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 0xe509e32651aa500bce1f3a16c0273259a8eca33d8d3bfce2233d81fd80e51a89. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a6d6897-6156-4b14-85a9-f43e368aabfa.json and https://artists.proofprofile.net/proofs/artist/5a6d6897-6156-4b14-85a9-f43e368aabfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Musiciens de Provence : Musique des trouvères et des troubadours
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 0xe481f572a499310309345a871fbbe5f089eb6a89c73a74a67dbf2f0123766b72. 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/FRZ177500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb242c5e6d7a1057b3feb40905aead2d8edc9ef3f5d320efa4ba3304ae87bca. 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/FRZ177500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c2b53e8106fc47946c2423d4e9fa9a6ac7826d307c4eb32ed22e6a675d6a1. 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/FRZ177500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4914473884d861ac10de659da44d85357ba10fe3c60ae79e04df4c3db2f1bfb. 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/FRZ177800520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d81d3c77f226240c01a6d45956d761c2800712cf3d7cb1656753899594c8d8. 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/FRZ177400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2bed5544b22deac35ee958dfdab9de3115ff293f87eb7c7dceafe0a9cb979. 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/FRZ177400490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6775aab167fbc5ce00fbfb99d80fbfe3de4254178af6a75f0d0ce11e09b6a08. 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/FRZ177400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646de3261eb6ccff7efc4c199e04bab1af5f0ff5cd60956b45bb237e0057553c. 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/FRZ177700820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089c24bc2f132e3ed7ff41dd502bedc6c48463362acb791b531ea481de7a2533. 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/FRZ177300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff459662b8e2e004b1cf317958bb6b93855ea09bc455e93e142b8fa07d74ff. 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/FRZ177700900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb486dbbf95263898ab743b38e1056d90ef090224cb95a29ab2015b3c43f098. 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/FRZ178102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f59c6ed501026ff494b84e9d985a5f24b31a555250909ff0633fc7c7b65b0b5. 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/FRZ177300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26edfd71646acc1dc2db1ecea16d761009bc0d3da2d834e0233f583611ec5aa. 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/FRZ177300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07941d4e5aad692bf94cf206d330c2b5e19a1afde3c6d3238cc9aa9da7d8b246. 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/FRZ177300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d08604496646e497a3ef031ed71e4cb820bab743622c29d184027701d7ecf2. 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/FRZ177500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c34e24ade9f74b584c00d085e989df33bae2c9d22b9654eae60a76ec7e101. 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/FRZ177400580.
Alphonse X le Sage : Cantigas de Santa Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f30fbb2e5529ee903db435e20819190da92cd329bf52b142cf7b91d1302600. 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/FRZ680700001.
Cantiga 119: Como somos per conssello do démo perdudos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84312c6680f53cbd12ce2064a12428dd575a4829f9e1c0124df2500c494f1ab. 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/FRZ680700003.
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
Cantiga 123: De Santa María sinal qual xe quér
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe55a77921a6ea5b4d4f329c63483e89a884437ac3a27e0ac852b3890b8ebc9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ680700004.
Cantiga 38: Pois que Déus quis da Virgen fillo seer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a13ff3fcc01776770179855c8dbd000d27deefa6e6e45c468c3dad8ccd3422. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ680700005.
Cantiga 308: De todo mal pód' a Virgen a quena ama sãar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7006286065715158fbda7881f593c38083e5bd207a6e68c68371e283c09c1edb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRZ680700006.
Cantiga 186: Quen na Virgen santa muito fïará
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ce711866eb0f05da3924dd2797be20b83daa353004c44d8e466f5e290a341. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRZ680700007.
Cantiga 76: Quenas sas figuras da Virgen partir quér
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92417cd97936a5ac1f320d387cdeab548c6319c70a68cb20c34be678370022. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/FRZ680700009.
Cantiga 292: Muito demóstra a Virgen, a Sennor esperital, sa lealdade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33948694a3b722305781ab371f105f86c97a4cc65af00fa98bfefd54d84ee444. 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/FRZ680700010.
Cantiga 79: Ai, Santa María, quen se per vós guía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15baef6825e9b388e657987ad24ea68e5b667da0cf458d7fa75a999c2b5e282a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ680700011.
Cantiga 159: Non sofre Santa María de seeren perdidosos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7f04deee8920c9a70de922099c95be87bc3f5179b9c07ded8fef811f2ab43. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ680700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23bbc48f9a79072f6aefd8ba008b25e8894e75917c0a5c1b8bd8e27884950f. 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/FRZDG2101477.
Chansons des rois & des princes du moyen-âge
Seigneur, sachiez qui ore ne s'en ira (Chanson de croisade)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b9891f665dd3b0862796fa7ee44430b0675c9c35d2ed549f7f22cde0e4527. 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/FRZ178700230.
Chansons et danses de la renaissance française
Chansons et danses au temps des cathédrales : La fête sur le parvis de Notre-Dame