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 0x2a0c457aa504bda31dba3505656f188469f78309d7682cd725179bdeb3ec8709. 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/ab9539ee-3425-48c9-84cc-69e5cc2e4054.json and https://artists.proofprofile.net/proofs/artist/ab9539ee-3425-48c9-84cc-69e5cc2e4054.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 0x3ada54303dd687ec6424bbc7f3e77f42b922fc07374ab5c8508f085be6e3fbd6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN32074585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1eb1768875880ab592fe80f9cc9f7916e4105d567bd17d33fa536acac220f6. 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/QZNWR2035172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249ac84f6c37a4c8f07ab111451b218bc14407f15590b5c3c9e9c22e49818c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES62195553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069c939e0b74635bc2eccb063980ce926a6314d396bda6bf5af61d65ca96ec0f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZMEN2186572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e62e37aaf9d4d9694a2da08803d4d0698b83ca357dfc509019824c3935445b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWQ2184594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d81cec97bc8418b5d3c44673759bf445e06206df7f44375a20bdd0eb3262f65. 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/QZNWQ2187497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de6789bf9fab135757fe61c17db13132cc5a2abf830493f0aff56509351eac. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZRP42124998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a61a492406d5f0d41b6764f87d7fc64a060783cdea68beb2c53deb0b7efbb8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEN2273348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5567a0ec381be3830efbab09de5401e4bc86b58ca7b19df6f060fa51b3b60. 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/QZPLS2299178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12760fb5c79c11f28e538c7191fdb5c8e75ba1f2ec0e09f1a6ab98378b2f3ea1. 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/QZTB22213293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06369f5e779f42675e91540a75ab86985c5b5a190354d2ddd5098ac6fdf20abc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:12Z), 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/QZFZ22311060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4af4798658efacb716958c6a4643baec2cad9f42b0dfaad70db73e1a468b762. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES52301927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fe3ad363bc0edac8bc8503322018a9600e489fab9155fe42fc63e340290fb2. 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/QZHN52341952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de6789bf9fab135757fe61c17db13132cc5a2abf830493f0aff56509351eac. 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/QZRP42124998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12760fb5c79c11f28e538c7191fdb5c8e75ba1f2ec0e09f1a6ab98378b2f3ea1. 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/QZTB22213293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc957971342a2ecc045a84fae42a7ceb321bc76d0377eaac36281126727e29823. 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/QZNWV2363496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2aa31aae2f3eb9069288b258616f702002df5728555a7053aca7b8fa3a7b0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPLS2311218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc4c7710352da62fd24b5f07d1ca901de89370ddd4d43d2f268112022246d5c. 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/QZTB22345486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88669cacde7a6d07ac7558efdd9c1a1a8dbc7154d4f0683379b36c610761abf1. 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/QZFZ22427887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b067624574d1edbe01b4b53351689060ed0e31df5567d38c454553f814d8321. 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/QZMEM2403421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b444a0c61ae0fd8b3c8b0216f195d0726501b936436ac644a302775c2b6b6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZNWZ2463525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df4cd3458cfea1cbe374798a6f032d5ac171e450e2a20bc8478eb9707ae056. 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/QZZ7K2440391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba5025580c824637bf8a49363e6668aaae2f8e6c88e6eaf26618c228a1ab27. 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/QZTAU2575400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5fefc452c0bd25b2d2259719f9b2fa935325166b1f0c3434aaa0bea4b7b97. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:19Z), 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/QZWFM2575345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e314e2edb6a0803ffc1914556109a89dc13d3183e17af50e364cf65cc151486. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7V2538759.