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 0x6961a7a6848b15baf9e480e5feff8e5cb9279adff3f405b21fd868e78a0fe719. 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/450a5383-56d0-49e0-a485-af83230fdc5e.json and https://artists.proofprofile.net/proofs/artist/450a5383-56d0-49e0-a485-af83230fdc5e.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 0xa0c8c294be6a4c07b68c6b1dedd7f96e8fbcdea0cab5b79d300662d6eb2ad9ee. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPJ222101631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae46b6f2e5d6f5e1dfe59bfb98995e5ef28e90fbfbaa9d87a5dd805fc5be34. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPJ222101624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd02bcfd39352270ca46108ee09a280aafc23920e58e9feb27d3e4df07188acd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPJ222101632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3235b3c55633b86739bb7412e9a0b6102f8d089dfe61396ed5abf7561c16c97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPJ222101633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91018c1938bd1efadd8b846597d227e932648f2019b0d8ac6b94c26bd75b31c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPJ222101634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2613e29a3279841518007ab3881732b756ab093ad3b4e2887a1bbe2a20027e46. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPJ222201898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a825e1fc93353196e1ddd4b799f37cd1de5b0bda61cdb7b3a5eb422456ccaf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPJ222302470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2613e29a3279841518007ab3881732b756ab093ad3b4e2887a1bbe2a20027e46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPJ222201898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae46b6f2e5d6f5e1dfe59bfb98995e5ef28e90fbfbaa9d87a5dd805fc5be34. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPJ222101624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df32a693474031d54d3bed065249ff21600cbd21e489204e2d357cf369817b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPJ222302471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487c0e875786bc71335b5ab385259357fb023b243a3388cd89a128ef52fbfd0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPJ222302472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a154490b60e891fd3d00ca57128641b90dbc07ebed9ec64e9fdcc1a30316b0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPJ222302473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ae38424272ca88dbac452397442c5e0a721ff1e07d1ce8b7caa59028456b8a. 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/JPJ222302474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0945e676da79e999dc5e4488c7bf7ce835894ec90cb657294cc017ed57aa0977. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPJ222302587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac383dd6cf0c5a0dc2133fa205aba345d464a127820850890dd0c1877118a362. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPJ222302735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43923a3a949573f0292e87c0a92579a3a796b45db0edb77a65ee585789682da7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPJ222403189.