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 0x6e40ff5c9164d4048794ad75bcb4a179447bec80ae17917e542a9f0574d97681. 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/f474a528-d9d7-4f5e-a559-00e7ea14f06c.json and https://artists.proofprofile.net/proofs/artist/f474a528-d9d7-4f5e-a559-00e7ea14f06c.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 0x25af9f4291545f868a01c47701c9b2b40a1fde96172ad31b45289527755089e7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFZ32089675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de99f5d4a010bc4b62773cf9f183f1fdb192f8db894935f3c927c4cf9e114f. 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/QZFZ42003594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b8c819a9eb4addc60a2483d3820351db1a4b49dd02f699576d945803204c04. 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/QZFZ52026039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc02f00419bb1bb117c5acd9017eabce393f92264604b39ad6ea3eaa3af25c54. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ62096976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903fbbb897136e7986cdc6df97f683621f4dbb44c5f28702e0100edd28383d3e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZDA52039020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d5b50feb0fec82932b723e866e11b2c67607c7285fd7a25e6695b84648ef55. 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/QZDA72090879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac5106d2e5c22ec82f99ae058e862aa42820e07a1d57312daac3db4f7e0f43. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN32035817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e495e27c513c6e989d44a624e2e9b117b1908573d9adaeaf23f75fe8ae4793. 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/QZHNB2028835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbe4b9a7f81f1e1593652938bde05a71a4b83a8345a130902e39113136bebfe. 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/QZK6N2053172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694da34060b1f4e5398a5d188245adde62b84fe24df334de3515f35c654971d4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZK6G2077607.
Por Si Nunca Nos Volvemos a Ver (Remake)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf19dd3acb6906c3c1bb024c5eda2fe4939b966e9b09d14d6eb481dc8a7b0b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN82554871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc35506558df0ff8c4eb8de2aa68e37af579099e74fc897ce6328175f4b290a. 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/QZHNB2523386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9bc1dbc429d5900bb593b014082d36b73b0d235ce5d83b81e4f742b29c5dbe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2595621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13691bb3359a6ba0766f1933d12670618e967d6d1fd5cac1215bb8c285d871f7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZK6J2547427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa34b6d23308076277f302954ba6c8a75633c7510308be78b88e5b34e132b0b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6F2579431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2116050ed032626bb41970b17a21621f95c73d77ef1112034906a5e375f67af. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZMER2591634.