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 0xb3a700577924ad831d9a398be03710ab0900bb37467e2bc749adedb99f41a761. 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/a56e4404-1aa9-45e8-96cf-6da48f1124ba.json and https://artists.proofprofile.net/proofs/artist/a56e4404-1aa9-45e8-96cf-6da48f1124ba.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 0x0ee3260aa5347071efa43d2c876944c72743ac2b163a51420067a30fc2879407. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL1AP2022216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60911c788bb226eaacc7c2d3927045927d262f37cd5badc75cde5fe08464a5. 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/NL1AP2081510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1298cf43ee7b452a4ede7415e9b19a83374773a0371aabaf308049305a44b20. 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/NL4NL2137995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ebd39ba372a3d3c3287fa4508faa1d6ade54c2c7672f18aa2169b919b748c. 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/QZES82212878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2de56259644b1eae79072d56ad69b25cbf3411dc1b429b91cbd176cd7058f. 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/DEVY82000774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14190e35d46fd068cc37af22c773b84623c593a452b23735be5273a67b257989. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:40Z), 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/QZFYZ2355372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75383a63d9bbb302125e06c1c27d5de86d487f6a086d038446598e938bc0c4a6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFYZ2355374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8040e1c32cf681d5ff46d2d62536d092e70ca4da251ca8b627dda86e2a643. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:16:47Z), 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/QZFYZ2355376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4a9d4696b79e26ad13b00114c32cb9846e0619dc3bd37d165e3ec42ae92a5a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:38Z), 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/QZFYZ2355377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8093ddd21c6d6e67e251aa79152a03b2a8462b1faa3afc2b1a6ef302fe045d75. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYZ2355378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66d0440e83fd9922c0d56d8abe52405cd608255dd3e30c310228c7ed071a1d5. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZFYZ2355379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec9e540050130afa34f8c50c3c3d1ec3755b108db5c0d4a30169d77b327075d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYZ2355381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747680af9b1202d5680219d67ba06dbfded88e2f050ad6f7166a6f9224cff6f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWU2329630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8fda76e24cc6eda3838b1e518c68395c6270660fffb802496f5a4a33f6dc7f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:40Z), 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/QZNWU2329631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd24cfdecc164e3fe355f58471f555d09b7e7698c1b0c2babbb81421dd54ce. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2329632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816c1d6002594f485f058c021eddeabf6f696381728ace4da8458c4113dad50. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:19Z), 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/QZNWU2329633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115e805c7c91660fa1b8b03157bd307918f71a6c0c6f267276e8869f7f203a5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWU2329635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b425bf6062a383b1b84e5eeca2b7c9e4f75099524690c63bc3a6e4ae53a6248. 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/QZNWU2329636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe002399fea6dafd7899c01bf762a1d51d5bce7b23938de6041d1d59c8a1bb4. 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/QZTB22324148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f522d082fc80932eb264b580b26e79f00b9a7637b98f01302527848bc03fe29. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB82352324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac69aa6c08368c27ca2fffd5de2b7c83ec7b94711595855ddef4c159cd3fae8. 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/QZWFR2326695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1716c434c59532242ca630b8c9e725c6b2feb2287a014e2ee46dd5e7a320fa20. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA82481269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda906f505e2e9472e860634c1455618fd2eaefddf5ab234009523eb48a46e405. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6Q2462595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf3b8c25f96b772a80c07ae739a02099575cbad01a48d996c3d86df8f69a744. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTB72496916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabacafdcda78f3212a5d2b6be29c0bfba4fea10775bffb672f3216884417c6e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6L2534525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ee6c88a14dc85ae4c03422857b5db05be069c336c25e29877228a48119e7a8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ772512196.