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 0x709badfdfff888fd9b43f810b2eba7400d80fd8a58977b55188b18d590f42ca6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/245c6808-acf5-44da-8e58-a83747e5687c.json and https://artists.proofprofile.net/proofs/artist/245c6808-acf5-44da-8e58-a83747e5687c.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 0x328ac46aee6bec4f739c9c897566bb46c81ff76839ccf33970cdd9360d7b9832. 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/CAHQJ2462453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc87150be28d9bd822448429314265efc5505482ed0fdfa259856fb2eeb98565. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:38Z), 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/CAHQJ2462430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c62a8886c0236694923290f3210ddc60b619cf768d1aa1db4b688fe1d1dc8c. 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/CAHQJ2462488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184d39ec83c4b897418d26718bf3a8f008f0c0b7013490e5ce845c34c24d9424. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:27Z), 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/CAHQJ2467036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6297a35be0feb818099189b07b9bd368bd05bda71436ce69669addaf03a54b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:46Z), 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/CAHQJ2467038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b8ae77d2f713cfe8f63a38048cc9f91a7a531359cd2beebf9ce2fad88f7b9d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAHQJ2403245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f50e22711dd29d0c8ed0525a4d3e946b1ed2cfc4d2bb85b78f1add33a620d5d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAHQJ2403249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e1a264181fa10f5918ba01fecb2ee1476025b2800e146b17f68a647da98afa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAENV2448819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb0e2cad5c8869484066ef8c0df3e278e251d397939302eb8fa4c4fd5f72457. 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/CAENV2448823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ade4f0415b27341f0299015963c310bab92b52a931fb964ac068777d77dfe. 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/CAGOO2498710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a10039f48c104c981292be10eed685c99a2ae1aa93cd21a4c7b32a0e3340ae3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAGOO2498713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025853b5e78eefa161ed8be60807bb1e40b544ab6543e0c21c60c0550dc7cea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CALVP2497136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0548703821c18b9a520b55f842efc7f936bbcf50de53bd0c5d2c3919580624a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAHQJ2546864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d030be00fa4a280ed2de83b95ff6cb43f5ab17c9884714bacd5ed17df4dab79. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/CAHQJ2546865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a3c694a5be67b7a08321c2979cfdf847c01297b7ee2909f952ab335f9bd479. 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/CAHQJ2546867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e8112e8d5613352c4f325dacc4e0b6e3d55190a3e66fde5482b41d8071b85d. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/CAHQJ2546866.