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 0xe2b4848ff41ea501c4cb24be66b6f3bf4186286dd984e921c393f12ed789af84. 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/e01b91db-24d6-48b6-9ba2-949ecaacaefb.json and https://artists.proofprofile.net/proofs/artist/e01b91db-24d6-48b6-9ba2-949ecaacaefb.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 0xe19d7806589ffc31ed1b49d8f4a2518ba55c462849944c4c9b4d0a594e617a66. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:17:44Z), 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/QZDA62125120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd4cdfc5ba2adcf3dbbedf74762f25be0489cd5cd82185c7e497a463d86c32. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:05Z), 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/QZDA62125122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33b11ad9a1098427767372914a0028977045e2002f4a31b6b8aef422d047f16. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:05Z), 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/QZDA62125123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37e6df71c1d1ffe1ffb4d5b265cdbe5cbe5433d99a925e544ee430d39b82fd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA62125124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2d6f98d721eedaa2325ca7836e79c26402c866db247d1c2e8c9468fb78ac7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:26Z), 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/QZDA62125127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bf366e6468c4de37ac5982c4f583e52cb1b76090514286d18b7ada1260db3e. 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/QZDA62125128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80693a0bef8c6c90db7b039f595bfcb7039271a1646fdb5af0d345cbbdab3225. 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/QZHN92142429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c12707396b0d951bf930598bd9988d80d0e84c4493d0d7e6ae4ea5aed57dd93. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6P2178721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58f408d7957eeda44c8fdba484e6f152fccecfda47e6cb79a2fdf05df4127c1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWR2199530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905ae145f24339bc6ca8d4b2ad3b2b562e429c19dcc3dce003c85f09dd4227a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZPLR2147645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6b3741e80b495eebde91b5bddd79c303c8888a04088e82a55e22e1ab4097d0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6Q2260859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25113708340f2e56eeaa24838615e293a57b042dd40a3bc09eb6fd8ae6dd7eaa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2315909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343815843e96d9d50cf815f8b2037345ad06d7f3cb0bd8e6d3cd60853f4a8934. 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/QZK6F2315913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181c1f0a87c33104f3734d72046b3ae01d5b2634fc1cd27ba9e7b725ca38cb0f. 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/QZK6F2315915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572747ef06d74b5ec124ba29b11c56494523664e21b9407cd1fdb27eb19f578. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:36:23Z), 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/QZK6F2315916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91164daf07a5cdaebcbc8d629b437878fdb445a89e655d9a6afdbb55d006e16f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZK6F2315917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86ccc3aba381a44dcbfbea6a123c3b6b41535255444959aa8326b128215f1ad. 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/QZK6F2315918.