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 0x9d7dba1a734f43316abbef4922b66c3875641e9ad9612b80b45d4f8e781f196f. 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/af560ad2-a6ef-4eb4-8430-99a5260a6108.json and https://artists.proofprofile.net/proofs/artist/af560ad2-a6ef-4eb4-8430-99a5260a6108.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 0x655e9307c67025bc5a90248e80c2405998274b18484268a6fc2010ab43b9a2c1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:55:49Z), 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/USCGJ1918510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92fdf29e6d44c76d0d43e4e65a240dd99baa4b6ee8f2630a7d07ccadd5b3f6e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM22173661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad166f0af9dce29a9e0739beba80d6b303fca5829373f40ac7e9441d47445cdd. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:23Z), 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/USHM22197305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad166f0af9dce29a9e0739beba80d6b303fca5829373f40ac7e9441d47445cdd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:37Z), 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/USHM22197305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295ff48e4b2cee6d72af6194b5481c4bc8ec9866a280145607af397f84bb76d2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82116904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26266cd89e7498f1264f3b527ea1f152a40001084e68bd40902fcda3cc9d83cd. 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/USL4R2139326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecfd7553375026d340fc781ce83447abb8cb26c6a3aca90b4a757abb7c1ce51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ6ZQ2091420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f85e2b6078de936221502633d002185a86c6cf54311ae53ebd77d1c361a574. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZ6ZQ1685718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005e2339ae99cc61a959306f7b8f2b8766461415a234e5660c766dbc86579b1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ6ZQ1871517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b20b541a069c62bedfd30cb5ac461345670d18d7d056f6edb2a403ae7bbc704. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US3DF2269457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8176a3e54d8452a4accca77a725a8cadccd63b8cdc9d254e8dc438ebe213ba84. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:22Z), 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/QZLUM1789532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c6c474e23457722ed427dc30a595af9871e041312b5e6d6becf2db7b2d9528. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:31Z), 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/QZLUM1912720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c4bc72386fa13ad6854f67e5a1b2ede922137f00c10339a60b6b37e59651f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZLUM1777341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba9eb1bfd157f7765a0c886032d95930bf5fa28abddde7a35587084745a499a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:22:30Z), 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/QZ6ZQ2001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fc9c9524e6f2337ea2f76f193b5b477bfa72ad092bbcd821530d69d12d44f2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZLUM2366811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aea1aacb2e377998824843c55e6a5c3af2bbd931ef9ca5fcc9e6c1449388bf. 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/QZ6ZQ2001083.