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 0x97c187509d6557facaa39d373fabbae80c812d4a02c3539447ad5c49d0ba3535. 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/46f731ec-88aa-4d3f-9346-9309a2610043.json and https://artists.proofprofile.net/proofs/artist/46f731ec-88aa-4d3f-9346-9309a2610043.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 0x0082a2d548f8ad2afbcf9dcdf429dfb9034867d6a4113f5aa7dea5298d6c1b1a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEM2154127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb6de905fba0e24b8833136c2c248c2fa6f18181dd09acd7203f7af74ca56e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6N2248443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5c4c58f97b4556eeec03bf6d42c861d7a610c00421b3d3cae3bb11907719cf. 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/QZNWX2268127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6a7e9d2c98876b055442373c0c88066c85c2d11417eed7a8218fa2e60e7b89. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN82342557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b948390272c5f9af8c2ff1f9a58932d2618e25bd6755a83854c26d7d80e54e4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFYZ2489649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4adcd3ed974eb1ba6ede21b1b23cefc05f0eddfcd8879897f97870c3fe1293. 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/QZPEW2416756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e973c279974277920efefc3d4d9f7f8ef9042965962f3de24fad16f755297f9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UKZGC2404746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc013fb8f5cda3986dacfda2a0d35ffce5667f1203f81c122b9adc4ef9e9d7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFR2414555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98801ccd3eddb6006441c160ffe09b8652ffda30ca6b7c1c6a93c534cf120ec. 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/QMFME2435798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc5ac4104f7f3645a2660a3b82da4416459899105f185e824f1f18d688201a. 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/GXD7V2545461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5fad894140d86689a7b5c9cbe1403449c4db76799cbd73a13dc6e2b8d9ebb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GXD7V2505543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211baea909f880fedbd8fe211be712363451f0a99a56bc07276405f02add25c. 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/GXD7V2510839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41dd87c5622ee806a99113b396aa0d8bf57042b8c694e66e0faacc48ec350ef. 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/GXD7V2577032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973298a95b9c1714c5232af04eb405d44b5e76e41526d047fa7dd622efb21f18. 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/GXD7V2549486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dc5ac4104f7f3645a2660a3b82da4416459899105f185e824f1f18d688201a. 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/GXD7V2545461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b50c76ffdb32f849162c739dc1cf655ac85ffc40bed69955dce7ae0d9cc062. 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/GXD7V2510774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5fad894140d86689a7b5c9cbe1403449c4db76799cbd73a13dc6e2b8d9ebb. 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/GXD7V2505543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba86511822cea79c46ea08e3b02de89de77d298f8868f641305bf5757dee9b82. 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/QZMEN2329390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15e03fc707035dc2b6843502b52f2d502faf6b61626848c1ae6da544188292f. 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/QZVEM2346688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b05c6e8ba780abf8d39f9407553b05ad2223c3a823416882f3d36d0a50c605. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USANG2405242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcffc290dd189bf46b13cdbb9d60a65ae0afd88bc595018d94458fc9fc1f550f. 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/USANG2405243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7969f0cafa799489589f503e1084df3e7c00b5bc579fe430871e38529a4e46de. 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/USANG2405245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f6dc9b7204400627f3eb97b65f9b5664ef121fcdc135e6ad5bef340995fc33. 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/QMANG2247417.