb2ead28a9d7b2a047c523906e672d1436. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/421f0ea6-08f8-4d7b-8399-0f7684265541.json and https://artists.proofprofile.net/proofs/artist/421f0ea6-08f8-4d7b-8399-0f7684265541.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 0xcda872fdef6e76b8ab97aa0cc38ad73e01a590154bef43c0b69dfad9d1835794. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:28Z), 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/USLD91748060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b57536d5b616e5a6db0a29e82ceb9b03ac10477b91e8b590fadf7ba50eb8b4. 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/USLD91748117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03335c9c9f98637001cabf66b623fdce20e6d13de0e8eabccfee3e5472efc040. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/USLD91748388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5958f45fd7758c909b8913a5b9b90708732e854eb3d143611b73c69bccea1858. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91748097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5a279435182af9a2b7314ef6923c4d4ea18d99597c1041ed7d010e62153fd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USLD91742966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d1731f7a8939edbc166f41d463d9586957c39048a4f992a53d8e8da7f2f11d. 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/USLD91743734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67acaf2c4786ab07838bb8c339ad5eda1b8823dbe6e0eeecb574fb369e68b483. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USLD91751507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188244388de6f267a110eb5ea5e2682bac2fd2ba8ec343264b634a01045a9e33. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLD91769961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02017667828e05fd2d714302e0111a60197bebff93d079afbf61611bd5574c6. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USLD91780439.