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 0xb425d9b72547d5bbad171b93e74fcd0205914243ef180485998399cc94a57963. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e51010ce-6c33-455e-bf84-7bb5b52e122d.json and https://artists.proofprofile.net/proofs/artist/e51010ce-6c33-455e-bf84-7bb5b52e122d.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 0xb7369fc3ce3cf5b10d78e17b5cfb82b83cbb65601b71a40511a98a4aeb6caef2. 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/QZDQH2102843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8152a0cbe63ba636470ad445000f0f75b8514005300fdfe093ea25e39f8007b3. 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/QZDQH2102844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a6fef3cdd840814414d8782bf61abb3a44f936d8c0eae8dd6a89b9f154795. 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/QZDQH2102846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a25b75c7f9b052dbbe3afc49c3345b8eadc102bd5932e17705a967264775cae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDQH2102847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75175be2cdd2421b21ada7e27fd868dbea3a9ea48c562498c756643b8ade8411. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZDQH2102848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602190a0c2ae388cd3e4915d5b8230403db44b2ea1fce343df0c9cf012bc67bd. 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/QZDQH2102850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc02ca357ff1564a66cc8c0896eddef3033b5f9654e691278bac30fbfbffe39f. 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/QZDQH2102851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d18e083aa7ddf58a3375fac5f08dfd53506a0878575497ad7395a30a4fdd91. 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/QZDQH2101125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d6c6ce065c60715ce888f93dd4de7c426e3f94d713f8fb46056b88ac85977. 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/QZDQH2101127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb359e696d05ca15a62ee52113ad14fa0343d9d5957d50370c021a37a3689d2. 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/QZDQH2101128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e3c5efb8529a672983e8cdc6a69e67e826834ce137c9eef558b12056d328ff. 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/QZDQH2101131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888fd03cb071fa6278417fa432539495dcb5c7ff5e37272a99ae25cc54c342a7. 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/QZDQH2101073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e467a3d4eeb9c3c829159d0d52944ef9318a035acaa1a0e6c6e21bf9467325. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDQH2101074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8b49b5b21cf817d820ef17e212945de1752730b8f7807de9126d2b04eb6358. 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/QZDQH2101079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e1547b9ac39c21698a3256ae7544d014f7be82f32cc7ffac536080600fec6. 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/QZDQH2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7f46b0dde65528ea9198bfa1b711df36bba63bc780a0c6bc3291176b97457c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDQH2101081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8353553319cdef74fb450e5c2a71f8ece94ed1760a41d7cdf2ada6156776c8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDQH2101063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa28aed6c68308ec93d315a0177d3d24a626235075d19add85474ff70948a25. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDQH2101064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e5adc70f424a4cb677bd4ac41414b9724a3e7fb5c3fe821b181388808a4480. 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/QZDQH2101065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122394023752cbffaddf5544bf6b6a1d1be8c84907227dbb791ad8313350ffe6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDQH2101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba80eee37258f1480ffa7680d2f8443be4d00afe5be94aa30a23f4f7a534663. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDQH2101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc56f02bca2e95e6851ff86a010214933c1e3206eee40e566da5e00bf98ab8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDQH2101061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173de764d034e832d32b3a8e9825689d84c6ba8650bef417869446643adb77e2. 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/QZDQH2441062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb01cfda30f0c8e95b2e970a19121de89ea825b59a85f4d8099b69e1d91baff0. 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/QZDQH2441064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851b984a408074e5ed416c41b268e70639ac79cded0c27c4d4e864f4f0269b51. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZDQH2441066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841340b5eb13bd27d97e0211b77394ae1dc9293b892c6d8d16c015b69518db7. 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/QZDQH2441071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ab277c25c3b3fc57370918b1e17b709a42effef46f776612fdb2d95d68ccd1. 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/QZDQH2355068.