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 0xcec90168d4908c987a4f0abe104e28f7733f7887847e500da5dd8d75270c2d38. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06212d49-aed3-4ac4-8344-abd4f512c9b7.json and https://artists.proofprofile.net/proofs/artist/06212d49-aed3-4ac4-8344-abd4f512c9b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Festival en chanson de Petite-Vallée [Tout ça parce que je t'aime (L'année Jim Corcoran)]
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 0xd76ab538d72bc92b28f9824b80db83187d460615370f352626ff039f6dffe184. 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/CAF421000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cf354bd797f858d9b38dd06b15fe3e7d063eb868c9b00ceaffd4c8c44fedf7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAF421000450.
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 0x881ab44db2aac0e1966a174f247a59b3acafb9ea79cec3c3228a95c9b5566e6a. 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/CAJEX1901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60920c362542620fe712fc68f8719b3132d08ee7746a321434f377bbe41443d3. 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/CAUM81800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29ac4078fe667733c197549b71129a0b934cdb62d8aac993c13bc79b81423bf. 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/CAUM81800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd5df3f6b735a3e3a63ce18013cfd4b7f4adceaacb8b25b811eb042bf6a5f4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAUM81800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632795fbcc000ba472db6a6ac92770cbce22dbaa9db850f1fdb1713c9163d8d. 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/CAUM81800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916f981ee901232b1d2ca96ee47e4535cab7dd8d1679b99277df396f81e11395. 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/CAUM81800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7396cf9d7c6fbbfa4509c23ad8ed5cd89fb4602a1f83b4dc88282e61e8f4e. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/CAUM81800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1b238f8851dec51ab9e6e334eed89f125fcc1724873dd7adfabc3549f524c. 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/CAUM81800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f9172b1145e7c307e7bb00b32ca5ded9aec8526b75c6c91154896a38c3bdc. 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/CAUM81800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945dd70ee01f73c34e8fe877f90a9cbd6cc3626a0c8bc011623b7c1af62fa0d2. 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/CAUM81800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6511fb7be44c20174b56b32a4eb39bd7ab2fb9d2f6bb37419d012b65d33272. 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/CAUM81800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab64f95bfdb6d0e06fcb5dfe6fb4da097292dbe5a2ffe6ec010d2630986147ad. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA3HQ2023001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30283f82e7ca51979c0b621f9be70420fee91325fe949667c6a05953ad280c5e. 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/CA3HQ2023008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dd218c23d685ae347f39d549d4a3c58f8c30c773032729291a7bd8a2c5dfd0. 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/CA3HQ2023005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f0d26200c878006344df6c37d1a26b02d349d17fc6de479af06131aae379b5. 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/CA3HQ2023006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b435799c20c633d4b80cda6dea4e1061803d6bbfecb0c27c02c978e7420657. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA3HQ2023004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f8cf69cadaacf8cefe74b6525bd8abf65aa526f1e13e2c89e941d87bb286f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA3HQ2023010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413cd097e207207b4e85cf482849fca9f9ee3e239c70180ff447cb9227b265cc. 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/CA3HQ2023007.
Festival en chanson de Petite-Vallée [J'ai l'goût de désobéir (L'année Pierre Flynn)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580e4d899b44f631df800794169aabfd1e1a2ff1fc711388cf075b4dc9d0dead. 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/CAV700791004.
Festival en chanson de Petite-Vallée : 30 ans vol. 2