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 0x7e39cb8551f42b14122615df98c42efef3f82593252f85a13bfdc7e6d3446a62. 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/2ecf278e-84bf-4e3b-986e-84d8a688a732.json and https://artists.proofprofile.net/proofs/artist/2ecf278e-84bf-4e3b-986e-84d8a688a732.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 0x95bdc8b84ee9c0ce72b43856cbebfa9071d46c406cb06a61d7d73efe0095cd95. 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/CA5KR2376062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f1cde489c800e455095e3e5696c97bc506309498928d6adbc1f92fe88cc903. 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/CA5KR2307942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08294924c465fe3603335e719d7bf1936fed16974daf27c95c466642eb23c894. 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/CA5KR2307943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e33e80ec40b0be02d28107bdd56c351a08dd8e1fb3be6dd5f54cf0b75f5c32. 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/CA5KR2307944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad02f3b16e373f3f1425fa0128b33ec24df670c8399a0ec60f6e116de6c3b3a. 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/CA5KR2299887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f00be764f4b9d2ecd6454ed0a24edb6b479c4fa87cbc6ac35635442fcf9120. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2299888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9fbed3fc1ff480107f4b7abb6e48cb57ffaa179edaf0e32217f9ca7e5b972. 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/CA5KR2299889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f3fb466c619d132ebd5ab5ee9e7d0e590884e1a8aa2217eb38062a8457e24. 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/CA5KR2407184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557da8cde04849d0ed2dee2d095876c8e29a2b8d374875ebc79fa83c5e685da9. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/CA5KR2409547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1331de183dee7486717a6fa675705273634288ccda282c5d3b86f5d81d69b0a. 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/CA5KR2412183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a608291f8662d483a574192e94bebfbaa31a32fe2af75c1d6aab4135081eb8f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2409573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f117df726dd3157707121bc7e62ebe78021b67b8379386ad8106f855b29746. 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/CA5KR2407181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f3fb466c619d132ebd5ab5ee9e7d0e590884e1a8aa2217eb38062a8457e24. 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/CA5KR2407184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8754464176a789a9767e8a243b9ec9eb8e5bf5759c8108278b057576d337e7ee. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CA5KR2305809.