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 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 0x05bc0e28a09bc623212eb7f14f4d1482501d0a18267beafb9a48c3c517d7942c. 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/71508ff7-d96e-4924-ad04-496053bf7fc2.json and https://artists.proofprofile.net/proofs/artist/71508ff7-d96e-4924-ad04-496053bf7fc2.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 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 0x41e0dfc43e3577737b217fb91a0326f8893e962b31899dab5c55941df56b4c40. 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/GB8KE2200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997bbf07e736bcf1bf1a84bd18aec6bba79b8a84fa441abe964c9376732109d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e0dfc43e3577737b217fb91a0326f8893e962b31899dab5c55941df56b4c40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5443f280448093bd682b4320c3bab0feb309ba6e121f2fc64fa4ce2b46f7306b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GB8KE1954132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2a419e33b7c0a605159af736b52e66154e003489feb5d7cc8ffdc4285cc33. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GB8KE1857153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6639f9d3323d54317ee86e34108b7e5511a8d9f61efdf717942356a2984003. 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/GB8KE1857156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9008a046c422e92ec4ba90f7265d838fa44a4c773fa881870e3cda420f84cb7. 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/GB8KE1857159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedab9ec9b475ac7dc42d6a6edb3538008d11cbb0c3a1cddf01e2db6f690d52d. 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/GB8KE1857161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a7db0ae42d5740a533d1fca4bca90c41fcd7333560205ca974b89bc005b27d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2306802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc9c6c172afd437e6f319a2fe8b175af7619b5ebbdd44dfd0b7879187540cfa. 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/GB8KE1554069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0f130660b69ab78b6da1620ff81f161de3697c91753b51647ec7309133aa2. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GB8KE1651157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4b144eebc2f0721f51c24254dd8420f4489ed09ae06594d251a76bd5002e40. 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/GB8KE1651158.
Cowboy / Monster Sharks / Hooligan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc9c6c172afd437e6f319a2fe8b175af7619b5ebbdd44dfd0b7879187540cfa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE1554069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaafe04b0e5f97c0bf56a5f736024fe40f5bc64be7a432be17707f62cbeff91. 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/GB8KE1554070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f48defb842cf5df45464ea91d7904560aca0585badc1c7ace3df7dcfa05e75. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GB8KE1554071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398afc72e5e7d98eccdb8a18e8fa2da7c388f3907a764b6f61e16e0c83526a8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE1559992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a81447d024ebb7454051c55c95bb18d9a728a9d6eec25bac5972678001115. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE1559991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a8ae4a239a00e04a985c72f3fa4f3ea801b029ccd44fd2c0d9aefebf7479d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2303368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5a9c9e238a3ad7b927f605aba726a46b09dc92d9875cc4d95a101aa06bd83f. 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/GB8KE1356255.