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 0x03c136acb9cbc2f9b45b00ac43174f3b1f2da78d7dc8ffc25d603d85ade3bc90. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8cdc594-9b5e-4329-939e-b493293ce7de.json and https://artists.proofprofile.net/proofs/artist/c8cdc594-9b5e-4329-939e-b493293ce7de.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 0xbf676272a603974c7279bd502f873fc276ed2331f57e9b339ffa6b1b2ecba294. 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/QM7282491855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf676272a603974c7279bd502f873fc276ed2331f57e9b339ffa6b1b2ecba294. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM7282491855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1fb45b22291073fddec5b6ebece6d5ef60eb2df7a0caec9f81e7342ce94140. 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/TCAHE2331693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb121fc06b6998547af432e175a64c42dce51578b34a0887e699e9bbe6125e7. 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/TCAGA2274132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c79a799123064587191c35883ca4162f2780ea91c3f9e3ca19960d23ab6b94. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TW2139817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df26d6ef57274d9fb38405c62c9aa2e5c841847a7ac99027a553afd243b561. 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/TCAEP2050084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e0ed7db69bbb4909586f3479a578ffa3a9ef53aa1924a436f1700f65150777. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHN2306999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e25afc354db582c8d4b8af585dfa6d5ba35491cff3540aa8cb64a82686962. 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/NO60G1801014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de032831b7e90c55c6fbbc6f41fd7e581dac3756b338f16be954d825da9e3e7. 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/NO60G1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b1b8ff67af7ccf9de5d89d300ac6926c102df75557e2ac09a31a896f149b87. 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/TCADF1784044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d7b3fb635fd8426a2dfa90390e51197593f0b8c3af9f5980bf7f1f80167fa8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADC1726834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fde39525eb76026f28215480942f734387f3b90709383ef76767b497b4cc42. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADA1798128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e01e5f555ef75fe08d79707f5c3bd6336dfb50f33ad5e81cfef0249a33a009. 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/TCAHJ2381426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663ee94c9638de0780e3c424b0ad0dd604b1c3f60b571cdb622946d4ad851be. 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/TCAHJ2381492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d42085a81354dab4984c7d5c4bb572db96b63ecc50062571dccbcbfb75bc67. 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/TCAEX2056943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2942d804aaa8aa7ae68dba49c93519d1abb8eb9cf9f60f36e2cc8ccfac2f46. 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/TCAEX2056838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f0862db410a10a8dc66f2faf9f8e4c94c3fe7ad284334322b14052586b594. 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/TCAEX2056712.