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 0x410ea7ac34724caf2b4b1ccdc01bafe552db76184b66d936c2eed1bbb9b0f9c4. 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/76b79654-027f-479a-a38c-6e63e8cba7d2.json and https://artists.proofprofile.net/proofs/artist/76b79654-027f-479a-a38c-6e63e8cba7d2.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 0x821a2d0a00e2fabc28db55f3a3e48d717f2f31939dbf7bf3494d78765e5b16ae. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKXN22521022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c8806d5b0f268ffbaf60144ef99128bf774aeff42c86cc9f0fb10fe12e5827. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/UKXN22521023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96b3222b2b872c3f5f1f3f81d22aa723fad18b5b2318d723d5c90dfea525a57. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/UKXN22521024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f45769909691c4a458d6321b3c0c91098d1815cca0873a1a3569fed32564308. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKXN22521025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a35b0a6ace191f95308dd5f292ec58adb59f25f2ecdd4de65dd25c39725e94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22521026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3c3eb71478f68e0a474fcd75aca8c7acafa8d2dd525071d7dfdbcdae151e66. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:24Z), 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/UKXN22521027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44704dba4cc86f24b261289bcd498f5f59574158eadba7c4ab336c60985f58e4. 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/UKXN22521028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de6476ec21a7ead34e6a28eb9456b00eaf99e179f0056ab92a2aeb59156d955. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:55Z), 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/UKXN22521029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b1a431c3e16b30ae3d8ef0988288ef6770dea2ed32578e6406ed4188fc7d21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22521030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b73d35e401849f01d296c991f7d5b30369ecfe35686eb7a1da47f75b18726c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22521031.