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 0x6042ea764edcaf71607cd25e3691e6e61ddda1fe6be80d6f5db9ac0c1cee8240. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d10edd4-630c-48a4-b866-19027fb8dd5d.json and https://artists.proofprofile.net/proofs/artist/3d10edd4-630c-48a4-b866-19027fb8dd5d.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 0xdbd88267a92509780756e8c70a6c48d03cb82061ca39f090dd687685a4cf19fe. 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/USSRI2007701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff6e1555bf6412b73194f1550b086bc007b61e27ff8d614595ee1cccab4b39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSRI2007702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b68bf91d7fef9afef1a7bc55e3c5bec6f28da98493b04ff337f437c82a39d05. 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/USSRI2007703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c46eedde2b4e6e6816f9d5d2d139a83fea6769c160b018bbb10c708650be2b4. 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/USSRI2007705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288111cb61aa899299b51f2ab09b08f1388ec5b26f61a7a3c616f6d2bbc41ae8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSRI2007708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e3e18b629b945aec79dc8a67f76b5d0e59acf6abf30ed1d2ca940fe9524c0b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSRI1606801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3243e281c7264619cf22f6bf1471eb25b453dc12f3bdda149c3fc1fc3fa695. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSRI1606802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41809ec554594cba20be60b55206508706622629d597ce5e272d0e869f46e249. 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/USSRI1606805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4d477a329f5323c20ffb5d1435adaed2808428c3b05136508c19f9db95c9ac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSRI1606812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306f6081ed1a92ef8b321dec4f03570bda2659c6486f3458a34b3d1b6a94af0a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USSRI1105208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7729739a2527853fb713a6b17ebbeb7bfa744d47470cafeab1e9f161a2144465. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USSRI0301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8708efdeed87353eca0be5132bf66e86c99c1401a73443f844e887b48a46db. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USSRI0301905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb58bc6d96135f0f506e49a6c83f479360d9d7db414956488a2e2eb2984f25. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/USSRI0301906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d6ad7bc1316d11863a977eaf1411bf52e126529bbd1eee16aa4cf8c63c50c. 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/USVK18903708.
Too Far from the Bar (feat. Little Charlie Baty)