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 0x43da1e9e63f439a7f02bac3135d87a6a87d0397843b08377a631e68bb5d04b0b. 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/281112ef-3037-4af2-9c65-b638b61776db.json and https://artists.proofprofile.net/proofs/artist/281112ef-3037-4af2-9c65-b638b61776db.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 0xa340b758ad732f3ec3a131b8b5ea2a7263dea4cbf3fbbe3f9d98be5cb591df79. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCACR1604386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2195181e080719270a93904757482ebc83551eddf1c23517124d826763d2b961. 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/TCACS1608846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecbaf51e381f31e29bfba74d11b50ff235161870fa145ce8e12f88c363f45e1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:01Z), 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/TCADD1746138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1498be790b65fec06eeea5cd5deebe4a8c35f9cd21406628d9fa5e988294bda. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADG1740469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aac5e97f6d04223c5403c3f78f4982926470ca8a9e67cb219d21a20feeade6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:56Z), 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/QZMEP2056625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876500458ec8128e4edd387825374908fa88e5f8677e3c582edcfb6770f84960. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEN2336079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbc814037689cfb1e65c6318062f7572df4056a8ba14254a8bc765355e862da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:26Z), 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/QZWFR2356161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042ab8a8501acd4550984dc4a8e5b05a8f3f390f44c04fd07e08a5673a386391. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFR2356163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02702abfa30e417f765d0eb19498b441138681f754fa146378d3430f64596cb0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBB2363837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051e0045122946d365f0d7445cc1ed48ff38f3d00c6d0d3490a28125fe69f8d6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAS2444760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5153e9d96e287d7aa4bf98f72e14a5502a7df8610b4cd01a4b240a5937b47f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBE2489124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83acc1c19fa3b82e3a78940b0544c9d2b6aa0810bf2886545c384627c37e8c4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFT2497123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b697da81c706025676a979c3342ee3713867d19f47d951388ae05d1ef1915. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:37Z), 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/QZFZ72535155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a80764f02919ed0c407b61e75cf20ba2824088bb5b6684bbffbdaf7f4f36981. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN72508837.