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 0x199175633c04a31ce7a6051c3c0084f6d74821f35fe3cbfcb554caf840ca9e14. 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/3fb3353d-a46c-4871-acae-3052b58e29e8.json and https://artists.proofprofile.net/proofs/artist/3fb3353d-a46c-4871-acae-3052b58e29e8.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 0xf92e7667eced8eaa8763343f7c8d5f8b346d79904547e669ca40089edf36da84. 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/TCJPQ2140048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ed78e5d7fa05871a0e4967faf804cab99e676ff6a4f8a48013546b510e3a76. 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/TCJPQ2140052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc67cb8b07af1d0ed55de9ea3b6a426c3cac503e723e113a86000b4831efe2ff. 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/TCJPQ2140053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b181fba6df2c4c438084dff15229a88f63e719dac67c88b061303562e8d826. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPQ2140470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218964580cbc4e5406a3bcd1bb60eb70568254cdd4d9a9ef2b8e74783a4a4ed9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPQ2140486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd7a2092b354f974a73d7f77d256f5f3bee9dcb8d633b29198c7e1c8edcfc6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:19Z), 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/TCJPW2362652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20fb33eb83400647b48810991b0b9380b39ab7a43217ae4835f641d88cdd380. 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/JP92N2383492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8792255a067e42c9be5355b95d8f3e7b6ae3010abef819420aad9a21a2d6215. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/JP92N2383497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4a37501e55327c8e862c6d5481ed353c7f124962e075de7cf11c5535ae8251. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JP92N2383502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518885d56995b6dd5f28c6ba4259418358f31b2c4160fe513667a73a75b1cde3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:51Z), 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/TCJPB2498071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe989bd05727a77e312b7113a8fdfe6bf5f1890d0ef0564600f8759dffa801354. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:45Z), 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/TCJPD2568866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f949ec82d6097654df1a854e776b929dcbdeeda4187c64d2a2797baabf2bd4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:43:22Z), 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/QT66J2574078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b2cf04c0cf6b838dc4ab2be6980338e33ca4c4da3a27a23d9cb1a3a7e4170. 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/JPY392401768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294527e8bf73df0192cf60dbbd4e6bcb9ea144933321710eea0c95fd6e6ed96f. 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/JPR562300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791caf590345efa7ae512a625e5edd30155cd5ac36b506d26a2d8848f65885a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JP92N2385411.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch