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 0xbe69d1de4d1b5b5088b6c8a502e4a074c863c072793993ca3b951fd091bcbd25. 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/ce952375-bfb6-42ba-bdab-0c75515f9435.json and https://artists.proofprofile.net/proofs/artist/ce952375-bfb6-42ba-bdab-0c75515f9435.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 0x8b3fb63faf57892f979452ad87581e95230a78e14f9b92d5845bf976c74c92dc. 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/NL8RL2317542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10a8d3ac15dd246dc6484a6b71e1494956a19599a83d838e8cfbe46de90ba0f. 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/USA2P2129521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55750bcbade2826ee92bd62825c9da6d7c1dfd119dc5f9c992fca4535510a8d3. 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/USA2P2129520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f69964cfe58e40c5cbae646fa2059bf16f0bb1f964c22fd8f75378a74dd034. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P2129519.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7930d6f61d233ce57a16d52b9c122f0f4bd32412d96f1233c60e9fb36c5634f0. 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/QZMHN2033319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aec987f94f2f2497e551ad73aaa25d575f09b993bc3edd3edf4ecc3f8ba16c. 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/QM42K1918974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570369f8872959040b4bc1fb8aa3f483275f5170f451a5371590b9130432f9ca. 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/CA5KR2044371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20628a88be802afaecfc05b9e68bd2f6417f91a93634ed6b75f9b764b58e5a2d. 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/NLRD52302484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ff616d8b0f83b6552a381c63b6e54e46671a75f8c073ed56a463259fe13a0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:30:13Z), 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/CA5KR2437479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0635acf92d204737e5450b930050dd9c08c9aa67368fc9ef084d1e0754a38d7. 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/NL8RL2413109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ed2b456fd102d68afb2df049672f3ada7de36259ddf9f3f3df1bfbf48ed74. 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/TCAEQ2003931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc400fd993872d29b3bb5c386123fc293f49984958a86c830d4f5dac6d6c9e085. 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/TCAEQ2003941.
Castle Walls (feat. Casey Cook) - SubDocta Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e25216f07dc05fa30a67441fcabe62994675ecc68800fd36e2f9ff5df5ee6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBEWA2205075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c65dcf74288f3df326a8408c13a2ede76a7cec411d96d0a477a412ea13dd7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USQY51796368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09aea8eab51d6a6ac84be3faffbb4301d8b2aecd2fa74366461bd1e57d7623e2. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TCAEQ2003936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19cb2d2c7adf2bf53b16b044ea9cca8ae3a25a4159d5f710757a877c17969e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAEQ2003943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c8c304ade0a4d0f080f3af4f1c7cb708895e4600f6ae0cb6bcc70a3f7e770. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAEQ2003945.