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 0xbe2440820ce060151ce882a5bab33e1ee5897f94e4b4c018e6d4715eea372310. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e78ba315-ee6d-40e0-8300-92bbf11bbe95.json and https://artists.proofprofile.net/proofs/artist/e78ba315-ee6d-40e0-8300-92bbf11bbe95.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 0x4015cf8c230af72810bb2360c72607610a8d78fcda5597dbff5293d8a9c3366f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ731900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ec6d243c6fa3923efca8c97686e5805952fcd021ec65346332d8503eaddbd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12031411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b6119ba840a1941d6571bfc35a997d9ad6c3a2e3bf330804d52bc2a144d7e5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR9W12031406.
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 0x60c68cc75db7a275ad4b0d0e5444efe2e37af08cbf401374b78767d93bada69a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR9W12031407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7184b3e0e4bcc08bd277182f08420feec259faef68078db22ecfac9dd912ba9c. 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/FR9W11933474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658b2ab5f83b1a2f38bc5982696dc53a1b1763c71e2e73baceaae29f353d953. 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/FR9W11933480.
Tribus Delectus (feat. Olivier Thémines)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03752f212cb94c7719d96cca7fa14c9acc19662a646dc931622abf7f3687147. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FXQ262500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77807f6f600bf2422abbc494a45dcdcd797047a903c1f783926c42d563a4b9fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FXQ262500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a37c2afb07f4e70134e4abb55e218020e9ab9f0db0ad11ad862c8228abbd3d. 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/FXQ262500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e36a262cb9a9cb38f4468c1be8f192ee87d7c5e99e446f32b083ea27065b9df. 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/FXQ262500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81ac21ffb604bbf832bba56379f4f87c8e2751ca099eab8a4d0e05db991bac7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FXQ262500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5becb94a23f757c98f22608bc1743a7dba6f190065e1fab3e28bd7b6f7fa5. 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/FXQ262500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d87778142e210c9bbf49b66bee5441b61ba8422030f3ecb1bd81ce715c954cf. 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/FXQ262500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5af357b19e402330c7a9fad00bec1feb17250b509b5048eac37dd5fcce788f. 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/FR33O1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4853b5ffa352f3d8e7c218999ad8c49a38e977c1089956fe4fc7116a96d7be57. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR33O1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4b34f3dee16ec9a749cbdfe0f865a6bc6d21a607b6c95d57ecfac2ab3c563. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR33O1900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4602f435c2032356f1c77e352d1e2ff72db25de52d9bc39a4870502cac4ab8ef. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR33O1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22989204ca1f2cf3134d2af0894e328748b7ee5f38a72c2ec83894bd8dae6a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR33O1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9ea932040a1166af7ae5fcc70b2c13264ef48cbd6bd60aebebb8bbbcd6ab5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR33O1900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1772678144fdfb81b91f562ae4601a26861232bbe53ac300a8df70c0288c51. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR33O1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9cd6c490371a9d66f4a4e7590c164b619f222b5f83e1965e7ce2f94dbc11e4. 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/FR9W12450405.