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 0x851046c7328bb96a523cc7330e6b4b7f6df8463f85e8d18f3a3128422614827a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c30e5cc0-49b9-427a-9ce5-ca507c14f036.json and https://artists.proofprofile.net/proofs/artist/c30e5cc0-49b9-427a-9ce5-ca507c14f036.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 0x6708c6fe2d7775ebb37572792ef2dc0756630ebd98b148723a7e674f30801516. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ2174936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37658338fb30952cab18c48b96abe5e30339de4678cb18e245efb676c1dbfc60. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGJ2174939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9ceb68f7a48c248d904a3eb5b53c70aa20b665b20218d2cfa173130d5f771. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2174947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc802fafe94c07c701124dd342cd6c3010926c3ae42a6c32f8a753a07e50b95fa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:36:24Z), 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/USCGJ2174948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154c90e3e4859a52178c601500fb4214ca9d745508cd7375b32cc892a7f269a7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USCGJ2174954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a72ab0e248385970c10235f82f4bedd1ec9471ec9b3330862484f8c80ec9d3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGJ2174981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c898099cbefb6412173ab1d683f69b843a3032d41fe26b7813f0ea8f05d7a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2174961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb03d5af978a9f19f7406f320a4db92d132a165fbafaa32815c6c4036e84fe. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:17Z), 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/USL4Q2179332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241ff634bc1dc467af9ef788323356d7292faf6c7aeba9cce693d2b7f18fd4db. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USL4Q2228474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f6ca95fd8640a324f4e878a44210b45320494bc43c58d8232ae6109a9c9abc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USL4Q2228478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcaf2823b01dd586d5c99e40516cdc6b99c82b3738fb4b9e95c404909d5763d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USL4Q2228479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254877e6e2ccf9a4ee7aac421518fec39dc3586de8fcf0e915cd6e6e51b3e218. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2228480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e5a3f08dc7ba00ca3670f92cf4753eecc03ccccfe4f91c665a35e9512097e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2228482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaa5c90085f42cbd3cd3525034604cbfe25ce978cb2deaac6ec975b97238206. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2228483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3430ad0465e90f0ee6c83cb80a85102d5fe6ccfab8f09e8814e36d94173b252c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USL4Q2228484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02228a578079fe72179d2654032f068329197d40ec031a6ea69f2fb045ac7df3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2452743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1088bc604c5aaefd341eabf879d92ef1a269c3e26bdb6a78ef0bf972c5786e03. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGH2452745.