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 0x8d9569fb4174b78f666bf545d73dd02450710d4dac92230717a643c9ccbebd23. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/093f09f6-f6e5-4b30-9752-87425953d358.json and https://artists.proofprofile.net/proofs/artist/093f09f6-f6e5-4b30-9752-87425953d358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zarzuela: Preludios - Danzas - Intermedios
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 0xea0e66f65e4544a1934b3870fbdfb7fe4e4f1d351d4f93a516c799bedebb77ca. 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/ESAAI0202688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310398963a6ff7be1b50e4f885f59c32483a8d3e5865e9d0a9851b6cebb99917. 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/ESAAI0202695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a3f2f3c717d225ba39325db967ddd69b90c6dcb08199948ef3670b926d8897. 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/ESAAI0202697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c8df7e5bf4b36b31a5f2615cbb0034d2d4569199b8ece71e4b8ad513c3d44. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ESAAI0202703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6beed23be57ad8b50947f9ca2a75f86338f150ccd846f97051327d74f71436. 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/ESAAI0202706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a9093f8e2485b4ed1751c4ca11be6ea665c57c5968812e750a2647b3228026. 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/ESAAI0202709.
Los cadetes de la reina: Minueto - Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63434bf9a5772e76e2cb14300b3b2c15a33c2bb0b172252328ed2e3a15dd6e8e. 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/ESAAI0202711.
Orquesta Sinfonica de la Radio Television Espanola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430334b00a732e18c6a5925fbd232df56720260577d8a039be9d66c3feffa2f7. 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/ES17B1000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a450de44d3a3a8b9d0e2b3a0f2f64b46441a796416811c4e6561a75c180c9e. 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/ES17B1000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c74851246727e260bcbb8d062ad073fbaac3299215f1e5c2093f823935ef8bf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:58Z), 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/ESAAI0202708.
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
El mundo comedia es, o El baile de Luis Alonso: Intermedio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f54a077c7f42d1eaa1009a36f55162639aae2cc63ea70542ef17a0e1dc443c9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ESAAI0202690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71127f70072f067148f4f9749d2cc736d323d8fc77a22c0c679dfff4b1c5fe06. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESAAI0202693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f78d4d776d9dc94b27d281b7bc5cff1a9b3badc6b7eebc04df0cd6726b29b6. 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/ESAAI0202696.
El mundo comedia es, o El baile de Luis Alonso: Polca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28e7cd7903f691f0fd5c9f55e1b0ac27cbfce7bdf2192bf59567434813cec5b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ESAAI0202699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69661925b95323950843541897dccdcf3a49da542ce8e23d94df4639e7f7c131. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ESAAI0202701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a06a6fa72361e6fda512643b6e623c0d55ea95b2b0074178858d7e75c53e4. 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/ESAAI0202705.
La boda de Luis Alonso, o La noche del encierro: Boleras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c774e3107eb6514be8700d558e4b0ca667e8aca489130c2a554fc7923a1b13f. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ESAAI0202710.
La boda de Luis Alonso, o La noche del encierro: Intermedio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f08983690029c102d267831ddf4819d4fb4c97447e8c2ca2aee1659b3566b1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ESAAI0202712.