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 0xb56f2949ee357754dd44bdde3320f96f65a5e13c5103360f90bd5eaf13f1b377. 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/326c3542-3286-4a77-a498-ca7a270ecb18.json and https://artists.proofprofile.net/proofs/artist/326c3542-3286-4a77-a498-ca7a270ecb18.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 0xc51b6205f5c79ae90fccf981c34d765fc3b6b17345c5715c939fda57fc1ad83b. 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/USHHW0700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2623ab86fe428066351f4c3a31f6c11dc3ebaa070060b79f1032ef78d7ec7d9. 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/USHHW0700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79234b54460d2911f0a19547c6591ff1796adca31c86ddb471acb2be8a1a6c64. 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/USHHW0700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d81c1fd6b2c169a17f098f6406f3e3b14ba6651e5b998113c1d732c6208ce48. 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/USHHW0700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7f97590bc2d3bc55c9d0f5c352022747e36bbaf9f2f0692a30303d1e89748. 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/USHHW0700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405659197e5c707d9e86278fe2895be18ac9e4a532a9dadfd5f0c3374527724e. 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/USHHW0700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ad95d663e7911edea4db4c47b3a62989d881ba0145c3c83ec97dfa6b095999. 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/USHHW0700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c11805e46cba40c2df7e31b828749c132dfb17e2f8feb472448ef4cbf792d26. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USHHW0700033.
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 0xfa62853b2e514227017a9b38c57198c63eb4e28fc8a1103a655f14353d445737. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHHW0700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0718b780a9eb6abb25771c15fcd87cd2b4196f76b6ef7ece344db7344180f344. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHHW0700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fc04d91de3dbf948b0a97abe27aeb7ce7763d57df11f5ba19e995abb265910. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHHW0700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7743e2f1accf7cff07eadb69a61ffaaca956b53c8e56e90ee4e5b88a072e95. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHHW0700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c534c464a4e70acd4e2dcd5fa95aca61dc43666e9c4aa8a98d159f816acf5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHHW0700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875c554a578a25c59ffd22fb5b2c7003fb0dcf9b79ac676f132a6ba52927037. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHHW0700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a842aefe2fdb69a428c410bee7aa3ac0c05e8890120243f14741fb935803b0. 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/USHHW0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9611351cfe94440cfa128ce098823033d3c3a14ba0c05d30a3b2f0d0cba7057. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/USHHW0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4845ded2c18b09e79cd36eb8127c4532696324c5f1205e5f4a8724adfa2e7204. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USHHW0700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a7305e687d586d52ef1e1480605008a89145d9e90f0fc28f1e4df57179f54. 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/USHHW0700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a8bb82ddb43e24807be438013bb757193fc30de30ebd8901a69f7ae6cbabef. 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/USHHW0700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817594848b8eb9fe9218f70c18d890c5e4c73ad85f5aa885393a0cbffeae9fd. 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/USHHW0700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa5b24e3f9d5794b0e888ec882a2ee8df204d302967954964c00b1367ca0f99. 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/USHHW0700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a8ceefe8fe51fdc45c5e220d081a2bbf6d3d1b55ab70a7655bacb7c56ee491. 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/USHHW0700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffb92dd988d968f618784747f99a26e640beb620682853837e1879709a18393. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHHW0700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9f3c2b9ec17212cc54deb52c16288b596a78c403cd2f0af947dfea7c58ee9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHHW0700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e870004c86bf0463cccf68627046054345b332af95d07462d49c09f06a3fa3. 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/USHHW0700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497ca156e26de5c7be65daf13a5d2b0980529e5dec734b70ed1b7e64c629f31c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHHW0700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76aafaabe4ae5004dde464c0a3d5ec3f6409fad21c22ea01f3355f01235ba8e. 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/USHHW0700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e450968fe93020fbc2c327bd6e799a08cb6f0c54d5368ee35f7ce05474ca1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHHW0700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c38b1b45068b41b8874feacc40642ca3d6866d886bce96dd96912499b6561a9. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHHW0700031.