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 0x7205c07f7606141baed9dd9b63d7451dd408664d465d6dec00b23e3e3f4c2fe1. 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/2fc5e340-d84f-466d-a2fa-159da47030f2.json and https://artists.proofprofile.net/proofs/artist/2fc5e340-d84f-466d-a2fa-159da47030f2.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 0x2841701dbc4c5d67bb55f0e8518a2864449b6be28ed63bfcb51d111d69183475. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ESA112446632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7113b63bfec6b9554712364e2a5b311e9c392ad5990fb3e176cbbddc5d7f1021. 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/ESA112446631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f27d9402f5b5e4819e8a8d387fd5dd9271b32acb0b9b503c8bf1c864c9b3307. 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/ESA112448174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f57c8073aaab8324bc160f6d3533615bb6006d3e1506a9ad9ac399ad67201a. 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/ESA112450030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bae3c049329200cb2ff8a6ad78b35750ef569b08b9d8a892a3194e80c40d70. 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/ESA112450546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc817b6ea440e760a9321a6dfa4ad71abcd5d97ff71f9f5eb2590f641f9041086. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA112454264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e19a875a21cf31c8bf8b2e372d6cd188e3d2c26e9b3fd1569b045c3e3dcf6b. 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/ESA112558137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4da669ec79ff40a46992d75d424f822d43d7f731177a7d0887fee97b593790. 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/ESA112561295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594e53b3812e30dbb3e032ce06c3704c7acef4ce652f0b8b6dcadc8fa62f1c91. 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/ESA112561296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe3104e9b3856b2fe59dced89ae61e5cab6be974c5a46cfbf538dcd605b505. 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/ESA112563411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb380811c717e38b3353ee7fae7b99076329b7423fcf386a17ecdd7ae19947a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ESA112563500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a6d2327829d3f4f98c89a96ed20a9a9732bbc950f196573106d4a294307f33. 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/US3DF2566494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef65f303b3139ec6625634849fed918ac15237d4459e014a963da9f5280691f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2567251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f35f4056f0d2e47cc4d2d4db63dabd17c5cfa8d79658f7aa47cd51e8c596c8d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US3DF2568231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45143b23bb3e1eb3859f14d5622cb7883e66851ceb291048640d7dfeb97b6ad. 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/QZWDW2561463.