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 0x9e703b0aa2596bac10d29dc1623704539706cac7688dfbcce6797d688e6fdde1. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e69084fc-fa43-4b0d-866f-66da904d7837.json and https://artists.proofprofile.net/proofs/artist/e69084fc-fa43-4b0d-866f-66da904d7837.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 0xd1f32ab8e728e82cbfbabdfcd9d98622a8b9c5f83e98b45c550b4ddfb2801060. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:35Z), 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/QZFZ22254757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29de907fdf0816ef395aa9f63e2dc4830010015422003db137e896e2c9bb9e. 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/QZES72333580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c866071460cfedf0a82dfb80ae194d3ba77095f6870d125d7b4d7b14941fc. 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/QT2VB2454523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a74dcda5ddd69696d114de8b3dcf408710a58aa15ef56a9aadac10bb76b9e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QT2VB2428406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944c5ae06df408d83ba0d7b094eb5deaf300eb11e869f171e7fed46b7681f91. 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/QT2VB2454524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1703bf0f90189605c2de4c10bcf253a4fac90ecd5831283b741168a70f5458f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QT2VB2454525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc036ac3daf7b8e1588bb2cce12966b121cfb74abc7299d53c210d5e3b9a3f421. 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/QT2VB2454526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45077c9229e345375259102ac97f9469bd48c65a7f3219ad6b4e910019cbd008. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QT2VB2454527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e32c165d14780a4f23e474996347edaac2a9f699a0c92064870bf07a2fb15d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QT2VB2454528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c7f311554f00f2cdba854252a8530a4450091c9ab3105f2143548714dc1f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QT2VB2454530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cdb66140aa0b6be3a19b27a99b2702ce63dc77c5995134b5a6c3d06140c1b3. 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/QT4K32589027.