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 0xb72ef9fc25e5793c39b164e01f8b395ce9d3fa40ed00bf50d6a94e80f72b77ea. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743834b7-97a4-4661-a703-158ed4d8dbec.json and https://artists.proofprofile.net/proofs/artist/743834b7-97a4-4661-a703-158ed4d8dbec.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 0x5a7f63975e43a254ac83083afaee979cadfb3cabf6de976c0edcb2c5aaa2e465. 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/TCAJN2516814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2add57e33957c9899bce66953b48e491a5979db8ecd8191deaf92d55b9f643e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJO2581862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02938f94c89e0553818470e5dd18bf97584bacb8d13c45ad43dbc8ffac805e0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJO2590571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ada493de71234c939e233d2a4be79974a7979cad1a1f0f4e6da64be6cd4e5b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAJO2590132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f909ff4b3dd8c845cba172d2ad8375e1b959f9127afc0ff2253e3d2e290290a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:38Z), 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/TCAJO2590258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9346f8b260488c6108b8f766f5eee499e31ad24d163a5894a783ecd0b84a1c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJO2554221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95aa860df29a6d5f9b6a62aa2b69e61965f1301e98cb33d7819d189ca47522f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:03Z), 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/TCAJP2590381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18157a37794a18d8cd9f61abeb62353f1a8ad04214a07d31cb8e2a4d9d0308b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJQ2513890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602f47415ee4bb23debb6306a3c54dda475923a27718877578ab2c2c07ad0a69. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJQ2521889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1037863a9e718eb51c7c4e6652e4af8ab6f78668778c01eb88d6add437bd5e. 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/TCAJT2526016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f280283b4d38a1454195719896c592bb877be362c21bb20aea5844718f2f12. 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/QT65Y2543479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888140fdad7ac56918650d94bb1140ac27601fe9be9d1404d0fc190065c9d15. 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/QT65Y2543491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54616ca7f3a98269334f3d5212a034cdbff0378074dcfed5b2de2380470256e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT65Y2543497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee809ba75653c2e7078069b1d77be800cd0c358dab2dc389737e175951d335f3. 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/QT65Y2543505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e8c5758cec07f6e279160b46c9a08f0617145d94dc20ffd923e31516f2b4a. 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/QT65Y2543516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513a774675e5356fc65af4461b14381551b5574ab3daaee1a80cc2b8f438a49d. 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/QT65Y2543529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808eb8255fc34216af750314cecd291630e142f1624099c5700d2ac5c8b08dd9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QT65Y2543558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ace0249c37490af202bf3b8222808ddff7d27055ff825645a07fe5c1751f67. 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/QT65Y2543573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fabf224e1fef523c42190e58798ea377ccb7d64c4a9d4f5bc53c35e90ee4df. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:09Z), 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/QT65Y2543752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e75e52b478fd228bca758cb658189d848781c37337a0446dd50385e8755a93. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT65Z2581591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea251a76f5f1dad03311a14d81b2035bd81bb35f10843323291b9ff2fd5c4e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:24Z), 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/QT65Z2581605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed30a8d520791af9396e8564042d1058d9eeac106b79cb6b2d04e30b0b49e85c. 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/QT65Z2581611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c70d305d308a0f0bc9a83a07323cedc0100340101dfb8dc15ba9ee7af22d8b9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT65Z2581618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52009f85e8e8c1dd1cd3c76e69aee975c0665e117b3ab815d59e1d063121fede. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:20Z), 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/QT65Z2581624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25708583e37f9a41d8b7133fc34651a6e4ad629d09922b08954bc953f96d2297. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT65Z2581630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de49b8531876cc08b46619f379c638525b17bf234411d42ec6418b062018049. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:04Z), 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/QT65Z2581634.