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 0x0bb75efe9c580d407858cc915b21225c5a31b39ea8990c227247d20acbd74a36. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f69157cc-f7ed-4da5-aa92-5bf5f5434d62.json and https://artists.proofprofile.net/proofs/artist/f69157cc-f7ed-4da5-aa92-5bf5f5434d62.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 0x17947978ceb4c353a3babcf2d1b6746c14f9115b9f1d3f2a6ea4e5df1363e577. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZGWX2134368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15abe54d408a57ae75f4a2c670e3caa3e863388ec5f63cf54e2a7b18c44f8b1a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB72228047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda7515bf246ed7f097549d916a2ee0a19ed6a8bc1e8f1ccdcc1a473d41d5e8d. 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/QZTBB2248417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de943b7ca5b5ba97356923aeaa6e5d6b1def9007b7f12d44d1fe577939c0741. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ62326564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ec338e409ef340c506f32b4e9f0d5f9a48e81ec6622c1121ee07fe48b3c6c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92379065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd387a3c68e661381ffb26f6aab8432bd36a30b226d5792e0c13628022ced385. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN52302539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86361b9aa9462e5c715224a9bc9c3a55d20362e3de3f451cd1d5f12806831a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAZ2314845.
Comodi (La Società Degli Algoritmi) [Radio Edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62d7d68a9975e166742eb4f18e338d0d80450d7b3422bd3ea553d466e92ec5a. 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/QZK6H2314145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec17ba73b72bd6d7708d634be2df414ab3dbe754eb0f0a14f5de49a7283ca5. 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/QZK6L2444888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc551df7e65e1db8b55e3cf15b9753bccb9e632b73a5379a52782d584c89c9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2315011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc551df7e65e1db8b55e3cf15b9753bccb9e632b73a5379a52782d584c89c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWW2315011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07998be4e900111a9a5ebcced9916441caa2f54964f1d51424508931527ad85f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:56Z), 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/QZTB42302866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc9d4bc500e58ebe961f208ebe295f0124e4b84f29e877c85b329cc7d7dd44f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:32Z), 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/QZHN72475388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac04845861f6d9512580887dd63b0d66ee31ecd512921225a751a7cfc91c646. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTB92352086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30d58c616db9a7aa0566843554482f501e4f7dd5861b928ebe8f9d29aabdfc. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZK6P2385684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a15468fb29976f11044de5917abdfc1b9075d41adb8f05d8c460834b1f6f446. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFK2350597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92450d1e052326d8f852c39c9b575a2d7b9a601956db593960c07770abdcb55e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:21Z), 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/QZZ7Q2454834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f415698bd0752c1b934807fd634b342a25d310284e903c16f2fe7df3b7baf9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:41Z), 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/QZK6P2361918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1af042e74be2da3c3cdc6bbc94afc3d788be9d942ede8b698a84a33baef072. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZFZ22586270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e351160585df37d4f2f9fdfe75e19c949fcdd94de37799566dc42e4dc3164d0. 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/QZTAY2447710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07024a7000e0793a55fe6d7c10a245f121326f9224201ba01e0e938fe9e95e4e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:46Z), 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/QZZ7Q2454837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d22d838e98b42efb2e61fc66f2eaf0a1a609f3197da8027f9de3f6c3d8c21d. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZWFK2350596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae0eade62f0567d13034bdaadbc26e23177216c57feb83564833cf2c712804f. 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/QZMEQ2595642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda90a2fb48f8e580178d8fc61dfea4abacf8b9fbbaa0885d5bfd5f0ad019cfe4. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:22Z), 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/QZNWV2510765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63ecc17693cb8865df10bd47a55438bd6b3c0e41243b23cbdeb0a20cd670852. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWS2560372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6edd2f839ff58de5507ba409965c7a2ab419623c29148e9ad88f0f71ae0a2d4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFJ2539772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf579394dcabaa6fb0066d474be5ba171305cd91dc06d0fb24138eda973f9c80e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFG2591660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9200091bbccf03e915b105510e9dd48bc17f326982066e8588e07ea92f2800f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:47:39Z), 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/QZNWQ2349724.