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 0x4fb1cae219255f16fc8214b2975d6f705e86901d62d254471a60f79b27535a37. 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/0d3a263d-3882-47c2-a344-6f78faeb908a.json and https://artists.proofprofile.net/proofs/artist/0d3a263d-3882-47c2-a344-6f78faeb908a.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 0x74320f163b01c3b8bcbb1e501a61d7aa0ad820def98c4e9e1e90399466ea8461. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHNC2330269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bada449539f4584fc760e1bb8568a70e0ada421b93e3a67df5fc672fb61903d. 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/QZTB52206081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5220f0789b26a45d8b9afffcb73d7ffa1b001899bd653229b594aa937672a173. 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/QZK6M2490062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf403a7a6722400e7e9a2475c71f4a113dc571a575541e86f6de5d49b2ce5cc3. 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/QZFZ22486195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d6dbd074ea6db198a86750d2fdc56e2ba2b540e6509831b0736d55e736eb64. 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/QZWFS2307265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276e9eb1c269b54d2bc1969d3de542211441cf2c5ebb6af9ee54ff9b120ab0a. 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/QZTB32344889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499ed746dd9c1832128d5e99a45bf297a36604eeef4cf601c58bb7a35f24194. 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/QZNWS2300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc282f688294729950287da0a62fd4112d9292ea1711f15988b420685e6db44d4. 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/QM6P42354580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa403d7e76fed2bc450ffc93dcae2876667b9d1d17ab07c427a740eeccef43ddb. 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/QZFZ72307172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5b0307fac841752ca4ef407655475e0ece8ec200dbb5467ae2b5f21578002. 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/QMFME2297467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c1762afba1edd8a201c2fc75354b32589cae317e0e81203e8c21ab00e9dbf. 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/QZNWQ2205903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d70b7706f139e319a77bd9f6bb741de6adda2cc811ae4a073eafeb6751516. 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/QZHN52231009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d29103cf6787ba6d246703a746a6e26b0c8440daf2717cee6ffa1c5cc52f8f. 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/QZHN32287351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c23571063cbeb33632ca3c8b0198c971b9369461c7b80d72fe9e7f2952b0a. 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/QZDA72206667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854766ce5cab03eb062ddc7d1afd6afcf8eebbae4d501743ebd0df502456d598. 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/QZFYY2264319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0310824c70a5e08b4a74c52febd400b6863c829a00587f5fb0c7b3e29665539. 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/QZTAT2169605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00e356b48211d071b3e952cd1037e96311c680430c331db127f6b8186d3020. 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/QZNWZ2168965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7f4234c261df65eab330cd919df7ebd507d1cbaa4b9549ba33ac5bdc91f5e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWW2106656.