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 0xd5baa47aa428af7c1088a1b6ecc31a4bc2396362170faec8b7c59380ac265bfd. 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/352ccce0-02bc-478b-a23e-a4bd9365c934.json and https://artists.proofprofile.net/proofs/artist/352ccce0-02bc-478b-a23e-a4bd9365c934.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 0xf823db4c95e6773b5907adb67c9d4979a07380af8267af56fd6323def6ab3646. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6M2379473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f63c6ac66830a2652b716e580d6585fdfe9a889e2a6268ce5c92ca12804d4d9. 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/QZES72373398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c11a02b41b3ae041baa11931d7f0551635d5c98a266085236f072144b81d3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNWQ2348084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c1e2fda663254f5b605be85ab04ac23342cea48101a5fd3db4d899c7cdfa4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA72447794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb161536d1c01e6c70bbac3ea3ab1a709febead3a953686732b62e9f3fc4f2e92. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:53Z), 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/QZTAU2312657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c01349d941c45076e62ffe18e73fbf1be930502ce664dab6458277cfdd2b2b4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB92361106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe958f1625212e2ec64cac0e5d24d6624936732be35e99e737def1a2b7f40ce. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFYX2466743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c1e2fda663254f5b605be85ab04ac23342cea48101a5fd3db4d899c7cdfa4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA72447794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302eacf7b10026a10c6f64298b935d0cd80527f50495a48225476461b7998e46. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6N2424754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80060817db8953c5295e2b749419077ccd7da36053c4c8843a4c42a32adf37. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2406734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0d0d2dd795498de3d6bc3c84eb37f9cad2ff73c3eb32d917203c06d031241c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB22490287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a03cf0839e4b7aa5e07c460eec1beedc622b486c75b2f826b5c110d5cf1940. 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/QZTBA2463123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf81e76577a9002508a24bc43a7fce86e93cb7fd909b1467885750ee73c8e5. 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/QZWFW2441295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001c480494f890432463eaa0ec9954b4ff7374473dd233711b694fca5b0dfad4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:54Z), 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/QZWFW2441296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9fea22ad5a5f54765b394b0a9bca8fa243fbf3ea1b200c9559f502572370c9. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZZ792408225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872431f6ca69ebde862991100904079054a8c3c6157c9a406c72aa0b24f7cfe. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7R2401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d4b215fe4c8dbc4242335f77a919488781e66837a70e8e1617e0f072bd0b8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7U2416690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf87dfe35a667ccafd23d7b83808efa21c87c9e10cc03977c2bea961e81a25e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT3EZ2428370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed413d0615ac7f56ddfff4da9f65daf794009cddddb0dfb807e00c045db6bc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA42553311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1678a27ba286cde10f36d9f9ee5792bdfc3f6d66f46e327b75d3f5a7a28c4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:22Z), 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/QZNWZ2532600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d28df8ed588c02c1396b4ddbf8c2715884e14d2d8f02e03021e14dadaef141. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWQ2584893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329812b63426ef092a5dd8a039c038585148af261167a075dbbfa3c6a1e5f05. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:03Z), 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/QZWFH2563628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eeaeea8af63ffc36851479ba6583c49fbd8a1bdf5e202244d0c51eed4dc252. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:43:10Z), 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/QZWFS2599936.