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 0x3129f8a2a68db08fcd6a89112f7c82e83bd463eb66d2d23edb2468683ca85ce0. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bddae45c-9f1f-45bf-bf1d-0bb08c1899a7.json and https://artists.proofprofile.net/proofs/artist/bddae45c-9f1f-45bf-bf1d-0bb08c1899a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Six Weeks Omnibus, vol. 1 : A Japanese Hardcore Compilation
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 0x8882c1aaa3139640fffd5393b4873d5701fb64aec2323fd7ef1336b9968971bb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USAYS0507301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54073d9156c83442e4db257e564581aa08f2a886eebf296efcc2506cc422929a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USAYS0507304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817adda0a9eb6959292848d0451a0f5276ea5bbe90c8956864bf811234d21d8. 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/USAYS0507311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b6aff6918f37f3e32eaebdbd063b03c61059cfa64ee15479965f38ecf12955. 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/USAYS0507314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ea19b8549f0f47d6512e9da37609016fec916661b573ae283cec9531522f6. 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/USAYS0507315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfb307ed98feaed42313c89bcc9911710e2df4237e9e53a03060eb2a13bbb4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USAYS0507319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9057b6aa94292e63aefa16c8a90ba15e18ec3d6d8b53913ae66992547a58c5fc. 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/JPB621600469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da22dba932b092b710e6fb7423795770d0d9d9d10028c0f2bf599567986588. 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/JPB621600470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75767e81c4e48f8919c573ca009bb60f4474ba9e757781b17461756ef021a530. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/JPB621600471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2443aabc3d042ceadaf4d89a40778bfe5cc10d9cc70fb2c846d1d45978ae037. 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/JPB621600472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22779098b02c3e98591a1309698a0a348e21060304c43d27be5015b53a7e682d. 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/JPB621600473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a6cbb700aa962e3bec4a45cc67b4229f96796ae9fc7d8c625c645ffc2c09a9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPB621600474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8916aed66020dab0af6f50a03ea53e4dce6910189df1f06398ff62e387e8d3e1. 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/JPB621600475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e6826b3de8fc3887d323a09b7677ac92f81955784db5cb5354c9a67c0f191. 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/JPB621600477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94417df5ed042367d938287877ae4d313ce0057ac61b96ae6ccedd63156689e. 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/JPB621600479.