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 0x09418132b566b73cf79c1cbf72a5fd8b8e042bb2fef853bca18ce45c5a8d2904. 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/3584894c-d957-49a4-ad03-89fca7dea2d3.json and https://artists.proofprofile.net/proofs/artist/3584894c-d957-49a4-ad03-89fca7dea2d3.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 0xf6a785b1f1be8d86135cc528392ed4ecdb54e16bc74ebdfac993d6d08dd45ae0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:18Z), 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/GB8KE2053854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0624511ec8656ed8b13cb3fc020e11b53340b1c1f21b6416892da4eafd9a00e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GB8KE2164118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d602523a47234c738337e17298d4ea2ad419f9fb951c53ef7a1d37b00324d42. 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/GB8KE2404281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbd7fe681a0049cb0d9a1a47257f374d2df9221bc5261b9d5b5df3ecafd14c6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2506908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a27696a7988beb5e8095e415c66f43fc3eca89f6f5b50b826a156394a8aee0d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2513972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1fcf7acaa58b1ba7ec7b4568dbfe899a8a2930869d279796fe22e83b04ee81. 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/CA5KR2517471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bfd52d3a5329468c6a9da87e9314bd1c7659c82fe0a058802e741934a9bd06. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKR6V2540389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ecd30322c9bc643c10402b136122af3244e15537d8012505f30dc33a0eeb2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CA5KR2587064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35651cc3bf1c72ffad342280700f27d3c7a502096225c289e0e1179292b1bb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:41Z), 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/CA5KR2590508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a299be378f89936df4dc52969e3ea02a9eb14fc1cdbbf055d318028e6bf633. 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/GB8KE2421625.