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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1468c8f55e6c59115405644dc7f3de30d5f221d1fa7d9bbeb2ad404c3ce219a8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZMHL2065763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc158abdcbe9aad718bc26b1047d5370df4b4bf7bd1f95b8752bec6fc5559bfac. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZMHK2093366.
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 0xc554ba884be5e585980ca692f5778e20eb8733ba23d5eb4456094cba7a90c15b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMHL2094864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eef704ab80c1b9bb208d135e2fb263220b17a9decff5262713877ac22db321. 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/QZMHM2057235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae533203dfdca0107b318b5bd5e9327d3204fddf07602f93957fa930ba7dadd. 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/CA5KR2270486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d2dbc2ad66d5c3dd1ba95311fb2c1c1dc8fe2f285e8efbb7c5512db0587b90. 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/CA5KR2270475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc829d088585f08330215094c218dc4b5e4e2f3a29e760e3c635e82e2dcf304. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA5KR2270476.
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 0x2cefc07b132059bde632e1db0a7d1f5faf1a9d5489fda38ebf532c50878b322b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CA5KR2270478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c7b19d61a27288b9d113bd4badd9902e8640daa970309628590832df0786c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 0x5e98ab434928fb5a131b9b14f5b18c674c374e233c3aa235f3f81047b671a407. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CA5KR2270480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87030c15329a1e358858aee8e81ec8360e69791575d72e93dae306b5bd494154. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA5KR2270481.
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 0xf6f9834239e9a61846b3c319ea867cdbee0d92a99f20ee2861ddf787f2b50cc7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CA5KR2270483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeb2d0277ab1485e920bb1c620e87d57080ae457328df12089bec05f44084cc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2270484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef93283dc1fae181607e6ee1e1d45768842309290205e3617d56f9a910998f9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA5KR2270485.
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 0x222f08c60dbe93817ff44d37d50ae8999eb23f2e9795ca6e743ff3944412eda0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CA5KR2270487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31685e8f99b74aeef351e3552b8c6f9d7aa8af879a51c566a0f277e916bb9a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CA5KR2270488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea0905e4d56e5143124c73b8022dde83bfabd4f9d7770a76ae59fb6e562c50e. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CA5KR2270489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9cab553dc51ad4ea7d840a922683a92cc7cc2b80f3018cee96308c09bf9c90. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2270490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79abb03261beaab4935e6df852ec1d389cf14cd3c47c9dec82d3e8817c87ef5f. 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/CA5KR2270491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36d69ab0325e42abf5e6c210e83a7939377fd7ab4910940304c035f24886d3. 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/CA5KR2270493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0226644a85eae9dbb85834669b930fecd7127a02c794b6fc3049e7421acfa32. 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/CA5KR2270494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f25cec40126d5d6743d0b3ca1b6da3a892f73df2726b7ddc0746f74700b2dc7. 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/CA5KR2270495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f94112c00cabd0861aa14a3419753cab2f4c07d4896d029490edd7ca28b6e. 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/GBLV62011739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd592044afb4ee535a771f3a6521cef63d226eddef15f353e28adcb466bcfa6. 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/CA5KR2156283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268138808ee44967932ffc63ed4f04fcbdf6e8bea096543de26a26dae92304f4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMHN2022029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ecfbb0ba0f5fcb1ed4fd6f02fe67749a13fb1b36b74ddd0ab9759419c923d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMHL2093490.
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.