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 0xca2b7d1df082f1ee1b108dcda36340818447c9a5a230938db650e766379c5c82. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67cd8dbf-de73-474e-93a8-903b8f441467.json and https://artists.proofprofile.net/proofs/artist/67cd8dbf-de73-474e-93a8-903b8f441467.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 0x0da8b09f26ce1fd8a301c0496ca40abc03ca80bfb3ecf7cc7408847968a19dc1. 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/USCGH2266512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe767e15abcd04f12828f22102e7a8910ee46f420f6ec89de0eae8d5aaad693dd. 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/USCGH2266513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0b56d47e145cc536a03d07044f242512d3d4d8333083161418ec128afeb48. 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/USCGH2266514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa192b08cd63f657593be64fe567bc8f1385dbf0e38203fb96fc9fd2061e1983d. 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/USCGH2266516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327642d5d973a52711392d11e57d92deac9991872b456647ce98ab209a836c9. 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/USCGH2266517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb741610e882e6c33f3f95bb8a1ea7e5ff769a3b7035b9231c3bc4623074a639f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGH2266518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0632335871e49ab15335966bb8fc8a5c99882424efc7876af0195458f1fb4090. 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/USCGH2266519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ce13da86de3fb025a45afaf06d64501194b59f430c331f384d0c53dfa893b. 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/USCGH2266515.
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 0x83da1c821587ed1145af0bc983cdf0d67f20570d8f7aec88ece95e0004f040a0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGH2266520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171ce94f6684e3a429b9f39425b216c41b7f0d5679fbe008d8e945c73393bc3. 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/USDY42068952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0a67c6b2aa78d5bbe097c3d3b24a7b690cb32dfbcd995c1977d5f19edf6db5. 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/USDY42068956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52757e56a14c7e01b9ed392539ef89ee8acfc8764f627baa4260acd20331bb. 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/USDY42068957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d29b7d17acb5dfa7d754843f9aefa091c9887e4954bdc27d56ed0d076480ca. 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/USDY42068958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffd7ead690706bf151a66193844e4cab97262434bc05c6e4f5677718500a1b7. 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/USDY42068959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b1a4b2cd2aac6fe178028c7d4c153828c7965e3c0cefadd6c727bc835adf7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USDY42068951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12a63ec9a48a2838dd234be84ab949ce9c64cea608f0de24bf9d1d0682205e3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDY42068953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d792071222a38f7448015637a93ebd28cdcdb7a96ee22db967086e5c25c27. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USDY42068954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079df67616b159d293883ee22a7e08ca723bcc40ecf1305d3d33f215a09a9827. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDY42068955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c2ae58aa8c342619238a180d2d7341c7abf5d4d3e8350403962108717b6c5e. 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/CAMEF1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f2da5eeae7d6c33e5cc214f4f56370e93430cad58ab3a1e19a2558b6a05a35. 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/CAMEF1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eaff99e7ea44d94126c7428fd3a34f0bcbb4878f41cdf37dd83284749058ad. 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/CAMEF1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd996a9de2711d2f1754add7b15a89648749121d3040479ac4905cb8a4abd384. 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/CAMEF1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb6d4f937370f9bc1613127f12b4a19cd6b0d093d7d26f1e75dcfbb93901173. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAMEF1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e35f88f4b192dcff0fb3ddd64aca1f477c45499138247d834ba578ecbc40472. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/CAMEF1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5aa50c96b2527b7266bb20d62bfc646ea273a9e37a09cdbe7cf470bb82658. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/CAMEF1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0475faffc1dd687c476657d766556aff35cb045026569a36d9dc99f3d38c7e29. 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/USHM81775168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e7dfcce849a9cb06bf305e1d5f6d0153a04603a566a39399356605d0f9de5e. 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/USHM81775170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6def8b6c72e5d281fe9af78dde5a600a1300c3343465eeeea95fa52f7a0ee4. 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/USHM81775171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5be1f16f226487c330161a8c61def8b9f2337761a5b03e5587e31c8bfbc1b. 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/USHM81775172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb4adb8eadf2bcd7821e25cfc3b90e53efc433cb952b16474cdb7664e70d93d. 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/USHM81775173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18ba9940debceb61553ef95c204f587e062b1c46afe47398bb8330530825df9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81775175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e7543e6aeab73dab7fed62347e57c8b756dd1fbdfd43bc06574819588fd6f. 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/USHM81775177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d500f388c0db112fc55e7a9fd360e6246cd840865e409fd1e110218519117. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM81775167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ea5f138e794de2eb32b6ab285e76cea30f8c0cc5b67501706297042bf91af. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM81775169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cd7cbb47bd8877e4dc57676283b42d29d685b90f7565125cd9844df09c7228. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM81775174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd817a3a91a8bb775fa17afd45652ad69a0f557d403a68fcf506fdc36cb5659f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM81775176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb00e23d75bf76a367983576c29ac33b13e3f06cf0f471d52aa1900ab71c0f4. 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/USDY42457151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2143cf9b8e7117793b690a819a739b2fa4cd2b6564865f01231cb17e86da01. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM22363945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd14656e80a4ba2b9b1f1691543b2acc522300383f77f68f4ee860ac9c6db82. 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/USL4R2126441.