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 0x0e843d61895d85fd6086d2764ed4bc903bea805263daef3b8c40f38337f1ab24. 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/0e874878-e294-42d3-bcac-bce108299f46.json and https://artists.proofprofile.net/proofs/artist/0e874878-e294-42d3-bcac-bce108299f46.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 0x42e95fc051503378b8c16288ffda270df134ee7309dd20cf3d17611b8924124a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DGA082294695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e39f9d81d278072db86ddf7abd377d4c44e10716031e2eb879c57fe41f5b84. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGY2320368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed48f7c1cb73c0285ef3632c300ced99dc1a9244af046c55776e4c603529b2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIA2458182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed251a43a2310d18d012adf97f07811a88a913c5690dba90751e3c86dd4abecd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAIA2458242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8920e6efb1b2a830d182502d8fbc55ac6d71b477665ed55241ea9038377441b1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAIA2458254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4e2d7fac6fcf2b62990b567cd3e74c84fbbbe08563c600ba3b57a72ec78b2e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:06Z), 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/TCAIA2458296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4009fc6c4aeabb42d1781da51f3d146e1851f449bd39b82a1b258457d3b51c41. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:34:39Z), 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/TCAIM2474729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f0fbf7efcad614b4fb74899491d5d68bb6a2bc62140d813e2ca30a26ee0d67. 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/US7VG2545404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc44e05a67360988c4491ab540819c845e1f7b3cf98016e91271197e21ce4cc7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/RUA7C1923201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7339322c2b24c63f0293b2fac8e6466a2fa9e9fa009a327778f98b5c834b6ed4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RUA1D2510587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b9f5106885a763263c625f7b22e77b949188a5fc684527a2e8877e8db5626. 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/RUA1D2520053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3957c0a4094a58ea915d20dc2293e003c9184baa9a399a1f827048066c7372. 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/RUAGT2535002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f205d57a31a0d1209b2adbb1d21e7a967b0bad5088446c7165c79a359978c20. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:17Z), 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/RUAGT2564723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b848f687c2f17c7afd131c28aea9df5474d03f26fcb863f866d95d8f83642. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUAGT2588230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4707adb7817db24adccfca84c0dc6ecfc1d34d53ebe01dbb65f427a3d10dbe32. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/RUAGT2588253.