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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5271cbfd9d6b5422a791beaa1ed58dc0cbc4b97d3f9b1b8dd37125e881dec75. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5894dff-9ea4-4670-83db-38259b71c77e.json and https://artists.proofprofile.net/proofs/artist/d5894dff-9ea4-4670-83db-38259b71c77e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e1e3c6c303cd3e4cb5d4ccfb43f62c26844e0745300626bc8f02088f98ae3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPR561900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e1e3c6c303cd3e4cb5d4ccfb43f62c26844e0745300626bc8f02088f98ae3. 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/JPR561900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5d5c21a73bb706cceb64946c65d6630077a6f20fca5b3e5072c17d17a2660. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/JPR562000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5d5c21a73bb706cceb64946c65d6630077a6f20fca5b3e5072c17d17a2660. 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/JPR562000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dece379875a56dd1eda245d2e4572520246b9f4e349298ac1fde358c56d252. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPR562100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d91e705addd81583c855567cba21306950fa277015a681f7299c75fe6a45962. 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/JPR561900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627651ec8a8b8febf91d3e1ffed92f1cb8fbdef431e4729f0c38112f3dd58c76. 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/JPR562100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad70624ae04693a24433242e8233a27160f4915bab83a204355a96639e3b16. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPR562200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625808a267dd19f9b5d8e7ee016a51fc243969e8c0940492dea46d58be1ebfd6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/JPR562100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c8a92264ef6b9293bbe5a437308f5612b15930c7446dcaabcc6c19369e5fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPR562200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450247bdc7f839b61062eb26b6b17e74cafafce61da06be2e86f50393dccb10a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/JPR562200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a5609aeee3574425efab996bc7d8955b1553cdeaf07168a666cbaa74a4a0df. 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/JPR562200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f5f498508f6a5d13df21138cb1dfa34a2daff52e2f22616e99a0d8025b18f. 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/JPR562200357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd0124e68a75cb8e7e4556d7a6931ad065c294e6991568384931618609193f1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPR562200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a1866f58e1799a2af589ff993d27984eb70c5768d35af05b927c3a3d9298. 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/JPR562300581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a1866f58e1799a2af589ff993d27984eb70c5768d35af05b927c3a3d9298. 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/JPR562300581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a1866f58e1799a2af589ff993d27984eb70c5768d35af05b927c3a3d9298. 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/JPR562300581.