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 0xb30c2f2791c261ef4f4e870b95335f0bd42d3c9fc5e5585a5c7d26aa5eb7af14. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df1c5657-94ff-4906-ba1a-63a2f1dd0692.json and https://artists.proofprofile.net/proofs/artist/df1c5657-94ff-4906-ba1a-63a2f1dd0692.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 0x6f5d480dc8e7736cc5dad1b9951ca5dc3e60a6df2a6bd7cd285af947a8f5a550. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTRX2430433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78b355c8ee6387c035ff612719ffa9f8b43e217d0638c9b432b0a0096cef7d1. 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/QZTRX2430436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453242314575e83463c1367b146223dc3fc4b72538eb15350798af54e2fbd6e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:17Z), 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/QZTRX2430440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6bea52267c02ef825b0273abd234f25802e10dcc9fd57a1a83b95a650825f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTRX2430441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f6ac352795528aa18a6afc95169998df0527a427af9f2a8893cd6107b57cc7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTRX2430443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c2007237fbd3464d142cbcad336a5b3dfa0549429a01996f7291566f0ac045. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTRX2430449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedec56de28f5d32df03faedded2076221731b7db14fe385233a0786f097fd719. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTRX2430438.
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 0xa39ade7fa01d1639d39f0d26e036a8ed844ba02e795d5768f497067328f45baf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTRX2430439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7940e9398fe76c822ed65413f66e6fc883602d583a3c0b7f85ad612316e6447f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTRX2430445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f60c34bff0c78c0e8a71d76b38583c91f004126125c5c85ceaaba7602d8a0e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTRX2430446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d5e2ada4e75c9851191f5b9fcb67d427f78047a0ebceb9c56b7f71ca4b5882. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR0K11900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eb9725adf4dc57a48440bef309d3bc2ca22da7bf62d84343699119fbc71d2d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BR0K11900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c2e0f0517541f48a46df21b79daf910c2d45c3b0ad5acb2f1ca6dab2c2988a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR0K11900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616dab4e83cae90a026dbaf8fcf403671be8dbda0930b806770a61e7ce6cbb6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BR0K11900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0191189b780ef83cad763f4fa7b22e91259ab38ae37316fd76d8a85a7b3181. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BR0K11900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b80fc7111cf9b5f87f6759db48c5769e5e43daea827d6855194ee406a33356. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BR0K11900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d01949c61a7c2bba1d3e7cb1435c3b357767f47a40b1870094268659fe637. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BR0K11900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece2357de0d9759fe664205d7043f884071e9c31df11feb584283077b9e5ec50. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BR0K11900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8ef0a78a8e68e5f8e21c46c2f32a9ebd5b35056670865c4af346ade43e153e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR0K11600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57699cb70732f5cdbaf7734470512a9409c75d407ba2284887d0e0ff4bae78ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR0K11600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ee0c678345bd583645dd221db297ee90d1aaab75a51fa9c388f878e91afe37. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR0K11600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afbff70ae1003c3768530cc5517de03a5a1b2abfbd4dbd1d521cc25aa4cdb94. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR0K11600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b9b62df1d34e608eed7167f796438bb0a821ee8b7b8770f22ed70660f3620. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BR0K11600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8faf22697653886c2312d083b73db61ef26a6acfac391c3652b9f8f7dd5eb1e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BR0K11600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a1c0cdec9677f2b726bcb0b7cdda7cc5e8292fca0b8047a787df638a279129. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BR0K11600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02fc770715f9326f763d2c0b2bd81d58d632711a473d52ba86197ee7b91898c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BR0K11600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e8451a21a5b47fac46771fa1b4a92715750d719469325de645271278ec68d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BR0K11600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6165af0fabe1ae6fa6f8dbd96db9bc0bc2c349b8cad98e501a72a503ae103b77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR5XQ1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211705ece99ba29c2560ef8f4cf3cf1fedaac4133f5dd6e3ad695fcffeee360a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR5XQ1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa927bf7a13cece76c22a71e27cf02e039c4370ba6f63f5d1db3ed94396bbfa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR5XQ1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262f78b518986460d32b783c1d1d57ccec26832fa3429df58c9885817ee2c7c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRYQD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94e29a08a8052407c144bf8ef13d57e060a599cdb55b3ce654f5de1d12d9f3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRYQD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15a015fc84a0ff9590e3454eff614a83f08fcdbad0e273f726e44f6d262588b. 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/BR0K11800003.