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 0x4f23583e55c26cc563cf955912f5145e2d17c6202c59244a2e32d91714992cc2. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/841f5694-e60f-477f-a871-082f481b3625.json and https://artists.proofprofile.net/proofs/artist/841f5694-e60f-477f-a871-082f481b3625.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 0xeb803fa1c7633aabf40a0879251acf785e081622be24f4ff7f49df42d0927173. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM2PV1760079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe288485d82fc8034dc7967a1a81f7313400684e2a9077534718f884cbf56e43d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QM2PV1760080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392305b735d4611041681e4efed5f27eb2bd6ce6db05cc34b5c544fd3a71800. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:13Z), 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/QM2PV1780996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dddfe23071a9bfc21eacb5cddff6e82ea4bb56ae421bd3f3c34c397849603a. 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/QZHNB1975838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c491ad3edb86d1708db285a11489a8b2182f76c1abf83963dbc20ac6aed2e. 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/QZHNB1975586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd726a1b0d9ac66669aa866f4bd2be0668d87ec8912b9a41b428bd3638105868d. 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/QZDA52146208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c464cb72fd6a35d8281873bb37cbf6900bb459532b76b1605223228976045c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZDA52142917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6710dff05171dd3244825dabd561af6d1004091e4fb4152962a76a692f6202. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDA52143913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbd77a7b2e7150a1a37235d1c07fd58ed269adf240c45801b2e12d2ff41db3. 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/QZDA52143916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66b53dfaf3bab3e99d6be2ce7c26822f2c0917d94c7fef0ceb3c281128b2521. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZDA52143918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6030ff0b1cf8f8def3fb52c43ed3e0fe761ef33495a9bb94a7e00e1c35777cbb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMEQ2115740.