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 0x938a936bbb03b8a5537f4f794943e70b39ab0a340c51f252c2117aadddc7143e. 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/9193ce3d-99b0-452c-a08a-3c17ec48067f.json and https://artists.proofprofile.net/proofs/artist/9193ce3d-99b0-452c-a08a-3c17ec48067f.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 0x3d83fbd999601fa52032ebea69f20fb99c8a828e3201ebb0de5735ce6a60ff20. 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/QM4DW1898946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7d7fcc263961d7fd498d1c0131ade66a9d97fdbd5c1aaa12c28f96a05a569e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:13Z), 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/QM24S1838257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27221d447631b535501d8b6731b8ecd8fc53adb18e1b1d7c1547d0ccf1d90de9. 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/QZFYW1999693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e509c47b3478c7df16db2aec4c8790b3f2ed3ce73700970ada14ac677a8f75. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:17Z), 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/QM24S1925245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac51d670a83f4284244d03bfdc51d0777b83ac29363ba05efc765633d28d880. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM24S1927117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5324bcdc1e7b3f5ebcd53aa6f4898f2232ac7c2c4c6fffc8563bab1b10a07. 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/QM42K2081949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb4a3a557af5e0a5cc23cadbbda7ecc24ff8094aa25c2f2ca1718e465981d9. 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/QZDA62081199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7664ef200925373337e6661ad1132c8c9bb01aecfb3574c5c4de265f49dc55. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN82130655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462c92577a0620b7d30654749fc3e029a4d6b9c86792d540f98cf0525d6ef2a. 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/QMR6U2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8956dc5370a593191a42e700572207208e37915b01ce393136327907fc0812. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:55Z), 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/QMR6U2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a434671e5b09bbde949162afe1b7f608523165e13996e780c55a1575510c17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMR6U2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a434671e5b09bbde949162afe1b7f608523165e13996e780c55a1575510c17. 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/QMR6U2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462c92577a0620b7d30654749fc3e029a4d6b9c86792d540f98cf0525d6ef2a. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:22Z), 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/QMR6U2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b968a5181b699ddd9c5fdc7336897f8b90d14b269873bc6df54ffd38c2a6e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMR6U2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1773aaa1bcc96eab4a2f26a09901044c8ecb1b381352eee698dfb16d27698a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMR6U2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43b591c447e553b7a1b5e0c52e696a2c9687ff9268c8c1512627e078b3aefa7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2424289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a52da7db24fdac3db984b597821fe629fe4d5b2d1597761a3ac27577182dff9. 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/QMR6U2500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6fef1292bdc24054a9ffefd2124bb9ac65b8bd73ef3e824af32640633bf31a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K1901082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9218f5a6e92e0f4c9ba3aae4ebee55ae001a09e66905f7a06713a753a25157. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LE2503698.