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 0x84652de84152e2c45f63b1dfaa6f730ea307fbcdb6bc69f66d27e55257e9dd53. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ee0011-0295-4a4f-95b0-c34918a0a7ec.json and https://artists.proofprofile.net/proofs/artist/66ee0011-0295-4a4f-95b0-c34918a0a7ec.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 0x12d0653afca58f32d62969bc5757ff0a323fa9a6b54b95c754802ab1187cbe4e. 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/ES75E2406877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664fecfa0eaf40ff47d9a490c411e943184d3df332f6db8e6a00cef760dcfdb. 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/USY242415678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0a227f5da8d0dc048a5cf7f39c4dbcfed99d92a2b90f1e1fe3a691bc9a077. 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/USY242415679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbd2dbdfa4e7d43abcbb3d00359d3c1c7c4ce279d33da7dcc80f1b98701e32. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES75E2414823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a889396272ba06d34b0dadedf51c77c67d5949cfae9ff67fd5992bce705c87. 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/ES75E2414824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487ccb0418d08f90a0a130e46b11a7591fba0997525db9b121ffd1fe8cafd4f6. 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/ES75E2414826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd99ec94da1cfb1cb33deb7cf553cc9bb6f5a0d6d8a65557ea87181fbc1f61f. 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/SE6QE2430325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c161d7c8beb24d6a2f142088427bcb7a6a6802500a0dd091a1282aba735003d. 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/ES75E2414827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cecf3977f56537bc224a1be7ff52f5a6af7f1055af644dbe9f9703cde39c26. 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/ES75E2414828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e89dc38bde669cdb2c3414057aa200d06204355c5c8dc18dced509311659d8. 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/ES75E2414829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d3ad7bc60afed62b8a8bc6bca78d9d9504a9ec96fbe1f9fe0d9143f939682. 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/ES75E2414830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7943675f3e21f3e9d5b052960a9623ab45f8baa91d019517e27ffc1773063ef. 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/USHM82510650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda423cd213d48c0c39ff3e8af26232df83f8258ea9e459ccfe455b745015152b. 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/USHM82337041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb98ed9282716367d37f30c5b11c5956e93f555720a0c38ed42ac0910fa17c. 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/USHM82337042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f878bbf33afea94246c01a95b829ba6b53589c70dad400b7ccda4841a760d. 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/USHM82337045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51502aea4a2babb4f5d3ac2f0c9a066e782d6184983b07cf3f41293004daed8. 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/QZDA52194616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90424fb7c4b2dedec66c9275a024d488a650f7c239d1968d4df3c65ddacacb88. 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/QZNWZ2169695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629ef267c3454261af3a356f2f0a5b13709c8c7920dff16b810bc987cf81f7e. 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/QZHN92129307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec828496699c3c87cad8693929c0d899d7f6c401ec2cec589cdb20870bc5a3b. 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/SE5BU2571797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712772b45b2ded44aa34fd24035a9411b7961a92d5b7ec5532476ae45eaa9cbe. 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/SE5BU2571798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db8d5a43f54827aed4ab701c1cb6ee6c833a84216b8f84e6ce1cfa62bee24a3. 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/SE5BU2571799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47eb02ef844ca9a7abd8f0456d40e77ff054f89dff38751396ebb56e2f863a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2571800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfe1aa4ca8dcee3a7e4aa08bee2e4d0940634bb489c6b1b2816bd8f0fa3a3fe. 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/SE5BU2571801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf54e2cdd35a1c6a0d210a5148f05b11d6c9035f7c7c455f4eb07042755ace. 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/SE5BU2571802.