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 0x170656eaba9c012c97209e526528807573b12ed52443298895d2e4e0fc1a9a42. 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/bbf8fea5-bd57-42e4-aad3-03902581ba02.json and https://artists.proofprofile.net/proofs/artist/bbf8fea5-bd57-42e4-aad3-03902581ba02.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 0x839ab73b83478c408481e59f4e621b7a29b08ccadc6c739cf8efc496b1678a70. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDQH2155123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65497fa8d952fdaba3d81d4c6c469859554a9f61858eb5bb88f73b1c08f25fc6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDQH2155124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e131b65a97d216182ba267c677b0a13f3d9825412f496f3a3820be710f5782. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:49Z), 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/QZDQH2155127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23010e4df971e5e2daac8c4365941a7a0cd4eba38367b69b1988b74a33eeceb9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2155129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41ef4e04daee61e709cb1c046d120cd1ff0ced5ada8af4c7196a5b800202e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDQH2155130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dddb5a2f6a35c6bec670e985a15fda8bdf7e6e72563a93eadc1b29f9e34867. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDQH2155111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69fe6b7c12dcf8689c03a95ed7b79856d7fae1dbd98507f75405fe623eefd6d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAEH1981844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ebc41796e0ce4d56aad4f6997fb902a57262a2e9e714d95bfecd0fe054688. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:42:41Z), 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/QZDQH2155113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87cbb6349cf65747423ca1cd97b0e731995c5225bc070ccd862bb9c559677a. 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/QZDQH2155116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c96b58412a94fd144922e3f1fd5288f2f0793146fc0549a6e5d39f2939485f6. 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/QZDQH2155117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61582c0641b0b8ea6d5fc07c2bb66d060e919df98b1723c837018421b3a8d544. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH2155131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd992cd6e0fb2e471657845a07b6160ec0711c27df35bc187f762c21d56a00c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH2155132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd46e208aabbec9f0b6ccf674d078557498d785efeb7b55bf45ac612848ddcd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDQH2155133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe77a3ee1e341988dd3bb3e46804c94625c448727df331eb9d84562f7ad5c925. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDQH2155134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa007b55f98b798a3f874ba30e2a40c046a861a2d4769b3c1bb6e3c8f21f6c. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZDQH2155135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7882fda8af7da1e18635843b4382f46b60724f0a760342d6bb3471dd0347cdc. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZDQH2159104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debf08bfb0e566a5cf8468de9e206e0f2f7ad3349c230a5aeda43f73b823ce6. 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/QZDQH2159106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf174824992fbf290bc01c9f767fa0ec9c1894bd1b70bdd99e1106f7b5a773b55. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:19Z), 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/QZDQH2159110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921ffb1bb04cc5b32b8cc90e1db824d41e85cc62c72ba71f64bf7d4063df63cd. 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/TCAEH1985821.