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 0xdbf19fea8b37b728cfbc37ab4546e7c91009fdc5d46469dd17aaa3bde15b843c. 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/2156858e-1636-4a77-8d15-b394c80d0766.json and https://artists.proofprofile.net/proofs/artist/2156858e-1636-4a77-8d15-b394c80d0766.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 0x8fedea1522a4e00061191a63a089a87577e7cb76f29da5d3e187edc1a9fbd11c. 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/NLM5S2402145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdcc3d6119baa107f6a36343fdf3a8f18078b5c93f93da3ce1c1f9749e9a659. 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/NLM5S2402147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedea1522a4e00061191a63a089a87577e7cb76f29da5d3e187edc1a9fbd11c. 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/NLM5S2402145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36ef4238cc38d9c13678992cb81d0b6ef47d0eaf48a72da87a41c3e201f5e2. 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/GBXGT1200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093acb91fb339422a389eb9ba68e800a68784b6d967e1f78385a8395aec3ae66. 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/NLF712001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa5f0f0877557ec1770ca1675f3ab2b9ff387c3ff7117db76481ee49b8f81d. 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/NLF712103874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d906b32b58367b742ed427e136dfb29a7768b383d3b26608fc8e60310091c. 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/NLF711700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350ac26d6d047836017ad690f59dd9e43eea40b67d3132791a2d9621e978e0db. 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/NLUW22201770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2459cea3f4d35d975737e41cc226836f4178648513e254e792be7b5b2fb43b6. 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/NLUW22201771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acc4f516a4acd0601ff7fbcbaf8d9a2f198ca0e2930531e1c3652443496a981. 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/GBAYE1100779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3283a8b4ba8e34091d93269687a51a01a87a54ba50e3340c6854b9fbd6c635. 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/NLUW22402477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b250fa1713a2b644c2d72ef1f56d66f7907e0a64408402cc5e170e6ebd75c33. 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/NLUW22402478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd745a46518bb67a2ba95e6e638684ebf7250099d35fcecb63822bdb4c7ad0ee6. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/NLRD52257538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb695d0154b90f0c0d5a0bf4cd92d96704548feb875fd652b36a8e28cb54adb. 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/NLRD52257536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9649db3956ae2e0a8af3583b6f850fbee9600cddf6dd640a383f2d7c384cdc86. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLRD52257549.