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 0x1ba1f3ba95fb4a17f98680aed5bfbae0ffa13699f3a3ba9e6c8743958184907d. 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/77e8c3aa-bd19-41b8-accc-d1754ba98675.json and https://artists.proofprofile.net/proofs/artist/77e8c3aa-bd19-41b8-accc-d1754ba98675.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 0xd24b89605dc9eec2bea1435ef8dea5b6fae9fd906021bf7daa3ae2c888676a03. 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/NLT2H2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37174f787dad32b7b950f5b2e4071cec7b437ed03f9cf1ae312d0bc6a642af. 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/NLT2H2300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a5cd74af373b21fa47ffec198061fd435630cbc8194136c787f73b7660a92a. 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/NLT2H2200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f56e0ef4eea0e88940a8b02493fbfc9062d472f6481e62b1352982b563da78d. 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/NLT2H2200524.
If Your Girl Only Knew (Marcus Layton Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8417a1e5170f2b99a57f7a1370ccb72210f8cdf2101ccdd93dc2f723b8e0a60d. 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/NLT2H2200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cafd0a369a0eb21d9ea80790a53fb1afcef479faf6821fbea0794e43834c5d1. 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/NLT2H2100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800d1ef7600d29af6e4385efaa6ffa6761e13d6fb26b0a862cd1c54147809dd3. 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/NLT2H2000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf55dfc29024575e14193bdefdf39e37f6fd29492a2bdd313ca8edecbbdfdbf. 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/NLT2H2301235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37964d7c83f4ea27f18de74caf066ccf1369fdef45f6f5db775bdbcdbcc53510. 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/NLT2H2400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c8db21f6daec0a840e7140e5be47508a13398672726f27c977f22df4a9d4b. 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/NLT2H2401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f8f34e6f716599a176c1a0d1951f38fb0f3005136f66786ec6f5c2b37bc440. 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/NLT2H2401313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4382cc68dcbd7a02e2c851a71d8fa5321a6c0ae6099ff667093e34976232984. 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/NLT2H2401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dec0551d974c122a5752e3211d4b963d3e1cf4526cd2a75cc144150dc29682. 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/NLT2H2400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fbf47a560e35afbcc2fbf166ab4ec858586202321a44c6f813f9907234d40e. 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/NLT2H2400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8842923ca50fbfd3930f3ea7cf96e9e5391f36c87c5ef1ef9549104e12debb. 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/NLT2H2400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60088165bd1a04211af2add3a373099ab6336f54c65890ef84d4efd572a795fd. 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/DEQD52300031.