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 0x4fe13ac7e44c697f2fa2d8fdfa7f9707f52e4789410b510b2b89e3e94dc9a0e0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c0c89d1-fbf8-4fea-8b7f-d573de6079e3.json and https://artists.proofprofile.net/proofs/artist/9c0c89d1-fbf8-4fea-8b7f-d573de6079e3.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 0x12098a3d5f15ced07092fb47d17ae600c94faf27147b097af7ce330c7fb3d361. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN82530876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b63f1298068a0ad3702816e9d53c037fafc44abff2e5ee4a7419f612254fe. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHN82575861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c71863d57a362f6b6b42ef2ebb97122948380058c1feae2d94b23b25f1bc13. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN82575862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e57fc776e756c0f77d17e8e427d6aab8c6a6b5c86708d9adf6749eaba0fb129. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:06Z), 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/QZHN82575864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64d1074f8ddc136758b88ba1ec79fb4958cd56d7c6b054dd36d99be1434b441. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:30Z), 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/QZHN82575865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61a97a7efb48e459d5af9a053ba901949b09b9485ae915a71242f0eae20042c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHN72584065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe397c113771a4feb3320ed4fb61b2e70e27ac78e14993b2c90ccd45e17f5d4d. 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/QZHN82501687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c72e51d1b47b783b48b155de324dd1bad40c2d1e6922ada5687c5ffadbfba78. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHN82532424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214d6615f61ec45011989f8507cf13cce4c3df6e83aaea474a5e0400c34e2a85. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHN82507993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746da0bfce09f0201b4e139ebda703ffd3b32d199c0e5e697e7913c4744b70aa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:45Z), 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/QZHN82532426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f4301d8a5c94566ba886abd70d139257759dd3538921d185bfb3c1e2458b97. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:23Z), 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/QZTAS2583529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010c7d8387e0b588e1480d6deba4839d340260750f946787676c48be4d927d91. 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/QZTAU2538151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6fdaa1e453f1fa2918d93f9e72e7c90852730cdda44d5a0170e91afdeb28fa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAW2534124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60e72b2651d093ce59b4deb4df17c0ca22645fcb6fa33c8ef26cc1d78d17f35. 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/QZTAY2568389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92955d48faf1ca8694bf4ffa3f1ec79c755c1d10022740d84e4907ad05c433b. 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/QZTB72521019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d126b97f0462d54db3f513e89e47b31bed7bd951ec1ce9fe44167ce0db78f8. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTB72597228.