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 0x5a7a3532d5dc27773a9c8e867f925f40c1122b0da038c442c8cfc43e39298b01. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/001a02f0-c42b-4a30-b3d7-346e02f89683.json and https://artists.proofprofile.net/proofs/artist/001a02f0-c42b-4a30-b3d7-346e02f89683.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 0xbad7fd10fc79327ab564c39255fec5656950e1013b3c57ff072dd470c69c3685. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARHXW2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd522c18876d8c9175ae32503baf21b8d56752f1082b62b95a74286e22a2bf0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARHXW2300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f980c4b5bb69a6f2f2ac5cb695b660de2a09ddc37cb7ea22d9814f75601be1c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:00Z), 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/ARHXW2300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b071ecd5d8802a5ff5af07f6f5826280c41392b2c13209ea6a6681cf2be509. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ARHXW2300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7b92dbb05f88a98f10707ac5a88ce43e5270b7ea3845c3ce9f8eb8542b98ed. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARHXW2300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd6ff36db4d9ad767c66552fe2a87fccdd3b66fb2a3593d55f398f38a9a087. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARHXW2300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c916e3ad14735a9c2b0440fc3d9bf7c466a9ade524720106e8a1f559174cfd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARHXW2300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd49268483ae063b2538174eac71597f27e47ac473ffed6864c20d9c2c9360e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARHXW2300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a01508603a06daa09948e614704f557911b8a46a7d6a1915d16256944e089. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ARHXW2300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25a78cd7ebf35ed120494f79117de59856013bc111757af8d66ab4a1bdd6a7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ARHXW2300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c11a84da3cd4c311879897875530bb5aaf4e942eb60577f07fa50036813640. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARHXW2300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e70157051a73ffd2abb5766c0161148c658dc2e1a370b559db0e369858b63. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:52:57Z), 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/ARHXW2300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfdf80bf5465e57e8337faf6a9f8c0a2cd22d4f9d261a632670c81e3d6519a6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ARHXW2300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7ca131eef1490bd83cfd0acf80adeaff45ce805633a79e9244833e94b2f541. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARHXW2300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad9ef58e4a5ddd8d76f32e61808c205ec7eb57a5e9caf6011046a3b8904d48. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/AR15Y2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f460fe755e0ab7dcc7a785251d5d08a4d457432f5c7046d2fe3f8be35de1c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ARHXW2300359.
Tomaré para Olvidar (En Vivo en el Teatro Opera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee77b7624d25161bdfb01abb6bf29b7580825fdaa9d24c48bad1f575720ab30. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ARHXW2303429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0d35d54ee6e7dac15b016041dc20229671dc432ed55e9ccfd0c87bdd1f1fb. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ARHXW2303430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f3ed9e3abd809b1bf0fa404137c660a96f538b512ca8c2a84fe112f90291a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARSST2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c75b40bf98864cf07e635139680807f8beabfdf66de6f67e702b26f0ece278d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF842300052.