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 0xdd652bc6b14db3413a1fa9984646473c9c4887c22f76cff1e493200e72aa1dad. 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/47be5902-5a95-49a2-b7fd-0fc502971504.json and https://artists.proofprofile.net/proofs/artist/47be5902-5a95-49a2-b7fd-0fc502971504.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 0xa74f46fca969ce084a09349a164455aaafe5bd7b05732844608141ca20547945. 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/DEA622001432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088a9b14292c13ec5bcaf02a3247c7cd7ff7027588787be8ee04850bbee4f90. 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/USUM72313546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3355ac4dc6e915acf831372e9cbfbc041eac16454c6aeee983e951f694084d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA5KR2190814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332bf32722518f6476db0030bb8d09f56bd928716e64680680bef7da099c9fd. 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/USSM12006058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332bf32722518f6476db0030bb8d09f56bd928716e64680680bef7da099c9fd. 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/USSM12006058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332bf32722518f6476db0030bb8d09f56bd928716e64680680bef7da099c9fd. 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/USSM12006058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd5f201c04bccb6bf0c40c6e5cfddb5ec9dd5d7ba99d922956836167b61dbdc. 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/RUB521207463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef6287a1bb59d7106daa2da76a07da27c05a59ddb89c914d02d4f16c566f17. 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/RUB521207464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b6673eca2cf9b1a1e8563b0b11c48fcadc8860e532416311b97aba5bc2890. 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/RUB521207465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728324169de9c6a0a93391d92aaa60848c3a749b1aa9111cdfcabca3aebd2a5e. 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/RUB521207466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bedfe7f29a27d4dc0b205003b2f5bce4d108de94175eaf34da49db78bba9aa. 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/RUB521207467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9398c8de7f23c4ff1afa40b859fd12924e325b7583c0b409a567be7a62c26. 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/RUB521207468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b6435ac586aa86df7db002196c19f8ee8e0a4fbeb391b546803d9e138bd1a2. 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/USSM12103970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4656f7abc2d50d3bd5451cf0c03f9353ad0a9d849fd44d4740416991e6502dba. 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/QZAKB1910665.