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 0x37ed5f41d15923d5f38d9ff599a1e8cb35fa5245862e159cdc843b71525c60f1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/345add0a-ffb7-4a3d-ba8d-13f5a6032394.json and https://artists.proofprofile.net/proofs/artist/345add0a-ffb7-4a3d-ba8d-13f5a6032394.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 0x3496d7d468ba9d187ef21bd911ddc0aedf7b19efcf98c283a7fee06d5abb274e. 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/QZHN72455660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd642f12202b1d1c3b08e0ae06e15525199ca74698dbcf85985fb21fe3086200f. 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/QZMHM2203236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b5134794172f51736f0da3f5a33f6e1982a72b0895c5708c1128bb31977a7d. 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/USX9P2412233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e7df68d41e55444eca3f79d213516108333d9a7923f4cc19889036f34e52c. 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/USX9P2412235.
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 0x59d7b85170704a278cd833e226e28026d88e87689f5a949248292a2559479f8d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72576128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab37d7bd35284993ab67269481536dd2e0666c7ba02a4de5f3e7796d1fbcbb6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA72576129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa0acfff6e78dfa4cc9d4abf44fbff79aefad6ef1a80bed0c0e43227978401. 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/QZDA72576130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e33f53c9a19000f4d68fedf491d94fc057c81425f56f6d376d495cae90ea75. 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/ITOGB2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6060cd28008ea6cd73de5b794c38fc928ecfe9daf402f7587e93c5b1080b3. 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/ITOGB2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc0b2ce1e90a535611aa8a2476ac3fcbef84e7f74a15c961c8954a4bb3dc59. 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/ITOGB2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15493eda983fdb7c35063e28ae9fdcc8f990fcb5b5f196effd60bb437aeb97dd. 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/ITOGB2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311deae38094679449950d26a5b71bf7b4055e3bc81c68e26d360155309b21e. 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/ITOGB2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776096ee90caf98a849dbd40e2d1c290d97c28f063685118ab7d7aa91cd59e91. 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/ITOGB2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6e9bb728be237b49e99b907eab14d6a3de2d0ac5b2fa26b4e6a279140124c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITOGB2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df793468441ac9ba6865106ac71c188ec62339c99c62ed37817f04c7e20ecb1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITOGB2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6181f7776f8d287737fb7978525233994dc5e94e340b8025a30cb98e24c9f68. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ITOGB2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da1ba8453148f4a9b99cb229047e09bb02dca53a20d4a1f11ef61a4bd52d3aa. 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/QZES62517446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70148e423a3806c18039ba753618c0b17ebe7f0979f9287c5c9360b25c997493. 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/QZES62517447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda586f1234af84f487cf8a917d4f3fbb8d792c2672cf584dd909faa546b581. 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/QZES62517448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586b65f7ac2f6b68c45fa1b49def25f655105ea58d12e1b51c5ce5bb0bc30435. 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/QZES62517451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d26faeecccb900f774aea8049150f06f855579f395b3e63e53abedb9a68203a. 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/QZES62517453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc136b17931c65775d58d7b655783f85d7d9e8f7b5d6a46d2c2efa058f7ef9e67. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES62517452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b31ce4732c3ab3fec0669a491fe96489eae9a673db2a5da1abe48e1849abe59. 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/QZNWQ2429852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74719b2e9a97b864a1821a9fe65aa91aad87e556d54947aec6409f09a18338. 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/QZNWQ2429858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9a81c0c31a340532efb92840aafa44829230b408e21619d28ba07dff937d47. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWQ2429856.