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 0x9ca8afcb6a1c533c1da54782bc201299adf573bfa395e3b6ed95de3d9a18c749. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91319141-0a45-4697-bce8-3f91b296a156.json and https://artists.proofprofile.net/proofs/artist/91319141-0a45-4697-bce8-3f91b296a156.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 0xbc86b8876e7e6b4d275328dda6f3bb4fcd4253ba318e2cfd36c941dabf6a5d43. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ATBL62022063.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036788a2194b9e193ef84ca572048e2c17d7367e33d4bcc7936b8d24f647f078. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ATBL62022066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61f0246b50c6ba6db7b1977722dfb4222ead907d1391ea4f8eb0e3ee1791d8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ATJ002400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9c44561835a3eae5557b15d535a202bdef0a6c7f8af9d8aa6d38a1e90528f8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:41Z), 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/ATJ002400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8a2250761129da0df547f07f099cde740a138164edc53f260e983aaa07b00d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:21Z), 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/ATJ002400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf85347449971413bc6e02684957cf73658de6ef1fb14d1cfce96db8674263. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ATJ002400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7509a766da2a49de0cde7f2be7b76fc37893ca67c1c1ae45117d0ea73e8ca. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:31:22Z), 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/ATJ002400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d0c94d712b2b98006c60077ac95c394e73bbb12019b806d0798c6ab4b529b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ATJ002400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c895c8dc558074a4e0bc9b7702a7408ca77a12d737bea090bb7087f55ee96b3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:25Z), 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/ATJ002400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602747b17cc67e9b3070c796489c52d1d463eacb8be1a39e84a8028b4b918abb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:36:36Z), 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/ATJ002400041.