La Maîtrise de Saint Marc - LES CHORISTES
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 0x75708c14117fcc1d5670b907c70a24ad7be6ca04cc2328ca191b4f4292abb732. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30da80fc-5f64-4627-963e-a2c407b420db.json and https://artists.proofprofile.net/proofs/artist/30da80fc-5f64-4627-963e-a2c407b420db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les plus belles chorales d'enfants : Maîtrise de la Basilique de Notre-Dame de Fourvière
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 0xa6c887d03f7f1c6d11ed132f21f4a70ae09c15e5e413f9490d167b8308e18620. 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/FRX880800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d940adbebeb693a996e6f5270da42534843eaf496cda1f870f5df7ee0423b0. 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/FRX880800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7420e486103da69eaf5bffb514c125065948bb4602e2fea7de7e256dc4b799. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:22Z), 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/FRX880800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fef29e095dcdfe601b8f4059b8c39f9c5f527d909af0453e23470a420ec790. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX880500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1cd36c278686f36a21fd3dc3a568a89036cd3a12c5222902c7dc7405a90918. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRX880500037.
Les plus belles chorales d'enfants : Maîtrise de la Basilique de NotreDame de Fourvière
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd55d068f2fcd4a8af14301e29e50eb50e11c688d700e69e5544c29d1e6265. 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/FRZ810611970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0040c32c98d94e88ce8ac88faa321aaa5eff207f1720bdd69e7d2ca30a942df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRZ810611974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601cfa3c46785e5066453854f509abb7027f3963874c152380222e03f44745e8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRZ810611975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76065ef70036aae6ab0e38bc014e5c5e6a3c0811d1f9993e9c83c9fe617136e4. 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/FRX881400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47d13732b5692831bd0877fcbfa41eea275b38be2e5da77f3a3960c1ab69140. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX881300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4118aaee4d4a2a31c0a6d4f2d337bb9eef5f1a0aa788c9c0b2aeb59c748727a8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:12:19Z), 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/FRX882500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb8895d5e3a6fdd609d63ca003d1126eceb22dd86d5248c89b23f0c82b4d87. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX882500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01060db942dd0886a3144d7637e6be9bd23470a9c694a57c243991fb4830c7fc. 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/FRX211009071.
Selva Morale e Spirituale: Mass for 4 Voices, SV 257. Da Capella, Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa42efcd74171af1eeb8558e1bab26b1624443493ddf3feff031e6d4cd772a00. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/FRZDG0500006.
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
Selva Morale e Spirituale: Mass for 4 Voices, SV 257. Da Capella, Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2da4e44dd6acdd1b6947f862349d64fe2f8f54f63788c22631ecf18edaea65. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRZDG0500010.