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 0x744b29ba786c9087ba7a3b77a029bcf4d2c79f095a3033559a97c41fae79ef96. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19662b25-9eaa-48b7-9fb7-ead809200a23.json and https://artists.proofprofile.net/proofs/artist/19662b25-9eaa-48b7-9fb7-ead809200a23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
...Et de Delphine Volange le ciel était toujours sans nouvelles
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 0xc73926e2d62e19d01f609a1ea3c2eb8c892b86fb68f5f39029dc35f8201adc18. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9V01200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc14c0698bbe8976e0b78c765da9f747d5f9e85ed36dd38a5f422a13a258e64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W10903596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e62d686f9f28efa20cc21740aa06d817b7bd70dc13ad618b81a0420ce864e3. 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/FR9V01200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6e944cb4a43d26bc34606b749c83310c3251d9c8e1211fb5682eb4d867e86c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9V01200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd654a37df06f498cf324ba2bb9f08dccd25aedcd326c64aa8e8a56605952941. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9V01200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7590d7b6d3465c11a05a78b960e4876603f8b4546ac8f20e2b6bb483cbbc18c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR9V01200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af136904f0d53599c15be26e28c3cb60407206597e6b925378acd1e1e559e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9V01200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d0552634e6eb0830af3887366fe046a19aa6e1eca439052c3f77d8ee5ea6f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR9V01300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74247becc3df452532731d19214c2adc716b7d2f7e447b812539e639d971bbe. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR9V01300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a07b87e125aa6c558d0b22bf1aa8421d0916f54513450ef77f50dde58675d5a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9V01300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e1cfe33139a919a4122ccbd2af6c8a903995160d1d9b5e5b4815b9a2299ec6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR9V01300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea05924a7ebe7d23090d634ba67cc0a0da377cceb005ca340e607ae275a91fc. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/FR9V01300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96a68ee6a8e9f123afdaf081a7fd8f82c0807fd58a00eab096238057026423. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/FR9V01300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368677f22fab9195ffcb0dce1dce3b8dc3240b99f4fb677a6a05e52ba536ad0c. 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/FR9V01300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da12066f0d8148c2de045b60799e212696e26ab8c7ed4cee60e4957026a89e. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/FR9V00900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd4a3b5f3186d1e60bbaf23bc47a3aa143bafeb084869d942f4c5d27330183c. 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/FR9V01000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6fe53bf8d7d4cac8bc53fb516096482194b07974d55e369236a4ed667af2bb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V80880588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795096568bf8c8dc46ea82b5bb43bb68e0ff7b25ac48170de372730630cb3c71. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR4Q70900056.