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 0x55b61ef26159633b84245e9e87e500c8d3370008e98a1cfedd9d8bdc0c8350e6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ca40e7-8216-42ef-9c73-1bc49bd46395.json and https://artists.proofprofile.net/proofs/artist/d1ca40e7-8216-42ef-9c73-1bc49bd46395.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6af7f746b68b7611944ddb0bb3412781fd074da8ba42f9a24f9ae806378dbb6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:46:11Z), 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/GBMJG2308997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd565bef54aa37391f2f2afe9039e9e8c6026ad333ff40d37136ac2f96abb3c6. 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/GBMJG2308999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781dfa7110211c17636c55adeafea53663646d3e35c40b62749e4acac25c159. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMJG2309000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a655d0a90f89bcfee8ca4cd982960e444490cbe0cff8946c054f589688e4c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES7731114001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d2a964bb5ae57d22f1a2ee1ef89b84c0c799cc4f0079cb77fcd6ddf484d36. 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/ES7731114004.
Tiempo (feat. Toño Jiménez & Israel Amador)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1a735d3d9b02c887d534bf45500629e1ab9b3c3f2aafc615a7896ed043830. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:18Z), 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/TCACE1580878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d3e70a0c34e41980f263ae2e413c3ac1621503439c78a6104ed5cb1c446cc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBMJG1721446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c68d9eb7c806f3dbe9575fb9b15117f914272a7b6f36af4d0198c0a89efaf. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:19Z), 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/GBMJG2307440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ab8fc1a3c60b31066d6d4153ed5fec27005e8490308415f81b09f15d41a65. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA092335802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bb8c0d64437f14f37469c6dc86da9e57dd44a2a4663cd6ced137260d82b99c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES88A1707503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e6ef0d673cce987042e7f63cd3d3a559a4f310d8f5449659a6b6a98374e42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES7731402119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafa2762436668c6ee841cfa911b5439cc702c576b3cf7d1861f01b43400bf8. 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/DEYX82244688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cf6d1a2bba5f9d2e6899b19a31a41b21eb0923f81ada914eefc301071d27b7. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZTB42451389.
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