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 0xd4e3c5e2107f5522bcd12c38cfac1380377dc97391b0b86090146ed030a9dab5. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e240ccba-5f6a-41ac-9043-c18bdfebfaad.json and https://artists.proofprofile.net/proofs/artist/e240ccba-5f6a-41ac-9043-c18bdfebfaad.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 0x221853cdaccfd101067af3db42c37e13ecfa5b0976adddea748410c47d38affb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USW972400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9887c536defb229211cfa4e03d9a57abc27862d36ac8752620aa761d453b6925. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USW972400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd602800ecf22b9165fd8149a07fd18bbb0c65c80f8bc1bf4a7454561ca56603a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USW972400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a40f0427e551a2ec27d0b49c3065d1fd312f04f42d3434201bf24c6051bc5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USW972400562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0587a1d44092849d5352632189ab446f954d6609c0a4983e5551b68e42332b2e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USW972400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7cee38d03c24b2df0a66ee6d7f1ed0e886e534438f7cc56d20c032e6e69b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USW972400564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259767334de503b122ea40f8262dfbad59fc1695d3237845a2923321a207cb7b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USW972400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b5d98346eefd0dd61fc30e6d43e5dedf87efa15896efbd284e64906f41e23f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USW972400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e5be4509aae21138ce380b82a846a6dbc104edaa52109d96ac34f8a2879b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P2399947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a80d80feae5a7df99ca753cc5a9e6ed88b88229309352a564990cb881d4ad1. 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/USW972400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d68461bf3942b7913e6cf0e4514b2c2646c2c6eb6fe7c39dc05221f431290. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USW972400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de6444424178dd53aecfe5fe7a7ae0e8396a9dde135a6310983b7658426d89d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USW972400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ca67f6b7d945358034eed8f2294f7d84ae3b06b5afb61a2d8cbe6588367252. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:49:12Z), 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/USW972400570.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed47f8c5c9877ba95c3938e345902ceb6cc89519eb53db7006e06ec954c9cd6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:36Z), 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/USW972400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32baa27b8c1b95aa2760fd6725331a2c6e0991971ea409605008bab882a01202. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USW972400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac0a17b75c5e3dd2bae8c0cdb332a9008a3be7dbb31ac04ddcbfc0dc3653d4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USW972400574.