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 0xfce16714230c1a9efc114ed51ce4af5796f1cacab42b2066f7b682d4ab85bd67. 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/0f99e0ad-60b1-4705-8cc4-fd369f3e9e10.json and https://artists.proofprofile.net/proofs/artist/0f99e0ad-60b1-4705-8cc4-fd369f3e9e10.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 0xa07bb28547e05db163fbe60df74eb7e3edf0a4e34f698c133f735cbb4adc7c8e. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZDA81901823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39918127622a3d5c37be6a17caebb1bb1d354385cd8af472bc8cc104557a6aa9. 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/QZDA81901825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2a633ee93526b6c5167c2e48dc11d65aac3c1cfc27b93816ed1236324cb4a6. 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/QZDA81901826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a0514da642e16c95c9faea2550f1aa2febe444001e7ecccba593bd4384629. 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/QZDA81901827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b68cec6263766d4ca61bb584855d17fc614772c2690cb86ceb9e333b7091e36. 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/QZDA81983571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c237d5f9660255fc41230ddcb3476d62251d3a91a282bd8fdf8a00f482a12a. 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/QZDA81983572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb20724724bd9945db72e572d77e01ac2f3cf9400b9a2aef10f78af91c7bde5. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZDA81983574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd55df9f904c4d9ede39472f5ed840d496f07ae9830a4bf10ceda0ae79e2e2. 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/QZFYY2093983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a6e9a9cd4ed7a6862c97a09b1b5df977402ddab0e4345601af5ac992740868. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:57Z), 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/QZFYY2093984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf745453ef375a9536648831aee75cc7b9fa194711b00a203db215b11d97273. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA82039492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8bb39b098de5bb839a86d9e8a9f48569934357a0b5c16a1267a1b0977739a1. 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/QZK6H2282350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d20c11ab07eec354c2a4ca8877f237268ff26d6c756c84ddfd6db26fc9655c3. 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/QZTAT2384534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be9b820c4d87c56485c902c46c843bccf6bfef97253cea1d8f9e0ea4c5d512. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:24:15Z), 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/QZTBA2311666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c1f3b4f7de9e9920b9d66cf5612f9fecbd81ad052fb3c37d2c1e5acacb6e51. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBA2311672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ab5b391196f1aa8e6f740b4b7760bc66418cc8daefc628b852e2cc66d1efc. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTBA2311673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654985f1fc036178327577103f8fe357848c5275ea72e4be209b5e92b78793c6. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZTBA2311676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eebf0b66ffc404d8ad3be946681c79fbaca804a5889726b265dbc922981915f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBC2533446.