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 0x7831e5a753f507f62b4325fd954ffe845d61f198f5ff4c7338cbfc49ff1c607c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a901fc7b-af7e-486c-9e9f-748a0eb0fff1.json and https://artists.proofprofile.net/proofs/artist/a901fc7b-af7e-486c-9e9f-748a0eb0fff1.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 0xc45a613bc9f884667f47b84cf85a516c050a2daa00c304a28bc65f9ad5269b22. 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/QZTAT2436357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2677fc036a8aacadadec945afaeb5d498f80036438c06427800c140f33c7d8a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAT2436358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1d96d5c217ba0e5eb41ad14c9b7b4a9c99b0d949524cbac095b5ac942e0fa2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:49Z), 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/QZTAT2436359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75b2d5ec1166b397bc61d82db34143a3e847c84d29ddad1bbca2e8720080926. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2436360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5363e76631d0a6df1e845871404325c7072c593f10fe807bf65326d14ce133. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAT2436361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e893a96e5b4dc029b7bd15a838fb6f0cfcad32c3e335d622d25f59f17bc8b4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAT2436362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7c39a79b7c7936ac2d62878a7ae185542e054526d2597b2400012ab8b16bf5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:31Z), 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/QZTAT2436363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925edc0b2a3c03c69d746c8ff1c1be759149db527937e06987089b2ea25bcd82. 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/QZTAT2436364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36897e50dec4a8fcd9e0342fa69161a62bcbab31bb8147cdebc932de775275a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2436365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a95460c25cbe7f7d110106756252e3bf3390dc6e0388248f6072288c7710b62. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:44:46Z), 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/QZTAT2436366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226181f90ac61fcfb72c9d5e9fa8efc72777ba247177a7b8e788cb549192a24a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:14Z), 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/QZTAT2436367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf796618d3d446b3b4d4188640b3511dae9b1d391f58a2c9a9ef4ff85992f1e78. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTAT2436368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ddd6b4cce831457bed3dba02299cf9ff7687c9cdfd991643bda08e2bf359c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2436371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6833e790dfbce24d8c6438f0ff26aecbf16ef03eae5c97da1f368f09d0bdc19d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAT2436373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17062a7549a4a51532bfa32e73da417c578a61cbe7c52a776b7971f954e7de8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2436377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2052022882526d3c6a6144ccb5ae5bb0b02e004f450faa2bd28924cb6c419c74. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:36Z), 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/QZTAT2436381.