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 0x9e25198c70a588c087fe76bd05d0698cd81976f47e705b7f8b9f78bc1c1357c4. 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/a40a0d07-3916-4ef0-8fc7-2c67a8d2852b.json and https://artists.proofprofile.net/proofs/artist/a40a0d07-3916-4ef0-8fc7-2c67a8d2852b.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 0x9f9d6f5651b9fce9f54853ccbf6888fc6b51e196f1e0bbf9beb52a438f503d21. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89301fa2d0891fab725b8c2b5a0cf66ea9bf5e84e53e1937d807a5b34dc6b682. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470500993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8747ccbf84030843fda82419fa5265f04e7f7736edb4d6b96918e657aa8e6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF470500995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6de2837aa09bf6eea00ae3a32ba5f5a52c506555b3ca2d98426ed8db2b4df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF470500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463fa19c5ce98c0abfc01943b2a6497166b483ffaa4c4945600866ae8a9ee35a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378d5c9539543330f76ef2b7e1172621da37c77f533e467a8795856ae5c516cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF470500998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c2cbeeab125ba152bde7366370648af0e830a2e47539dcb2465653f27faae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXF470500999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6656373a42ccd6e90b408821427b44472eefbf36d21c6846e4cbf3f2cea33a81. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470501000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa201f40d91c7955c4cf441782d1277ef29b97be60d18569a3181034a1ec7c9b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda137ed7ac05f1d8c32efa4a11182cba00469ac745139d8b49714e2af37a0232. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF470501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639fb14753089f7002c73b51f52b85364e6edc323658e647980a528dab69e165. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF470501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab03498336bcbc6f32744a1c570d3e4364542a323baa40312fcff6ce85d716fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNW72327201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146786ea4ce2a6ee2308477b3154fc5716a070b12a7cdeb3ac14fe0f5e7f2d98. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNW72327202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd573b823e6a4370916fe9b07ab155597c1d174f9afacb4a96f7fc3a2d154ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNW72327203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee9afb4d2d93fa517be7bec5abd82bb8e1f852c9a0d6ca80564b3974b49eb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNW72327204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d24dca0c73cd952bbac02aff4a3fc604dbe1c906967ae725df47cbcaf79f7a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNW72327205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d8e8fb1261065a32737891802a959784c2307dd57638e46c556a8105a2b570. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNW72327206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa833ffe0d9c7c0d73dd864d8081342c084790a8b1e267b5493db0476d1923c6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2383748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31db3ec53a931910f082ad180e87105212e40fd5f924967e29d543237ede285. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLM2383749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782adb086be12ace39b396a2f1f74255d6bbdeb1d1b498c73da6203310f5c574. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLM2383750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f0a7df50a7a4e9048a96a3788e604e4e3b7fe845d9e6bd52b693e3bd0f667. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2383752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa833ffe0d9c7c0d73dd864d8081342c084790a8b1e267b5493db0476d1923c6e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2383748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31db3ec53a931910f082ad180e87105212e40fd5f924967e29d543237ede285. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2383749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782adb086be12ace39b396a2f1f74255d6bbdeb1d1b498c73da6203310f5c574. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2383750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed66964408f9607551807b51a711887ef996fba4cbf0351904e2c1bc382a27a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLM2383751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f0a7df50a7a4e9048a96a3788e604e4e3b7fe845d9e6bd52b693e3bd0f667. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLM2383752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241c1b09f90af2747d1646012f8d2ab4b7ac7c6bc3ed1a50ac332dfa727c0bd6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2383753.