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 0x6981353453109e7115631fe56975b0fd3122166f5652cb130837bf36320880b8. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b75861ea-726c-4522-aa73-525d374a0e9b.json and https://artists.proofprofile.net/proofs/artist/b75861ea-726c-4522-aa73-525d374a0e9b.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 0x51a3aeb667738699b4115b52cf0559dc9bb619a70d525d6727f52eb60d3a8197. 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/USHM92139855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda7d4239d10ea0673af7a44c02e558bddcc34ca3c776e0f5243225463323fb. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USHM92139856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc1c5070acacaebbc121a846f203a77a550130df86f9d89432f91ae1362f78. 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/USHM92139857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda52b193513565ae0ec90c2dc7ecd7fc40f6542304aab98a266518dfa4007dc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM92139858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d950f4f75978fbfafc2d8a96a80479cdf0131cc89d03b5edcfdba71066d8b4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM92139859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628130b2f82cd40d1ac29c6d83970d17a0137049d32a0b8798e8edd8aa2c29d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM92139860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe82b14c77c07219e15f3fc11b3623403fc3bec75c6d1d7e3c683bb8d806b99. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM92139861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998ed67625dad2d57249faa8ba7b6ae06c21da4130819874cbcd2461b1dc000. 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/USHM92139862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1095a3111ed07052ab195233fe0fa765cfaab9aacafbe66f78772c6724727. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM92139864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574ec78aa7e1309f9e90ff2dec8ab695678a5f44bacf7f004bbf46634968771. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USHM81629622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3213d4cab5dcc97484b9d547918af0d6f0f753dcb0dce15941633f45ff601b39. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHM81629623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bbc574c0499e4092bdffe48113fe9ac16744f460b0dbdf43a4a8dc8866aeaf. 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/USHM81629624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2cb3bc8f8bd395ba2686f0491fd84d0837edf8c07b7910eba44bfc1cbe134. 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/USHM81629625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494b7c789de15be0a062e49fe8828ae1fa1745374fc6ad0eb136c73a99e046f6. 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/USHM81629626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ced3b15caae93da1107b60d075818a627c1d292e6abfd5c3635d39329271c0. 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/USHM81629627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888c301cfd29da307c06fd93cc4aed6f74a6d036ee33f96eedeca62ca99d7340. 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/USHM81629628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb944ee1b7b2d5c5a3c1f2bde33a1d066a92b1da567cc6e95ea5400265cf25c00. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USCGJ0607335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91c1f186c412edf84878a98ea16ccc5eb4987c49fcc5d2cb4c73f134f01986. 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/USCGJ0607336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6eb115b48c9273f1df8300ce97a3f40c60e88abe3a7dd1d5a6fb89ceb4e8a. 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/USCGJ0607337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd9065bd4a3abb0be5f64189db5fb8ab5fbd3b06c00aca59e541e7380473193. 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/USHM80621110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded0f46dc27259bc009834659eb9c36a450ad170c313adb85cf6d5190261fac6. 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/USHM80621114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17868f629db27a0ebbbe337047685d0fd9dd9e2b33ecbf34c7d8d7bff7a2d581. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM90647259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb5a04e27cbac47a401744e8cf68361659696f3a98e6375f210a9cba18ed3b6. 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/USHM90647260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b2b5b781943cf8fbd2abcca0d1151aa557200fb2134757ef80e8dfcd5f92d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM90647261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3d4ca756b60f75fa8b8fcbb1d2a23f08b647ccab6f68d958b3c6e10f7acc68. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM90647262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af33c1b2daad0b932143b79658cfd8e1d2ba96e099b47201341c61148c05167. 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/USHM90647265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f47da4d7cc5c198fe42dc029511cfe1f250e275d6bca9306f6b07fa5f14377d. 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/USHM90647267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6146c8a1f3ed88798574f55e91d17ddd474280244a230fa4157a121b318c77de. 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/QMEU32409517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a1b2bfde8c725328ef4347e01595b2628c6375ce71e538612fd27ec8b6b842. 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/QMEU32311310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b59ea8fc0c361d88f5a0da752142dd88363cc359a60b1819529e922f308701. 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/QMEU32301464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac9e205ee850083fff8143842a24f3ddf63a0bc653d9d17010289f787470f11. 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/QMEU32022230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e23c1aba7dee4949c6121c334a99a15fe8a4e55111525c508a64c6b73d24afd. 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/USHM91982597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca8cfcc5d0667b14511d606cc564a234a35ab9418059c7ce82aad33f63fdc3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGJ1999099.