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 0x3d9d3936cc8a172e91d6f625fd896f4206364e2db01e0874c76974e230b0ea31. 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/2c21a3ee-3e4c-4b07-aab9-85d7dd6c151e.json and https://artists.proofprofile.net/proofs/artist/2c21a3ee-3e4c-4b07-aab9-85d7dd6c151e.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 0xdc1fba52b311570f12cd3c2806ab5f193aa731caf5a4f6c6209ea59d3a5a3fb4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1250672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0097cb6dfc693d749a717341fcc5c40e5b90368df96da308a7742dd7988f99b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBKPL1250673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fd54e70b18a7b433d8f76ecc1bb7724a943e223f3be8b239142cc41e3ad668. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBKPL1250674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260d2b9d23c814013eff93bea3fac01ba1841dc5dfc3b1ad13c5de538124caa0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:32:06Z), 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/GBKPL1250676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ed48cbc198c63052041458e826aa0bae84a8609a0920983d396fa1ea3b0cc5. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/GBKPL1250677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac226b765d48a89824f26634acc0128811a39af8ba1acab2a706bff48e1833aa. 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/GBKPL1250680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db5d24cfe1f0b8ff89cde79915d431fbd226e268c63dcfed316e3e99314608a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKPL1250683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f254996a4f566576947528da658b9caa4286e8ce67e852abbc79ad0b0a7057. 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/QM6P41497077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad967a98c1e0052c52e69c1abe1455c280c63763841f5fbc4e121b4bccd0bc0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P41497079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab959cd10e5507d58e7e08a43d46b3c3962c2e002096c3066b5ceb8b49acbe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMBZ91663936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789f97dd57e6fb64073d1e8e86bf1163248292cbb3f940c0c40e1c5eedee51d. 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/QM4TW1797846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa9c5cff8271a066da56580b73894783186d3c540dcfe5301b807170ba33db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N21765108.