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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad4985fb848768fe00f00ac81416f424abb93ce3fe96e6b613ec2fab033a32b. 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/77e0de62-e66e-4094-b544-474a7a287017.json and https://artists.proofprofile.net/proofs/artist/77e0de62-e66e-4094-b544-474a7a287017.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vulture Love Presents: The Last Zombies on Earth
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47346cd4ba159c46d75792a926aad00c6ff78ed2d644468e852c6895541f147e. 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/USUM72406295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ba87eaa3e4abeac7380194ced7ec6788ee094d6bef868c0734855ca53f233. 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/USUM72406256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20771d18b14717f4283eef392c557a57af5edb8cd9c6a70c418457cf9b2f6b16. 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/USUM72406294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd5a92b4a7ad5701961d73ee33fe254b9d724dd51f7337a037c31f2ab965b47. 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/USUM72406302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a4ad6e5bc057c011aef8a6efad35125a43e67abe977fdfbafe28fbb1fb0da. 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/USUM72406299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae6f393f7701c2e37e882d2889000953f8ba138fe64ea78f96d70c4eaabc86. 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/USUM72406291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cce2ca2f18204206a062a955e19ca4ac1308b79b0ab9bb43a82cc017c88430. 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/USUM72406309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee65fa61ca0c325dd494ca08211a05b78b044244467cca0eac83714ff2611a. 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/USUM72406298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722e509f2af485d0e084cf222b04153e65baed936b90a2e8470375c60dd2392. 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/USUM72406340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3ed674a49858292d19b990d09ac3180f685c9adc215ea20aa300073284af74. 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/USUM72406310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333cd7c7a2c9b8a0d8c36202b02afbf6015b5f37b770af3311c4cfe47b1d0fe1. 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/USUM72406303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937fd554a605063ab33b9f0fba3d6fbbf3edfbf202c34dc8aa2ea7835a589fb0. 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/USUM72406300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc8b42ba0415bd9e81ceedfd5a583ba10a1fa339624e716b1c06bbb9e3c2bc. 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/USUM72406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b107f36b78a50ab2f1928825100254bdebc7d14fc928b731689460bb637b8f3. 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/USUM72406296.