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 0x14351e2a3275900a531a8be480f78e3604370811eea86ff627d609177ecfbd99. 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/861ec8f0-6a2a-45f0-bb6b-5b9948da80ce.json and https://artists.proofprofile.net/proofs/artist/861ec8f0-6a2a-45f0-bb6b-5b9948da80ce.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 0x12654e16c5d9be06ee6b088daea74f70b13c58685e52e67bd682f56097a090cc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ART721610846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f22c17aeca472ce2fdbdc803c0a7e1dfe57449433fdffe68a05f17254645fc. 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/ART721610847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7504565372dfa0134dc1fa5fe12159cf1ef4767cb6af8f3aacafa0b6cd398c30. 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/ART721610855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf090dbbfbf575adedaa1a100e9c8e70561269b130f157a9d6b4d1056cb413234. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:53Z), 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/ART721510792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eca0076697c56222a75fee292f9279f28dd163a7ad659b8ce81a611b69eeb99. 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/ART721310722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8692b9a3044eae9afa37ca40095a8d987be5d965ae98c7006707a728e6bc138e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ART721310725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7de8e8e243c3cc85b6983c37d8bdb12681a138dfaf790c9113ce437c7589f3a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARA590801992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5753911bde699a7863ec8343b4c8c800d36d0d4eaca4943b9ea95ed7d18cdbb1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARA590801995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd5b801b82d5a4788daf2dec4bb611065dcc0ec4843d5cd416aaf869740f9b. 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/ARA590801999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73a7c30482f762bcf9ff88623768a26f0ffb7a89f7e89d5e6b1b4b95374718. 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/ARA590802000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9489f09ff7982f46e192a88d54b83bdaca89e5bc78a21b45983164bbcb71fe6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG601012137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88758cc1fcf24460fffbe65845c40c9c91921363672ea36d56cd42f36a153da0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:39:58Z), 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/ARG601012145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3db3e30d0ea50d8f5b7d246583ba7e23a3d60905d9ac1b6ae56ffbf86873a98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG601012106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe163482776bc21e9a1576236d31944bc96e61c49a010c6f39685e7cd1e2ea84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG601012109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e500d0caff09bd08f53d55cabe20f679d997d6e8789d6a55171344ac2135db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG601012113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acb51f40f11b2598326ac65e9238d2641baca143157c3c711a948607ef78fed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARG601012118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24573fd72fa2d2f3c2a67b10feb325e9e652f94ece9e81a2152901eaac63bfa4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARA590700424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1930adb3cbd7488655b49036af45696507d9d32d8a9ea062a694e017faac7faa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARA590700425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae6892daaf896de6e2bff6498f2d8ad6ab5e722b179833e0883608a2b9ccaf. 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/ARA590700437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ae941073c6cc3ce3c149e7459384d13756b2b760a6c2091c5d40b0668bc7c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARX459600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173170f746320951bd24e1a55c81332a4bb3610875b09331fb29bde441cc5e1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARX459600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb61529f876388a6b9c26d96282aece5092a52df509d6980d32a7b56689d72. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARX459600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ca496f3de4eaed9512b3c2854f4ffc078b3f26bb39ae924a90e84c52fac686. 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/ARG601400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc48d3a2e13e2c6015d17d53c80d1c2c7f3714c4555a136ea79e5b2d1d69b4. 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/ARG601700039.