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 0x129ff7da683969b217df9c47248dec2372bb7e41de0247fafe9e396ddfd0fba0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/915192b6-35ef-4cb6-b262-7b03d93e9499.json and https://artists.proofprofile.net/proofs/artist/915192b6-35ef-4cb6-b262-7b03d93e9499.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 0xde8014a4c070ec477763828968f9f58d3f80f80137c76aa6ac3b94fd40d6b5fb. 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/QZUCN2201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ae35d5869528abd52a61a7cff8da70fdc993309e9bea8934ad84723e95cb38. 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/DEPI82423771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef89aec6509cd5a082b91466f09d6587f5922acdb51a268c622721f30c18087. 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/QZK6H2483445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894ad36fe70e731e0373b9da4c9888c3fc16a1a6b9a1a7ba69cfccf821fc612. 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/QZES92415772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303a1c22b206c72a2a9908edbabc2287490ff15338197028b505c701d4f5ead. 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/GBKQU2346509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb78fa36963222b48e6c5577a9b7ab2526f2522d5e4a2be10fecd66c18d49c2. 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/QZES62308683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b69f3d890120d571059122f3d0947584692015f9d0ae09977f9e22349f7418. 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/QZTAZ2284889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d3a5b4f050c3372e4b7c181c87a84e958dbb24050792e0d1d9e5ec51fb3a7. 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/FR9W12440506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fce440a968ffa461c485bd3d93cd989c670627e1e9f22592f6f0e891587925. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12440507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949765ef11fdaf33bf12d5a6d26101b9e3c7472ae522072b9923a7c7e8f0ff85. 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/QZS672456897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be804256a4eaff11694dd9434b83a99a936d757c2792ffe9372d4393b563e2. 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/QZS662491966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84b205b9edc0f904a813ee028f21deb4c58bc847ac1d51931e67dffe1b5b7ab. 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/QZMHL2455976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac33e6af4932051631f528eb606ba59ea04992d8b533b6a94b4b677243818573. 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/QZS662437145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06426331209811a9ea2188433879fa78a5ef9a9f2b4e425b97d0000a2f678114. 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/FR9W12440511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af1df083f2fa454da962a573361a413b078bd91ef545803914902d58ccf82b. 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/QZMHL2435427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbcdb17372230694dfaf5a32bfbfba67ba69afeccf840f3eb9c986212aeb2be. 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/QZMHM2431483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a23377e03bdf5b9a47c703f3145682fd37eaa896cd7ab229ecb75905c4786f6. 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/QZMHK2479525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b0bebc500e6b7db6b859643d3f254c13f904f8ecb674b2b52232b4bf58424. 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/FR9W12440513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ed6fd8604de1441d722f0055f35dc47057bd636c69d3e890dc94cc5fa6d4dc. 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/FR9W12372343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678b50afc6e7683581233c90dc9a500d75971c4315aae69543787f2b19761cbf. 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/FR9W12372345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303a1c22b206c72a2a9908edbabc2287490ff15338197028b505c701d4f5ead. 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/GBKQU2346509.