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 0x23515fc668ae21064fcf6ba99c53cb6e5f7238225aa07fd6f40e0baf9d3a4d86. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5904a8bc-a769-4403-9d66-16a4508e9e7f.json and https://artists.proofprofile.net/proofs/artist/5904a8bc-a769-4403-9d66-16a4508e9e7f.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 0x3faa77db3753cbdb1363e9c8e598e7279e82051a901a44e4296ee62acd515430. 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/QZYFZ2350325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa77db3753cbdb1363e9c8e598e7279e82051a901a44e4296ee62acd515430. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZYFZ2350325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcf4a1921f69af12d265dcc4e2d8a4186a8cc3a5fa5953fb7473120c595dd46. 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/QMEU32307150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f157918ed2b72515ad9a7b3278186af7a62fbb3868c9cb71804b90d1675ac7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMEU32308822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2146b92ab858437244c384dbacb749a3d028f11b6ea69fb0d57801379f30503. 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/QZWDW2322299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d0010fed29fcfde1249c5e03c3be9e4e9a53987b91407a77aebf6586f45d4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6P42319102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdd3b03b8558ead6c7bba35549e9b58255010c1409774546964c5f7a591307c. 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/QMEU32308874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc142e0f6001dc2a02262a005b4e8bd74138de53fe51320e520463466600fb0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZN882355905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faa77db3753cbdb1363e9c8e598e7279e82051a901a44e4296ee62acd515430. 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/QZYFZ2350325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cfe296d10830efb1c9c926d94b6543a1badf6f039a4a3b69f242f319a50ab. 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/GBWUL2212311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff1895af0af2637682f942f340ff8af5654057b82c1139a33daf7c3f26381ef. 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/QZYFZ2479124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea52edde62d5526dbb28f76d838758abf2fad89d4d6b4ba2d29b68fc8b16601. 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/NL8RL2459627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bc6895374b25508225a40e24fcc01f0ac4bef541affd2477335dc323da6fd. 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/NL8RL2459628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c021a86a07a5c975d8cab06ef9dc2ff93c5d23df2a4c23083714408806acf5c. 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/NL8RL2459626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81e15fbd380ea50d29fec2b16ff3be977aa20e0b7508395e510cc0ba3ba6a24. 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/NL8RL2459630.