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 0x810ce7e35a2222a6d5e9ed617fc16722b76b43217e07dce061f60983abb5bd71. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51716f50-601d-46a6-9352-4f3f8e07a054.json and https://artists.proofprofile.net/proofs/artist/51716f50-601d-46a6-9352-4f3f8e07a054.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 0xd6b08876e6b68f255c6335f800a41f467e09c69c52486024955252d027d1baf3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ES75E2201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd9e4050b8849d99f409362209443f7e4797ff4e972c8b048203d882b7f22f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES75E2203717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951f8b866492fca1ead440b0e57a1162fc06486c0bfe3ec3ff46541f4a3a1d9c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES75E2205482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab079d2ad97ce69cef20d3b20531e544eb9f1b73ea16bc083df6a0dc4442c337. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES75E2205723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab1b366fe4c64520fa975255ebce7782e918ed17f4f49568f1be13d3a4a1e39. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:41Z), 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/QZGLM2398318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3271cf1f79b60b3ff7921454105b21adf86ed02983913d81e7637127b03a868e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:56Z), 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/QZTVM2393475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75be1d82fb323d2968874d5ce313bd8210d36282e3b856c5efa5e9baac853f96. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES75E2307870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb990131c47692a573dbc048c2bbbb214791d078a51bd23076f922d9d55da9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES75E2403447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32226106538f29e6ff3f5fabc8bf3c39fe9af6f33d492383874d655662fb3ebe. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:14Z), 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/QZMZ92459191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7e85af86d89cbe7dc4cdd2074cedc58dd9342190a725fcf87e360b6e44c8b. 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/ES75E2510061.