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 0x8a20e4abc158d84505adf5e81909b78de66be06c3438cd89a7ca9d73a0353976. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aead41fa-328a-47d3-8a4e-1a6f22ed8bef.json and https://artists.proofprofile.net/proofs/artist/aead41fa-328a-47d3-8a4e-1a6f22ed8bef.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 0x48401027110a6b62b7c9171d3e7770b36716a9045b4f1edad11eb64814379e13. 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/ZA56E2304164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80e603d2bcdafdbda6a1ebeaec61b44e81f02582ac7056b2463f788bdd5f15. 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/ZA56E2304165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e9a4945447cc65ff2b208d0da40929696d272eddd1b6f7e1dfe75253e5451b. 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/ZA56E2304166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969ab045437a44f84003dbb4862dcbb1ac01c3dfeaef02885cadc8f8b7b96ab. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ZA56E2304167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf68da7c0d9a1ee5fe43b578dcb5bac8ce09e6740f12ef101cd9ad52882bd27. 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/ZA56E2304168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aee8ef31d803e8be669c62020bc0538b4cd9dddac0dfe3285bc835e09432436. 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/ZA56E2304169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e9a4945447cc65ff2b208d0da40929696d272eddd1b6f7e1dfe75253e5451b. 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/ZA56E2304166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80e603d2bcdafdbda6a1ebeaec61b44e81f02582ac7056b2463f788bdd5f15. 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/ZA56E2304165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00196f40f0ea154561fa3856487d613a90529cd1f637007d903e8a0421f19c. 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/ZA56E2303697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae49ca6803aa6ea8e59c7034f019b7db5abfaee0e74997924b6b28f741c2ef17. 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/ZA56E2303698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d70bf2ba3ca4e4527425bbdc3111bab8ac37d8eadf3f0a1d6edef5796d05a49. 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/ZA56E2303699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6394490544db1876feaf70ac082ca3fd2086f82516c47e4c80744db274aded49. 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/ZA56E2303700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6e6fb363cc8b5b66509d81c9aaddddb351e174ba2b4fbcfc42805d4ad40eb4. 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/ZA56E2303701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00196f40f0ea154561fa3856487d613a90529cd1f637007d903e8a0421f19c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZA56E2303697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682e255e1d3c42bea74f0605fc56e3fa354ea423a18e395c07f018bf3a288d6. 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/ZA56E2201163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1a4921ab6d32b336648e329b78a61e928abb7e6511306e20bc266602cad071. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ZA56E2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b128d9b3320e99f0c9bbcb9ade1dca8404d840349d634c16518d802f2e5fdb7. 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/ZA56E2200069.