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 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 0x78a6dd6ef71e9e5bf4595ce0b9bfbee28e8475a3de684d4d1f619ffc8adc1649. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f109e14-6254-4d79-911e-16e257111ad0.json and https://artists.proofprofile.net/proofs/artist/6f109e14-6254-4d79-911e-16e257111ad0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x14b9c38e47aa40a285bf4569cd1b90465b688c8c1c9c6d66de4bdcab83e164a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5AB1954829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40608d23e6058fb2f20c13bd942d3ffa5812fd86a5fb40899e227a4f07c8af. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB1954833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3af16011d141d2f788eb5b4eda85dfe9fe45b19206fa061e80bad56841950d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5AB1960647.
Lo Que Recordaremos del Mundial de Rusia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d8e2ce05e33561fca00028eab48ea645e3eaafadc8fb4c36c342a79080877f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ5AB2035811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2aab92caa857a752ffc9eded48da26b4aa42bf7284127b5fa8ccf60161a2b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ5AB2035812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94618c3435404c3b3c2a1b944941f85102def33e75dd8a8895d8f9f572f9c4a8. 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/QZ5AB2035813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae38652abf52b6028577f88a3f70a109c67dd090d7d01d4ee1e917816bf2677. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ5AB2035815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3479b1c1b55071e20a5e420fbcd8bd7373c44e8d20328221a3eefdf28e9bbc2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5AB2035816.
Que Pena Con Don Wolverine y los Otros Famosos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4595f222827aac018fc180fe68b2c304914978992b55b173ee2db69c403e42. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZ5AB2064699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96120d79f7b3eaa0c4544506d27d8d84c88e4b7738b9058043a0f0bcb8793891. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZ5AB2064700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d727fa50f99a7175f145f049136e6dfa793fdadd11e31feaf823449dc70285. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5AB2064701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed0adde489f1c02153942b63113f188541e7ef447803f1624b79b4886a9232. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZ5AB2064702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a100fc9d4948b6fa023599db4f36fe9a19da48c9178c9d93cc12b9940352f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZ5AB2064703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c7ce7a67367acf3ab599dcfe9738756de3056de91cd193639d76fac90db02b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZ5AB2064704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79db823a897d0bbd96446a730e9383e0a664a588e9caa9df3169e67feb91f1e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZ5AB2064705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30781d9758410fae63498e1cb2863ee8990e74db48334d2c71ad77081530763c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZ5AB2064708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a096522ad459a40bc54f2fe8db236037b2e02acfcfbf5dcbf1a775ca381b400. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5AB2064709.
Celebrando Amor y Amistad Sin Fallar en el Intento