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 0xe3bf89b4ba9896842dbaddcc97bc4c3aa43a20987d4c67083e7b836b8228ea0d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9272cdb6-c303-494c-9f2c-9d2eabc6232f.json and https://artists.proofprofile.net/proofs/artist/9272cdb6-c303-494c-9f2c-9d2eabc6232f.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 0x3bcce092ffd7fe8e6f82c4a65afd446f5e8418326f05503f12ecf9dea99f06d1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAJC2405817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b00d436109303a583ca15653f5b7c123e703a70cfdde54bb8c0f0deffb148. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:36Z), 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/TCAJC2405826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a0dbe32a06bfe76e8b61adb648717820934249de649256f796411a9d301578. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2405830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14af5c0566bcb570228c59aa299d2897555c0f93d81605fc6f15d2ebf7e0d041. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAJD2405837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412b66bb60aa98083edcc967e4ec220e1ee96879f1e4d5b8f46e6e81cd0bdab6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAJC2405839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9fd14924a22aff89aaa9575db30d77524f133695191a2b5fa4d5c698b14ebd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2405842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e116fee4537de3bb2c2526837819fd43c391c9c0817500741db3e9124acf79. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:53:37Z), 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/TCAJC2405845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5822a4cd65a33295bb98eeb0f2c0d7f336bee25d3686fe659f914f54fef201. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:28:09Z), 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/TCAJC2405852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a9c164de558be8cec2ea0d86c516141f178289a8a3545316b41dcd199ebd44. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAJC2405857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b786dd3039a57613a96105850d5b5c705ccdcbe34a1cfd64a6f9f12ce478b98. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJD2405859.