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 0x0e6223d16d0513886bce47ef153026ea8bb424ede30f3c5448df34814a2c5c85. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1bff9eb-a5b4-4dba-b887-c8c0772a01a6.json and https://artists.proofprofile.net/proofs/artist/d1bff9eb-a5b4-4dba-b887-c8c0772a01a6.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 0xe4657e11de6942b727d5e354c44ab76653c5b56f863f747b80976ebbd6994603. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:11Z), 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/QZTBB2376818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5544bf5c12aa76d5d86de820a664302250fc08020617fef67650e3570b558e4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:09Z), 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/QZHN52568493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b157bcd72e36af813581d24e64ed77b42ebf2d99d2d47038603215e361cd3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6F2574519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2082d3d608b3176e14fe2dbec264a762c2b8ea490658fe7566d8291cb13ca61. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZRP42514770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94f9a62feb3b04845c7c6a2c1606e47691afacf8e7183e2b8acd520f8f0abdd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:12Z), 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/QZRP42514771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f686322a80e8979fa6dd1a032cfbf8e410e35a5544c4fa2dca709b741b96ab. 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/QZWFM2531721.