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 0xe02d9c04dace06c88b2e354b1d742d6919e1e23f39531be2c923a22ec7bdf7f3. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ab6b6a2-64b5-46e3-90ae-9a0384a3ead4.json and https://artists.proofprofile.net/proofs/artist/2ab6b6a2-64b5-46e3-90ae-9a0384a3ead4.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 0x1651d284139439da9ad0725fa3c6913abbc643b7145461702826e860fc3c4259. 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/QZPJ32346023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8d045507acedb02254ab87bbb4ae3add6f225c64d72d41809d9be2c79764a. 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/QZPJ32346025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a614112edd6216976a7d905cecc1ec59ce764d323a425e8bb7993cce7eeb144. 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/QZPJ32330559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28053ce0869f43f1afb99c2087712de2ac3cda07d3244ef16abab760fdc06f2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZPJ32331416.
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 0x2b4e8db082de8182945bf9f761dc1189207eae0b4e23f12426854897e9ec4ce4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZPJ32331417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f98f63e13ccf46bca33a6aa17aa55aa098965a6f91f1d031ca07bfc58be9f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZPJ32331420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358df1032e8f049c3a14bd5b10e83612821841b3685aa91672e74f3a5a7daf37. 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/QZPJ32331421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b6ee1b40ba5f413965e727ce6a7fd3679e9853113e1902bf80475179e2a53f. 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/QZPJ32333678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cb5fa3822da7617632eb7f3add305752d6f8bbe1101a22dae2b168f67fa8e0. 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/QZPJ32312905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3874ef6fb9a17cc39403ff13471ba077fcd32493cd1f1c78bd5ab4d6754c14ff. 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/QZPJ32310224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8d64f4d8b31628aee1bc4c0e66e03532ca809856fce08cc90cfad39991dcb4. 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/QZPJ32268616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106a20b7431169f765fd9ff75cc27df69ea5b01d954de5d7daca0349cf485da. 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/QZPJ32180836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f0469d79bb35417f85646fa44f2fe44c37dd3bed42e65d14781e0fb5b7c734. 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/QZPJ32200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb296a04fe892cd0abdd7a146b12f378e5e27e44e32e5aa967e68aba66487ba. 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/QZPJ32333509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d1ae0c6fce9d09f2672f7a8f156264fb149f4d1e9a496ffc2daf80c18eb5cc. 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/QZPJ32341685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b6bbf85b3b391faa1f9ae5d61588ee82f4e13f4fe6f21dabd746d8dd332353. 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/QZPJ32344521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b526f70d710ba23cced1bce159dfc0885a4d105b2b7a016d6842460ac8382. 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/QZPJ32344524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fee7bde0b5b84aeb5d0ed15400f8d0167c4da52d9a21794267c1b5a5b45025. 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/QZPJ32344525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94d762088c7a777b0022182cd2bf0be1198a6eb5a26746562eedff3c1ddbdc4. 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/QZPJ32344041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea68dcba80c5404fbccdd3361ee40f4d6d7e15a10cb30eedd1f8af388c10ca8. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZPJ32344044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cae7cfe6026b7a25f6ced5ce51168959ed72b9604df6887e01c0afcfe321b6b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZPJ32334433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458127691931248fc84ff41847a408dc4e9010924dc2f9fd465b480aa19f8190. 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/QZPJ32355653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f80c4b3fc351e79cf05e8454eb880d8e24a2eaed3e15da449bdf4f8dcc05f. 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/QZPJ32355655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a414064c9d6a000bc14bd3ec823633348ba65dfc73925d4a2813c9504b2d96. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZPJ32355658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aa2cdb221a1e62ba61a22476200ee26b92fb2241622509cc375eb8081f3587. 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/QZPJ32349783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec3ef3b8289a51b1072357cc1910dac4f42199cd3f2b7ad24518daea0cf643. 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/QZPJ32330154.