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 0xe23ce1fede526f61303d910cd9941dc04c5e52ea245800882cc1c41799d01b31. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8973ff77-2f62-49df-9b8a-51647ab549a2.json and https://artists.proofprofile.net/proofs/artist/8973ff77-2f62-49df-9b8a-51647ab549a2.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 0xce60461037f26ea1a098402435441689424be1e803ecdedeefc856cf96eb89af. 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/QZMHN2059889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eef704ab80c1b9bb208d135e2fb263220b17a9decff5262713877ac22db321. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMHM2057235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae533203dfdca0107b318b5bd5e9327d3204fddf07602f93957fa930ba7dadd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2270486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d2dbc2ad66d5c3dd1ba95311fb2c1c1dc8fe2f285e8efbb7c5512db0587b90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2270475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4249d8455815484152edbac3cc75314f3640d2ea74129cc1714d2f8934c7da7d. 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/CA5KR2270477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c7b19d61a27288b9d113bd4badd9902e8640daa970309628590832df0786c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2270479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b71c9ac78c43f9d8830f753eb32c057bccb2c3f9f312a5f2d228d086524701d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA5KR2270482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae533203dfdca0107b318b5bd5e9327d3204fddf07602f93957fa930ba7dadd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA5KR2270486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79abb03261beaab4935e6df852ec1d389cf14cd3c47c9dec82d3e8817c87ef5f. 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/CA5KR2270491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36d69ab0325e42abf5e6c210e83a7939377fd7ab4910940304c035f24886d3. 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/CA5KR2270493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0226644a85eae9dbb85834669b930fecd7127a02c794b6fc3049e7421acfa32. 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/CA5KR2270494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f25cec40126d5d6743d0b3ca1b6da3a892f73df2726b7ddc0746f74700b2dc7. 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/CA5KR2270495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f94112c00cabd0861aa14a3419753cab2f4c07d4896d029490edd7ca28b6e. 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/GBLV62011739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd592044afb4ee535a771f3a6521cef63d226eddef15f353e28adcb466bcfa6. 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/CA5KR2156283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ad4d61e7eec2463ab24c2c0932076b63bc7c4334175bfc9cb8eeb63978cd1b. 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/QZMHL2028208.