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 0x0ed988a91ae3cd9ab0b47f0c04e92b2e982f282e7f792f2b0fa6e66e6393fb89. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d0acf7b-86b1-4af5-aad9-333168c631c0.json and https://artists.proofprofile.net/proofs/artist/2d0acf7b-86b1-4af5-aad9-333168c631c0.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 0x70bcf29c295032475305b538dcc839871d5952a4bff32fd3f783d365244a908b. 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/NOK3L2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930dfa123a2ff02559760b0bd61580b2a9e53b2400187047c5450c2dbb14857d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOK3L2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0f733f43c05a9e1dc2d690d8cb8b9d80fec5ebaa7cc686214525bc36366d83. 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/NOK3L2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2aea0100ad611cfd13f99e8e966ee0b31bfb0226d3a296b7d6324e226228e. 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/NOK3L2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38132f64de5932937a74e6530e9bd9cf9ab4f7e273881b420af4a8e2394e77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:56Z), 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/NOK3L2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860e97d2bb6aeacd4f060b24e4705b7794ff6529d3833be27b8a8a82fed5799. 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/NOK3L2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb7fe0b07d011c4e14acfccee492c15c5c15d22e6de0fa3050f817cc9110941. 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/NOK3L2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1820247236fc193790082e12e69b46ef32f22cd625cb159a58b889ad136c4f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:53Z), 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/NOK3L2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8140f1a7e9995a392fcdb4935dc745267856fd0440c3b32bbf9a6b599616e4ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOK3L2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d913bd4e0c088565e4650b073febcf8368590a8a59c92d118198a2afe19cb4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:33Z), 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/NOK3L2401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c9044e911c012d2aa29d17b80286efc87e7aab193590f275421c9b2f3369dc. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:04Z), 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/NOK3L2401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d913bd4e0c088565e4650b073febcf8368590a8a59c92d118198a2afe19cb4a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOK3L2401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8140f1a7e9995a392fcdb4935dc745267856fd0440c3b32bbf9a6b599616e4ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOK3L2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8140f1a7e9995a392fcdb4935dc745267856fd0440c3b32bbf9a6b599616e4ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOK3L2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc8fb7abaa291231e336169cb3c834ec84a0dabb105340fa98b42a40dfb01ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOWAJ2115020.