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 0x3ce25cd435053363e7decb41cc539175efccb44254121c3626785dd43bd734f7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70476c4b-2615-4602-bdd9-f65f306eb2e8.json and https://artists.proofprofile.net/proofs/artist/70476c4b-2615-4602-bdd9-f65f306eb2e8.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 0x5ebea65377b407d9ec4ae5ad3de626769b76918959b842b05489ac14b353dddd. 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/QM3DF2475584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52d3fa6d95544b40ebca4f4c786d88c1a598999efe995497b8bc5039f8ed13. 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/QMANG2256375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c026d375f9f0f1de1f3d3c86860e883db0219b8f046c02442213709374b6919. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3DF2471014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc15182f78b9029b53e1229f2b08ce54ec6ec3bbfcd71659c599d31797d4fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2486892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e854736332a1a8e5fbaaca5039c985bcd5aeae02702c7fcecd790fa08347169. 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/QMANG2420241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27baa742d9d5d5d2b78218996573554874cd6d6f349e1a00abd6a5cbb862818e. 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/US3DF2403636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efb91010e0e04e73c194c8cafaeb59c478e6a2527b211c0ec0c6309aa715d72. 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/SE6I32450392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d71e2c4adb484b841dea6f51d5ddf5fd5084de57e44316b5d8ade586b3735b2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SE6I32450393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2044fd2f1a79ee267cc1972b3303175369ca852d51634a3f7a7afc5e35a7568. 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/SE6I32450394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eea6d23b68cb5ce881c906388f7227a66128802cafa5f6afa00da23266ab93. 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/SE6I32450395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e382edbb2de08173c67265182a0107fe9971d895cf40647e34f19104a4d40. 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/SE6I32450396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294e0fe92d1a7b91cd8786025301e93e75287ffe977a04f50dd47326f63aed82. 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/SE6I32450397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feb33a1f7fe3c3e02ac8fd992646ed5deada1119c130753a975ac06d2e6324. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US3DF2233244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae13c6bd2ddfbb24b918b63571e2a3fe1947257705483df30bf93430fa7929. 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/US3DF2233245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1c92da469a4355d293ff315d50c20a67a4f8009d282e5faaa78fc43f5ed68e. 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/US3DF2233247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4193a90d44851bac99cac0f2b6a4d93573b1ef2edab06a1eb5c3bc70ec4c5a. 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/USANG2219800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e91f767b1c9919b45b6f890c09c4634ba3bdfedd358057def34355ad359a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2222556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd1dc964c7eb5a1de943c89d17cacf61ac4685c1bbd4c58c4d3a61ad8673e38. 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/USANG2224940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f98a82563339e8686be5d55870453bca9bff6da86fa497e1625f6d28a6d717e. 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/USANG2225042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e9ace52e9d185dbcffa9d192dfb00a2673e8b8352b52c5426b315a748d6a6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USANG2225051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6539a77e118f230f9698bf3953d6ca560b86b22533f6e7b35cfb06eb47296f83. 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/USANG2225050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e92462a1c4adc4e2bfb0518a9d5e57e8b9dbc44df038bc076dd660518f26a1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2225054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef261d516bd07a9bf231141f321679159c699af3757864ca18763325da00ef. 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/US3DF2449287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84733911bec1bec4ae56ce94d384f9d4b809c45dd8ab068553e0542eb078ca73. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US3DF2449286.