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 0xb1c96fe8676796acd6ea3213a9ff8edc56a972a3afd3a1f31969266b4175b719. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b043fdde-e732-43b1-a7fa-2e681c4a2d87.json and https://artists.proofprofile.net/proofs/artist/b043fdde-e732-43b1-a7fa-2e681c4a2d87.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 0x3fc5707d3b223bfab25b33b39926cadb04be134574569fd33efdfdd9e28e984e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAS2194878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84546d6f831083662823ebe629294eeaed874bd03ed50c2372f895f3d90b3d5a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZMEM2295685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130df9321da4944cb310f489be0e2c53e23ee5722d4b9b79ec6384a8a28a3330. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAX2248043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aae2d6a2d0bccdd57c4f5d527a4e35a1b8f5d6d546d3af57c0d86e032f542b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZK6F2374221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da95b9037a9daea58ee1f35c3e1d8847f63e590137697397cc081eb962ae74. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6F2374223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984bbbdcdf0270c95fefb9c7823917fc8772cdf8c517ce60c9c0484d1b67d645. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZDA42385548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1afb75df4caa306d2c77168cea8dbdf2ec3c9efb283bd1f6ab01180536bd38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2374228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a93bf7834b2d7bbd66529da67cd59b5ebf28d50f7b86ce5d25db206f3fddf6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6F2374229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f54ace5b6fc1aebf45f38d1dd22a013f7a838daff98573715a9ada7aa4009. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6F2374230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f5b5ba7714dd9ccf1b0aaf6b1e38d4a1ebb24eae4e2500998c16567343f5b. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZMEM2428087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce79b4c65feb59d06dad7c02ad0ef917ef5010141cc7b42245376d2fae1b857. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEM2428088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641c8dd5e51c225b7956926d03e721d5002b8a5c6d72733fbf82403c4d4237b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEM2428091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe076bee21324e114a4ce9aeefb19a62a8b79aa815e6125ce90c08e29513ca6be. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEM2428093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179e0c4adf3a00323588eefb69ecb959dc6407cc712fdcab207f61a695accced. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZMEM2428094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7f96af1bdf0e3571c14a7b036387f9e6bd228afa83685916b08768d7cdf02d. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZMEM2428097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6868b37700444e5bd190dd6c989fb1cb002df785418598ee6339e697a74d758. 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/QZMER2543081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfcb1c6b6da7223ab3990af6576f98a8f06c2428b7db6adad544a4c49cfc9b1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6P2532820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ebff3994f5a2f72e5c09f628c2bef46a568163dc6f7fceecb00e18c87c1d6b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMER2543082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36263a573e3bec16aa32ec23db1a7838545becdb36fbf969d12d4ed870f01598. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ7Q2421671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf1370014910ea97b727c100144fe43bece24e775e4beccefc6d9222edb37fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMER2543083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd3680c00d11f24682dd9c8867c124d8fb25395d382c53613ea9c30304ab29. 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/QZMER2543084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f7648e1e4caf83862c1833a1233fba75ddf2492c5a7ba3dab37c693f736ed9. 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/QZWFH2465473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf251f0f7620622cbcd8555cf7d6d797181109c8bb0725471398be471b5c886f9. 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/QZMER2543085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b924d620daa063d20eceb9e6f0f19b26b1fa299afdf4f279210420590eca11. 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/QZMER2543086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a1783a9a7da2bae802913151ef4700cbacfcfcb0689f16f1c905e0b53698f. 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/QZMER2543087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48698050a8f214bab93f0c188c3d5ae6267e70e4b37915e814ab57079107892c. 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/QZMER2543088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a1d9a9bdf5cd5f23fc2fc90ba4bc440b5ff0c4d504d76abf591bd9402b7456. 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/QZFYZ2544588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdb8368e3f2ea0e9de8dcbf827de791b4eda8b1574fb9ca68c7f89708bf875d. 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/QZMER2543089.