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 0x583c8e154c1404081f21d7ec0bae94db79e340d4ff6ee737e39ade155da977bc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b367c04-397b-4605-9ff8-563292194d51.json and https://artists.proofprofile.net/proofs/artist/0b367c04-397b-4605-9ff8-563292194d51.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 0xe6791b143604b2de0aa0031734950fbb2ecbe58ebd673bdd4a56f0deeb05f63d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/US3DF2219779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210086672654cf368979c09600ba4bc42d3981f3bc961c1280e4a8acb9d343c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2249100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe0573ba1bc8162626d670daf639680366702236b6b57f7e584f1ffebfd1f80. 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/USANG2273707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a46e8268ea8325c407a08dfc87f7d3e384aa68a0605dfed993bdd2be08326. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMANG2205783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250dccb89f363fb38cec58ac5cb347fe315b1f6d000149f7562aa9a9ca82cf28. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMANG2213281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21824b9f1036c3e8576d1d290fd51986c72063e56cee5295b967807391d180c3. 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/DGA0P2498666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de05ea55cf74b3e91c344b8df298904acb43086ded2ff089c8040259911a1c. 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/DGA0P2498667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa4431c4f17ba48023ead7746b45811e6285de64c39221ef12af1694922506. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:08Z), 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/US3DF2522114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b63e0690f9229845ad3539e7a405e93ecf759d7f8c5c23c290a39ca8e3427. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:14:17Z), 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/DGA052566422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f6776613cabb1b027f74c67249e213b7457b1abf44afe1d3013623565567f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATUM42100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2508b7de66e768f0489d0c3a201991c5ce56c3c506b962b8ca03d8b3531d23bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2210440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf51d224648d33f69d13a88518e64693c8af6910ece32040799339a6792358a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882231967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe207f114ec62d48463e5b43edeec25f698a599739cf281a893c6b4c9f83485. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2417657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a238512dc60b3ea2c0588bd814044b1014a9b93d89dfd5d4429ef75d17bef4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2076775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e8e490dab079e3381b9a0b0e4d9303e4d999d9306e1ad896966abdfce4f14. 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/USANG2233431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596ef7824404bbee8453fe30b3940d29465848353f814d2faf94601e1db4d58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2169186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcf8643e68fa1c47dd8e0ad37598a0978be905c7c7dfbbf1fe733610ae95cbd. 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/QM3DF2270049.