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 0x8e379e47b624ad3e729b26ae4bc44520817d9ff633be809d8ae7c03ee3850007. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daeda5d0-5034-46e4-83f5-6fcb36c15a05.json and https://artists.proofprofile.net/proofs/artist/daeda5d0-5034-46e4-83f5-6fcb36c15a05.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 0xb3832ae9b0ba5af0240df565ff80813c8d2d1036146fd2770207e771e0b4d260. 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/USQY50913946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f238c26975da873e44144ae96c99061e112bd3cc31e7801b8667c28de6ba12. 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/USQY50913947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644c9a72545028eb8e73ecb6e36a4ff9461462bfb9513cc2d50f87a84e469f26. 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/USQY50913948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52517472fc94fb1fa821fb4c346824ff49f4c8682bb5725455ddf8019f430ddb. 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/USQY50913949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d40d800fcd74180017dca9eeda7ad40cd813ea10a65624484b533c9b91355. 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/USQY50913950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d9d748ec70324d70527d5956ba0ebeb9cbc15bdf8627d5b754d6e54a910788. 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/USQY50913951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a6229dc3ba5ee962ac4e8a7674f16937202d38558d0c4ddb4fab9d3f7b7add. 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/USQY50913955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ee231937ff5eef35748883b55d549a7526e8dbcbcca13f8566258116008bec. 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/USQY50913956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a43bfb389955e040691c8da78b900daf2dcef2efd5a9064455257970eb5a00. 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/USQY50913957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa502fb41a4c9a22a19952a7231da12814090cca51ef545172e13cb244c8e3cad. 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/USQY50913958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2f057213ae0e6c4873ce62479068219ba015a1f99e55952f73aa5854de606e. 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/USQY50913959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe468cf0e8bfa3d94b14f95bd835f62e60a8db262091210414824352c12d03cdc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY50913961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409c799f00d49fcc28d627f9dd3f6f3de535fc600d5e53eec40ee08a4c38249. 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/USQY50913962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c37085890b120409b1a830e2bc8c9cdcb50d0d874c71aea91ec07bd2e14ce. 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/USQY50913945.
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 0x125ad7f60562513bc741437191a8085756e27e1f03571742de828d6186595ae4. 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/USQY50913952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41ea85fe5dbf94f4b84161b79937ff88c293e3e952010509d92bed43e795b6. 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/USQY50913953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4196f9302aee6b939a7317cee3d7c64022531fbe06b4a08d7cbad90f97239c5. 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/USQY50913954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261062ec9933743cc5bcd5caf6786ebae43f3459e95d10ee316633db56c8fb4. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USQY50913960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d81b74b1ffa288fa80e12d49da3bc065ac2758d75abea61a8200f99d93c3b6. 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/USJ3V1264134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbdf0ff4f69d0748fa161bc7deffa9de142b438eb014163c14b029abea426a2. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USJ3V1264135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe345037dd160749dc5c4d8815a8939f1c7aeed43293aec668d456009aedca333. 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/USJ3V1264136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1e6c3c76f3d711d17df33279c9a383e20f68c07226264b17a76e9114503238. 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/USJ3V1264142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca05e4b1225c3700d442d20cd887a8ffdd9fd3a6ebe16ae8de29c75e90bb9c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USJ3V1264146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98072d062344bee4314bb83044d901830608926b8f9f38fd764e8a6fa84fe6c. 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/USJ3V1264154.