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 0x346f5a00a63abeb9a6db3a695ff8d5bf9165970f63d91a1b2f8557a423d6cc64. 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/8bd99230-25a9-47bc-87f6-4a01c3fbc134.json and https://artists.proofprofile.net/proofs/artist/8bd99230-25a9-47bc-87f6-4a01c3fbc134.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 0x5c49bac15762c07c739cc2a35b70bc8d3ccae8ae35bea07599af2a190a77ee58. 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/ES71G2024981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fff1569a41f15aa0e4360dceff3636158050275a7951bff7ed8dd87294899fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2019003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603b273f79ade255a2753b6fa99f8e5bfa9792afb12d664d1cb93f1ee7c4481. 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/QMFME2091935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a215611217313a7579ea6bce2b9c60e9d176c9dd1e1272940e260b2c51ead. 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/ES71G2034882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf912b337ed279e4000c55ce0a965ff2b60a146fabf793bcca10770b95d06d044. 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/ES71G2232460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662ef8ac339e205680161243ba89c595eea55a06afef672bad48b17042ec6c78. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1930666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d7292e3a9809d5a2cde62661b961b063583ed4001d7af408b7c33f9390890c. 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/QMDA72149862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a29eae2a8a6131b9dd1b33e0f28436d8cdc9d494454243c2a30787086978de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2160062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934234ce72247504d3f77b94ef6d5e1953e55969cc67424eb9be250d9284cb91. 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/QM6N22195654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f810404d4a9aad9d9e0c06e53c64a006af652d6d0e58dbacedb0a85f051005. 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/QM6N22437587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3e95f667e75c90925e0dc718916691c98db74a52265be326e95a3d4c9c1a6. 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/QZTVM2356778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6290bea7df11d78c6a6fc455dd6606f7a0eb66f784c48c6b9059842a237f619. 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/ES71G2245251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed2cad44e50244b2b30f35c646021c4cdeb58b5d8ecf52fea66eb4734a1e10. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2215344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd59ebb9dd10306c46499a293be5a97d9b24fe63ce4c6d7daddef8ebcbe30a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2210757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cb32336c23171dc36b6e1124a56d8ed1bb087b0231e7b027362108de728f4c. 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/QMFME2166732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba61f246118a1711568bd0aab144fbf79fb2e99366f9c4de2b7e3a5b6319b7. 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/ES71G2049296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeebd04d764edcfb0d61a958135ff3138a744d0ae143ffc09ae9a300f273e29. 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/QM7282054314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d7ce9c7cd0dc928c48d2e2ef2c826499b3861c16dd95ccd9652cc82c9bfef. 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/QM4TX2008288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da821097a0cb562445951973791c7fe04dd05b0cfa264cf53fac733359a044. 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/ES71G1922203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2755ad3ab43c7d6b019434d4a720e15639411162fe0bebd53934f68c9350d0d. 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/QM6MZ1924399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099514b0c3a2cdf633e4a815bffba72e460baad159e4d902a687bdec5f2cfb9. 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/ES71G1940112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6cf9d4b89f16245bcb9e06f25a6ed4979df7b2d6b3062ca0a4037ab7d52024. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2338333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a3eee83f0da4060d069fe3a4c3ffb6ea10369d6d6e061bbf9edf26d223ffe. 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/USA2P2136925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776bb3bf8ad0fa8ea591ea95bec7828630acf5ee77f45b7f25d8059549c544af. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P2136920.
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 0x0a957a66ce490c0e48756419e2e5d26eb2ca0f06fd41c11213cac9181bfdf130. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P2136923.