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 0xb267c262270b3d55c0004504faacffc2760e9ecb01f71f164c55e719f8e8281f. 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/234a8737-aee5-4cf2-9196-1a5a6fe3d68b.json and https://artists.proofprofile.net/proofs/artist/234a8737-aee5-4cf2-9196-1a5a6fe3d68b.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 0x6a923c89437fb8c4e39c2621bd80769509a34c6867ff28dc9cb3850cb68e5408. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBKPL1788763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01eb120ed1e2e9b8b6f0646020dc246f12dc864ea0a2207412a8a5522675ea1. 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/GBKPL1789831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4230e0b6cce0a7f0cfa5136147ffe92d35c990f771222505eb5797912dac2fe3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL1789834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd0e2f1939f07be8100179ceda3405775b07b3953853acef380b6c952760e9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM4TX1854755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c0ced62d5f77ea3ff94487d9b94ef6e07565bf7a842e08fb0ee43d9cd909d5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/UKCPJ1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e124b1658f4562a94c56324a8bbe4116586d112b86b82a4d8b016b043333ef8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X2064661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071dba4a578ea2a0632e6df0b6d3f9a72db62f1b362b6623a4fe64d3d7eb09e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282250272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a06451ac19d70dcd7758de2d0bdd632f6f51167b5c73c9e415a0ac310e6af8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR59R2329836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eec9487d6e2a0801c85abe0bc824df98963b5a2c395aa3dc181bb2b09e440b1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6MZ2474466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c30e71cbd21dd63f1455042d9b892219e13ca43faed850f5d8ecf633ee278. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM6P42402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20069d3efb4ee7f7028687d343337c42cf71592528fe3c87a7447ed5cd39001c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMBZ92414866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9deabc7e640bebfc213a48b695e31001a0ec1a684e5da2a5600d3cb902006de. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMBZ92441852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24c135a0b431f12cf7db1bf9abb3e3e73f71ed2ecac2f51468ecbe312cb7d53. 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/QMFME2549539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92757e4225e6193c481a7e194528ecfe69ec5ff80e10dda06d63da5a9136d06e. 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/QMFME2549540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a393508af1f2f42c558b110c952d5498a2797b9ca5c044bb0e4550a58220ede. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMFME2549541.