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 0x0f0efbc5626f736445f9890a607ff6b05811d346d86f779bbb0f5cbc0dd61e1c. 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/de2fb75d-ec92-4b0d-9b93-0fa097313935.json and https://artists.proofprofile.net/proofs/artist/de2fb75d-ec92-4b0d-9b93-0fa097313935.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 0x7eb204fd4105197017a0cc165534ec9dddba82475581287fefa668420f692fad. 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/QZFZ42510378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa089ab36ad4cc6f155e958245f9e7852c042d83f1ee52b28695251ab4419c303. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFZ42510379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56880544c5893deb50f471e55cc5a5ea49d82c6aedbce61e2be1b226d6a6e33f. 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/QZFZ42510380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc187cb05b22304e1569a6058a6661afbeec77069f324e3753fc60f525a40197. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFZ42510382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7454db428f9c5d25f4d8a820003ebd5163ffdbc030418aa7deb29459bc7a7039. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFZ42510383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46464cbd71626e27e3ef6b2541189e1b50a51040d7fd8e7429d666b236cfe272. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZFZ42510384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae57e71ae57e51e1177163fe793e5d3b579e361d3478cf3e5951b3bd8ad4eeef. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZFZ42510385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5ebf6b61061165c2e32675114930b40df17074922c49e78ed1a3aba75be263. 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/QZFZ42510386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e88ff9459bff04de83ce0e0ae0cebd02a91441ec6c0e045b8d678ae775b50. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFZ42510387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c389b4712532561a17e77e14f01b6bdd8689a9c0028d0effe63eac3a1412d72. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ42510388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c4b94662d2131ae3409e9d8545da56361c852740747b55ac64a48dc1dad7a4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ42510389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67b1034a3e073e74aa17581399081171c3c299904271df8e5bd67b04ca5fbd. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ42510390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb446dd2786bff123623645e602e6af509760f0b4d4d4e9010f9b853e6640f71c. 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/QZFZ42510391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689ddf806be38ddbb8a338b5ff617a442bb38d0b2e1d7e9b722a9daf7e5ed78. 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/QZFZ42510392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792a34e2e71cbc7be799d7bf9202128e8d8a42a520ff4d927612dec6f9ac40a5. 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/QZFZ42510393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2575c01cbb1ebddc5524bdd08e659ceb1ac5d06e381493b78f9f01e58ee3240a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ42510394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd6b2d9ea7381020aef36906956face688fbf7fdd78d47d01d3b32c306285be. 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/QZFZ42510395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912ed8c59d6b2d4a49802b40b73dedfd68e46c1591d517c35d0879b5f8fcc71. 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/QZFZ42510396.