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 0x98b042220bc2fe7622566b9eaf698dc082e66c54dfa2d48ce1bebd54fef4644f. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3938024e-af2d-463f-bb0a-43c9cfd523e2.json and https://artists.proofprofile.net/proofs/artist/3938024e-af2d-463f-bb0a-43c9cfd523e2.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 0x3031d8ae23d136bf749f001aa4857c6d0fa734145ae07c00eeded903084031f1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BXVR02224156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f333f9d05d92639a3fd7bb90163568522c2282e74fb3ee9b7fc0e2630607456. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BXVR02224155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0071af93962d1ba388a09dfc274fd52c3da5ee49becf633358522c2e2bc56dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXVR02224150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4935fea13fda953a308f1057b17794023659507b3534a56357a8e8aa4315ef. 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/BXVR02224153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98490737cbfc0ae347694246e120df465ab7bb9aa0739875b4a9a910694332. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BXVR02224154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac2fad463d7617ca5ab418dcd73daa257cf07eef7ceffc7214a8c70bc100946. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BXVR02224148.
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 0x77cf8c0903082a98d3b91f941e98a263cfd2adb6e97d87a5094899c0e8c77d46. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BXVR02224149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0ccc54b3f752ad1ca94c08f9d986bea8942102afacecc51f4e1e7df8340d9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXVR02224147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b3f810e3282331f1bbb31757d181a8b152b05af2cdfb16351313024b0f765b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXVR02224151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6927de6830b2730acdb059b53bf9a94efc8e289633465312d05ff68f8f31ca. 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/BXVR02224152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aded80833f78b6561213bafd3b7c6db469c7285e44a20896541be3771e93be8. 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/QZAKB2007669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04dbccc93f2de6f2319b9fff627d0c234d77208b6425087fcb5dbc8aebbc1ee. 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/QZAKB2007671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba9018a8617d711c554b3b31fb129d1dacb22d5adce5c23a3e2932fb8abd9b8. 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/QZAKB2007672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6dd87ab861b638d7d000693caf2680acc80e48d2bbe0803cd7c8f0726d834. 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/QZAKB2007673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bc698d514b08f45d3edf8bd03cd1f13851c058458624ddda4f99e096ec5628. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2007675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cab8315faa4be591b5143164b63de1381cca302fe346f887d201ca1ee6b012f. 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/QZAKB2007676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bae08428af1d0fbc37f0190b9d9b12b5db40de706ee05d9b780234a0f0a655. 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/QZAKB2007678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05622d412fefd139ebeb7f9780836f03797ef864d8b7339620de4868777a79e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZAKB2007667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e1fa226fe93b73134132ef5577ef44b931f2c64b9b089396f5d5963da383b3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZAKB2007668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067ed9132f5d01b8c297acee2d881b914c1d82e7914d323bdde6f8106cb52d46. 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/QZAKB2007670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e31394f1e77db847ac557d63e8b15962721af81ed66b175c12ad5438560d9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZAKB2007677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f240b6695f0251e1758be932db51d2053bf4ecbb9fb195ea10836570958d84. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZAKB2007679.