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 0x624d685c4742756ecf4abf9d4ab573512c473ca82e756f8d7fd6caada1787aa4. 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/47829588-fc2a-4532-8560-328e154cec96.json and https://artists.proofprofile.net/proofs/artist/47829588-fc2a-4532-8560-328e154cec96.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 0x4743755a738668eb8d4d39961fd49d463b7872531d8712e77a4ac24ee0967ec3. 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/XLDMC2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb342abdc0b7ff25f7525fd822b72556af84bbd45d91ddac67a501ceb90a31388. 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/GX5MX2453673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd304704121db01606094185dad178fa3860a68377c5ed251b6a85a1127483235. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7Q2492507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b90b4a2c767a43c4a92649d71c6980b88b9506bf4151404dd8be91b71dbcbc2. 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/BXIV82499665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d240940a1785a3fbb406e0e85b0bd3da61cb39912736316551a33ea56a235a7. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZZ7P2473778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d1de566b008a73b58bace496e3eda8f56f4c21cdf2fe275d36ae40c39d1840. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:39:08Z), 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/QZFYZ2523222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b062fa6e3184d5839c08d8a296c71fdd205bad6df391b946a36cbfecd3f18a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN42547476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12956a2017938b8166b8dc908d0e73a352c790704ea74f0c4581470251e80363. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:21:08Z), 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/AZXLD2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48620667d4678a9974a9d2f94b78abc0965858906c98990ee8e0f6e69f88577b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:31Z), 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/AZXLD2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adef5f0f405afbd16295fb9dab5bd54b61243e8f288e476602c3fa19c31ddd5. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:47Z), 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/AZXLD2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ff3272772804eccf443bfaa31b96ad22954ca761e4ccfd2b87b32e4acfe1bd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS642500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922fddc84f552368bfa211a55ea614f0e063943239a58662947bc83a53ff124. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AZXLD2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f47f3aa151bce67cb9ece5041f6f9b9ac60fd5ac9ed1d9cb018877d0304ce4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/AZXLD2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d4eadd3d3af8f624c87dc08579ace3f6c06367eb239bfb900814bf0f56d4a7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:40:57Z), 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/AZXLD2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c86e95e34af4c87c43c728881799ebebfc64a412add3c6de9a0bbb0d257597a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AZXLD2500097.