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 0x25443fb71d6738f13104c7c70147489988c092baec501ca955a8d8e396e53de9. 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/b9c60583-5865-4926-9eb5-f9381717f279.json and https://artists.proofprofile.net/proofs/artist/b9c60583-5865-4926-9eb5-f9381717f279.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 0x88a448d47938531b64ce466d9e0d211836f8b088fd07662d23bcd4ae3d8ee97c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91748161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383cc0244038e7cdcde27dc630fb5bcde560a3870ed3186dd68d715dbcc1d488. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:54:51Z), 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/USHM91782534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7efbaf088316a92d909d717656adba1d1e156c09894afe0880e33366ebc8f1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM91782541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2439fe27ecec05ff7d49981866ca9ea817ae450fb021ac13e53e9095196f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM81844254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf604374ca3abdd3d45bbcbdb567f18f323f4e0edc710b2e197787c0b5a3677e7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGH1872295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c2b600f9b2b3395f6ad6faa5a6147e8b867f4162f3ee46c3e0fde833823811. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81844259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d055e0c7541fcd12c921cbe6f2f6bea2e05600349f4b4e39141bd1b4412b45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81844261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c4d070ffdfd78cd29649a8d1521188b4649fd9a3136f5540c244e5d917f73d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:33Z), 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/CA5KR1949625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e646da7e1e00db309ebfb437793d45bf88ef4308db298b8f04cde7b1743177. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CA5KR2004026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236cd4ebd0753e2a598954aafa4dc6ccb5a4652248db0d7365e1bf01a45e4231. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:40Z), 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/QZTGW2100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166dac20fe0684980b403f4e7a76a08377887e3d3bdb2f82bb14534286678417. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWR2521165.