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 0x5bf8122f743a467fd86147ab1047f96c9b7d7d8ec6d118b4eedf58f3e51f5235. 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/3a806b8a-0d7f-4a68-915b-a6f4a9038b22.json and https://artists.proofprofile.net/proofs/artist/3a806b8a-0d7f-4a68-915b-a6f4a9038b22.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 0x3dd98484c5bc231d3231919d9ac4853b36699f3b9eb061d4e5d652b1a1ef41ca. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:12Z), 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/FR2W11000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32511a53285b943660b2edd21a80eb4ed602a00336e443c6935de813ce0de7f0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:48:01Z), 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/FR2W11000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d43272e66048add9c947f8af11147eb4b4095004ed15306d062fdbb1d634bb. 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/FR2W11000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ecfd2f1a5a6c35d82b341b96614d0708456702e40f205ba085569f3134142. 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/FR2W11000028.
Une goutte de miel dans unlitre de plomb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d571cc8656dc2af38dc5638cb8607a161bfe6b889adc640b6942566de5dd49. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2W10500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac536fbefa8e6dca0d0472c89009316b5521964206e5b6f28fec7147851f795f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR2W10500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c83ad620b0938f5b5f4b250efbb155b0eb5ee3368e66bd6a8acf12ee7d4bf10. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2W10500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26e8024194c3d18e19b4e462477ab45f1b486646c0a2caf8ea6bcbaa7a3f83c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR2W11400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5160a79d817a8a21b1b7cb725d64540303bf60025786c6315ed0335a147ab49. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FR2W11400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9129af933f45389d50d35df9c150f1b5951bd5ca1ccefb8209b12e6d306b867b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2W11400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652f914ac31515cfd6d946d651039a65c8fb4c372b1f10a85fa1b49c5a2f7526. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FR2W11400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ee0a12a5f594e05bdc67bb02cf04c614e44c57dd69a037f266ab3432a2a75d. 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/FR2W11700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25042a8f32d63fe2e72d7004bae41787cd1ac7a2f4189ac04ba5ebb66c013b3b. 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/FR2W11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078c0b007a7063fb14358e488396ba0cab9b39a315e2a7679af904a389bb677c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR2W11700006.
Parler aux inconnus (feat. Lucio Bukowski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e408e748abb11f1806cd514fb97fc50e770f6b52e5d0574f35c16981df796a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2W11700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6275451cecf0794d4d407af1162084671e7c1a92840f93059d0c080f89c33da4. 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/FR2W11700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583696560f0291f0d292d40016a227d7dcf1d3a5f9a5100c40a6db6ccfef791b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2W11700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9fb9774c49ea2ca9d5a564fc897a25d4887a4dd44825e8862991f40e7b0ca. 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/FR2W11700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8dd2cf05174ef7cf7a4ec23afba8b3819b128ab7ae6a2830edf83a3e9cfb2b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR2W11700001.
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 0xf2c414118eaa2cd1edbf2d507a7acc01eb2b81183e841a59d92eaf27a56b3c88. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR2W11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fe26283e9ee0c3468107b4482c281146c2c97edd923a043053c1bd8ecec08d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR2W11700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c027f837e0fafc666c83d894db097b757f54598629f50f2e10e9a224c317de. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR2W11700011.