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 0x96e3744f5d54d6d03f29a129951df2425e43c2536a2c7cd359790255e6aecea9. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4782b1b-453c-4d77-b474-2afc2b2dde81.json and https://artists.proofprofile.net/proofs/artist/b4782b1b-453c-4d77-b474-2afc2b2dde81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nelligan, Le Vaisseau d'or, André Gagnon
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 0x11dbee84c5a752dbf8d572173d4b34db978d77cc7e688b77efce993930d827d6. 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/CA2NB2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44121d80b5a27a4e4e722e96eebedc6e07fe2245cfa681000f777d69d80e71b. 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/CA2NB2200005.
Gianni Schicchi, O mio babbino caro, Giacomo Puccini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b0fc0cba6ec8c5c9dbe7714e81190b183246c15629406cadbb71e9e1787829. 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/CA2NB2200008.
Tannhäuser, O du, mein holder Abendstern, Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a038026a1275a71881602d441fc3fc37a5386a30adc5a992d55fd5cabf5f97d. 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/CA2NB2200011.
Eugene Onegin, Air du Prince Gremin, Piotr Ilitch Tchaikovski
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc6ff81b183eaa46010b484f2ec0bf02d25ff6050e1694d7ba719771f74c6c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CA2NB2200001.
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
Trois mélodies Op.7 No.1, Après un rêve, Gabriel Fauré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4123f7f833f74ee5d17fa6201b2bc14c44f7587b49f68bdb74ee78cd87cf6c. 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/CA2NB2200003.
7 Variations sur Bei Männern, welche Liebe fühlen, Ludwig van Beethoven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e04597d53fb39c75cdf82c856c5cd92eaf2a8a38d9c451a29f7837247488e0. 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/CA2NB2200004.
Die Zauberflöte, Air de La reine de la nuit, Wolfgang Amadeus Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07698f292e53484fce1f260cca25055ae33f19486864d32ca8361fdd3a15be1b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CA2NB2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39ac38ba02891f7e56f760d068b22bdab388aba1e0460b2ecd10b8a28e5df9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA2NB2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a537e4b6f3a0e7445e47f85d05c05883613840b3cde4ead52618b845c5f958. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CA2NB2200009.
L'elisir d'amore, Una furtiva lagrima, Gaetano Donizetti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad41200fa2a2ea9b045deb1a2bc244148a053c1aedee4e6cfacd9cce89b7a13. 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/CA2NB2200010.