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 0x515142aaf7e1476bde95d4d6c98a6440692a2b55cfeb0ec65b39e6830f12fbd9. 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/890b5702-088b-4fd4-8791-fd85e7608181.json and https://artists.proofprofile.net/proofs/artist/890b5702-088b-4fd4-8791-fd85e7608181.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 0x4f64326c4d29d78168ae7219071efc70628148708732b12e5feef40d060e733d. 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/QZGWW1961649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52da856eb43bce77af53517e2808df564cd5ee176b794a32fd06a841c6143cf5. 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/QZFZ72009020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fffeae118941fc6d74b516b24dc89c8be595cdf0befd321c893c09d1957f47. 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/QZHN82058376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983babb8ba7bee50eb0b2e6ed9e751c6330050b8b72186ce5863a47ec360825. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAFE2087487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e21adfd88f96559c50a418c39072acb00fc0114de324fa88048c8c9bc4c562. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAFG2057618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b250a4e26d8713f5549fbc737de264c4784145045c7c71e06f1b4b60f9dfe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL5HJ2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a329e42b7817a4fba0b5763ebf2eea61a1ac307bae23aae7d830790b6faee6a. 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/NL5HJ2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aced3cb374ddc1b9f6296d0481816233e3398e8bec3416c213e5bb1f26a09a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5HJ2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6dbb1e3ac8ac30d6eae52e9ca3af14907f00e184aff2940b6fdd08871c2d33. 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/NL5HJ2100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3810d6cd17ee9ff97392758101cf0be7122d64c82ef013b63374c5baea7c38. 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/NL5HJ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcd936f5dd00f63177f72d2a6d0b39a8dfa7b6a7707b6ba4951fb4b1e89d117. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/NL5MF2101195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfded6eb62c8bb258c93227a2bad86f11c6cff30970d99d82799b639275491126. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL5MF2101358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ab49e7e32697b18e39b374f3a34fcbacae443e13ae5a8b1e8fc3d5205d2a62. 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/QMFME2003496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8150c4a95f923dcaea6ac4053ef2c9ec371ec7797eaf10027cfb063e37d0b. 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/NLS5K2000139.