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 0x33622171aa57b1af82f3962a61a19aa98f2b977008fed71e6fe1dba25693ef0d. 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/c2a4dd73-0373-4994-a811-a20e8a892eb2.json and https://artists.proofprofile.net/proofs/artist/c2a4dd73-0373-4994-a811-a20e8a892eb2.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 0x764ce225a620e443d0031579ba0f640a948317056103aa5d6d4b7324de2a5dcc. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/FR8GV1716150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf2bf309d99912452ea308b33da11fc33f4b2772f81792a03a8d477b524f04. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/FRZ019900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611116467602563dbf928e003255ce0ee461c58ba30c373cbaedabfa53327cb7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRZ019900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffc9f8795c1d0ee388af4faf734a043d9f02c5a4ead7453aea2f6f82baad19. 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/FRZ019900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b75368f8337e48f545fa0b919f4b272b982611cef6ee7870aabfc99f47a7a. 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/FRZ019900580.
La Mort N'Est Qu'Une Etape (Le Testament)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca37eb43617bbe58b0c17ff5206287fd8e06f1350e9ccfa9ac817fc64bc1064e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ019900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7def535b2d2638407552dc4c2b9d90ba682443dae27d93f569dee718326667f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR8GV1720820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fa0a33599a4485661390bcc4ef1bc12c1bf4d4fb4a8246ebff93f452cd409. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR8GV1720830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fa0a33599a4485661390bcc4ef1bc12c1bf4d4fb4a8246ebff93f452cd409. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR8GV1720830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902241a299f04f98b91d77d63234addb475b0601bc56bf6eee633812a15f1c6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR8GV1818500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf452c8dc309c80904766969f1d2d75bcb4ba0e76b5bee1dc012b2aceebb91e0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR8GV1716140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a189491086c58ac9af0a1f3c5f111c66091d248b8861cebe220408e50c28c5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR8GV1720750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2f0697b20cb3c584aac7f43b5bba2a98bcd5031246764b14fb67e6f2c815f0. 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/FR0U91400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1af1d9fae86c778c23e1fa483182604517659874b2b0dcdc4bcccb631e9e014. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR6V80258150.