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 0x3d2dee589037df5e9476206cb0ebe6a0df8e2904cfccf286eff6f1f7cf5e78c3. 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/fb96aeae-f457-4148-8bb8-79a0bd02a2c6.json and https://artists.proofprofile.net/proofs/artist/fb96aeae-f457-4148-8bb8-79a0bd02a2c6.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 0x3eb1c471b5760eb709bfe76f89aeed1d895da1e03529f523f47384ee1e9b51bd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:20Z), 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/IL7192300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefa1ecb7b28f82fa7d90c162141a7fb22721a5d660df884f7c1787d00702f4a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:04Z), 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/IL7192300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c99eda6eff7611aeff7aeadc6d406cc7dd6620ac0be65e95b8aec62c4ff6ab5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:43Z), 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/IL7192300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4a7b37be2b305df63b29cb2896d07325a8b9cf95f2dce9c91057c1ddf70a4c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/IL7192300727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd981eb76fad3b338cc984c98bcef0b5804c267347cb17b4a5fcdb48d61142cb7. 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/IL7192300754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8f8246c4e92561ec631c85083171f8af65c045d7ba8a409447fc5b4a7817c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:02:44Z), 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/IL7192300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a461a3bbacdaa561b9e836b42feaec57f533bfd19fc1b3c1186262227c21ccd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/IL7192300762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fe497447da5255429adddac1a95be8fe5ca4f7ddcf0e9abe106b947acdb269. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IL7192300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400cb325cdb3847978acd898cd2da064373d1f817b9300aacb0deb6c4606cec5. 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/IL7192300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784033c502b5ddac56a5f125b0a5850fbf735028e7c0d16a76dcda223d96a7a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:20:50Z), 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/IL7192300689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e331b24b69c6e551dc8336a5d0436ea4060838c479f4740fcdb9ce0b4fc7e4c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IL7192300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc9161b0550bc304a6bab4c3a07b22724f4d6bb0738a78932db9f4e8307250. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IL7192300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1573182fb0836c2d3a91d26c11ea6477696ecaac46a4dc0778f49bf5d4a39c9f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/IL7192300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3956d3a1be729cc18b4529419cb18d08e5f7b7e163793443a53f5a4ab026ef0c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/IL7192300712.