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 0xa55955c8c546986158d2d8702ee23864416830fd8cbe2b0191784e4cafff19df. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f9e99d-6e3b-4499-9359-0483ccf6852d.json and https://artists.proofprofile.net/proofs/artist/c9f9e99d-6e3b-4499-9359-0483ccf6852d.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 0xf7152c8572d72b21cfd9efb61a4caae3e0535346943d884d8dfcc68c8de65dc5. 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/USLZJ2231835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2f8f3f492abb2cbd7f2d09e76b2cc57969b6b8db8e0e340cfa209edb546af. 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/GBWUL2024327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff4b9a338a238e7190d72708dd08787237ff0c81e6905ef77e6947ade334ba4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBWUL2024326.
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 0x126efbb26a10b93b6b8cb7460b09f06f7a3016c7b9bdca2c6166729ea2f8fc4d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBWUL2024328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b12d5b8a30c56bb06adfb5a60d6142277cf1b6ed4abdad309596ea6978e36. 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/QZZEC2319994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf549cd526298f6203cf683e45a70f7ff62ec340b58a16b0ef9e35b82bab4abd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZEC2319984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b6a762fdf76a13067254db977f6e97118b7722069732421856620fab318c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWV32343571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdf1ddf5aa3d40a18ce6d85d7998d26fc88a6a902d8712a793003c6e0eb6fbe. 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/QZWDD2355967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17b252f98cd94c1b6e8649d292fbeec144d46a9253210ca0e63ad677451f31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32351427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa590fd3c04741cd3f3e8aba18a29db708b07f19c29ac8c819f0f72254dd83fb0. 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/QZKDT2300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ec57be3a3edfb366adfc0d344ce490a72b3dd2438b996032d7c39586485fe4. 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/GBWUL2332402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0408a69b53fb281ec656defecacaae834446a5e035151863af76e0366d808499. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2395570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b11a1306aff18ca2cd08cfd388f74906ebfbee9f73c14844889155dba4b6e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2336103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4f167a1214822430cf66fd325d4ae0aa80a0876ba7dab398c4ab9767fe5e8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2336073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac095a17f7b1aa60550951b0d2cf4e2a0e43696422c3b2382297f0d0ff70da61. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDE2206030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa973994546eb92338432c95a5e50e34ba0cecc48f45d5fd283fbd247ceb2bcba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDD2224367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba2e8078088777d7e82c544b6bc88a2761382832d6da510deed0ff88702884. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTRX2234944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e3b607f8161e181352613bfc3633944af9c34df9db6612088d74a11d6cdd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2268153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c47a16a90a6cb7b170d4ca2f98085fe75ae83db2ae91764eab417a8f6dfbcc3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2228146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a279af94977ce09ef16a868e8a2ca5689ec23675cc6ac21785f026fd8735d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2200859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385dddfbd36ec019fa23a75731a47e7c25b79609df75f9567ee45c458f7236f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTRX2114257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf029c2990407121bbcb52f04640143cb299f396b906f4d195fed1a36818702. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2199945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed08f50ae0d02402bcb6ff44adaf69524d5a210f5c9013350663a5638486ac4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2181758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35314f5e491fce0ca0db430952b25139e7b5a65b93f0af1af08f73e6d23ff5. 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/USLZJ2152357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda94b7577928ea50403093e0c8832bc915db979843b3db51b25b946a8893a107. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZKDT2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc40b5069bdf0cd67babe10a00a39eb688f5b17d69dc735166314fcbe52cc5c9. 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/QM4TX2101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f5d147563244e4e38ba6531119a4cdb767a2639b4ef82154e254766017041. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2471200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14e5557712c20de69f8e8dfa39505068ebf3035d872b8653d2154ae8df35ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDE2408747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36667cef99bd0d63618cda9f5fd3132c5ba1121fe4d7c82112bae60f1b679fea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32486244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20458b20170ee7b99a3dc00ea17a4b7750e9326c4d48351aadd78e3c072897e. 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/QZKDT2200587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa8be0a1083179bbb8d25378acfa5f0170c57b56ec3ef97f2e03071bbc8bf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ8A2459619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4e47abc261ee9332a1a5e8ac54c516f2dac655310a7b34c7daaf3db1e000df. 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/QZZ8A2445313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bdc2e4038f6113909aa79811b1082c7c10f2ee57851dc4776ea800bab465fb. 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/QZZ8A2410627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a844b329bef28d8c0d5cf4caaa38223693ed2047e3fc813064c8dcaf75831b. 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/QZGLM2495805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f38d247bf274a8cd25f7b7ce60545c8de53dc51fb48e3702700dbb27f691d2f. 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/GBWUL2138336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed94b8489e9373096aedf7e0d9d74a2438d8579eb48762a02909bad090e8cb. 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/TCAFJ2156802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5cb4cf0305e1a4fa960a678244d5d7a1adc481aa228a68a268ee7e2ac3bd3. 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/TCAFG2070213.