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 0x39186084896441de853c9d204e767e8b1400199675d6fe8a8900ae7df3921741. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f20165e9-8c8d-434a-9fa0-d77c84f61570.json and https://artists.proofprofile.net/proofs/artist/f20165e9-8c8d-434a-9fa0-d77c84f61570.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 0x8d023999eb34c51ae3fe1ddb4f891caad82e01f28a0399977ef219431925ccc1. 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/ITZB51810177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305bd52d9b5f3c076426a8a6b47fe52c1e74ecedd62a5a894dcf2b48b836cbd5. 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/ITDK91800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5814c6bde7efd74aa344da262bb90a3851d2ee238e7cfab0168829d595f8ea1. 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/ITZB51810154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b0dc6505e4d44d6b542df1e01576f37f89f0c8ee3544da7c5df1414c2e15d8. 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/ITZB51810189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76037bbe8b6a24eb79d90592e782232928214b6d79c1fd3845f267cb008cd536. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZB51810193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59a70258e7dbfc2c1002447382a8e472503e140f247656ccbc8ad5a7d9949e6. 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/QMEU32208211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfa847d9af3213b55a7f305d8daca467bebb9e1e01d9801c3380d0b55a0d5e9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMEU32208212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e3801c7dceda03411c1f1d6ac593097ed4d84f8edff5912a34384a66d2bfd. 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/QMEU32208215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f317b3c57f7878eee27d95994e045a2c1cbfd941a9f937dfefc595914f6e050. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMEU32208213.
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 0x6081ed825a0a523e17457a5a2022abe8c50e7b2cc8439a8d6c33e88ab1762ef5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMEU32208214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabe9fbca7639c8b94a24b0b5495f929233e22fc8db1ab826d8d32d47d605cc. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QMEU32208216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20804db8f3ba274624d45a088a6ce5406213c38d07d36e77d21d01c9bac788f5. 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/QMEU32208217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09a873d8d7af6fa42e9518268fe024b68a36c16f1470104bf3b2ee51d5b3e36. 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/QMEU32208218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044e1b5244bdab8390fd738e674e401e7283087b07166da8771510e6fa5eea11. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMEU32208219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b02c5d8e5475237b6652428aeb7f40de822209f862bc814ced0c5958f9ca70. 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/QMEU32208220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854dfe5600064076a6cfc2908c3b51088d062cbf10ac29596f286fb8852329c. 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/QMEU31906008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e99db9ccdd92c76038056309c9c269de4043b2731fa56210766d24f257382. 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/USY252512654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d04708bb5a16e192801689ddf6cafe3389e06cecc5fc510df87b6327df9751. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWZ2560637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262bd57ca83b7892401eedd385922eb97b30eb1fb1669011f1ed497d92828e78. 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/QZK6N2525236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39e9c51a59635c0b35b9d2e3b9da282d1d8b9b63d283e33c323c2835e142f9. 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/QZDA81954976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a02392dd52d066da8cab35abbf40e5e35c3ae817f03e77f026ae6140817b0c. 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/QZK6M1920859.