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 0xe37340db05d27a10aa928bfa88f8b9598d1e932b68f94402854435af3ccb95d7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0527225e-dcab-42ed-a16b-3d10eba345c1.json and https://artists.proofprofile.net/proofs/artist/0527225e-dcab-42ed-a16b-3d10eba345c1.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 0x21632c96f76a2869d861feb362c4c03f3cb9d9f7e26124de72d9b423bd0a62cd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTB72353320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bbb5bc8e4351b84f38bf10e93cef0141f9fb0db17d410249947afa65c09c28. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB52362981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f0d1ede90f08c22f6e59d5cb808f0ec4faac24b0e297bc710fc6d856c5fd64. 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/QZTB52362982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2137616ce2e3eeabbf1cee91d78c2350233fc208b1f83d801b8819ae4ebc8. 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/QZTB52362983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22368710902b1b7bee11b81ccbe345e783ae0bac1dd23aca446e59579e033a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB52362984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873d9fef7941257f1fbf884f0d0ab44eeb433d8a18fffe11ba0c69dde058950b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBB2355690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368ec0169291bd19abf3f0accbbd96b3adb7f36067ef2c34f0944db3d4131e10. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ32478871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2353b68991c419201c8361c640432cf3045a06ed0b21901df72c1ebb9e563f8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:47Z), 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/QZES62492520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe931a564a5218197d6279dd697f5514eaf740759b2b140a48bd1b1007ea215e1. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZES82437412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7927433bcab8cae3de761059cf543e6839bfc49665fbc455ddb82e191c979b45. 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/QZES82437413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de0cd7c35704ba8ee1015ea0d180222c9ff1d4001b4ff2a962ecd912b272afa. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHN92413865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4715fadc8f5a29efee26d47d4ee75003d7441bb834ab61408b99f1f85a0dbe. 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/QZTAT2427257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658ea775656ac5801a8175cec9d9844253c9219f20489ce8be61c6360b02dd0a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTAY2419691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54c29c05129ff04f69eabca361a7eff3570320e062f1f481220c742f420b23. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ792410276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd202407855b2259ff3726ee81963ee9eedfad0dd6359fce2a66b63c4fe5cffa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7S2410563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d52307f7a20082088f13b924c9a94e7f207114760c30735658ebb89d3023c4f. 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/QT3F32417638.