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 0x0b610de43ca802840a2b58e171eda7f40653f7f0c7f056d397e156b6cff8199a. 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/dcb60286-9741-4978-8e7f-b48e16f3d79b.json and https://artists.proofprofile.net/proofs/artist/dcb60286-9741-4978-8e7f-b48e16f3d79b.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 0x0b1debbbcbecc10a632a19c92e5b48a7d62841d6b5a9f41c473df47f6416e84a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNB82381640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99089ac732aee5be290ab6379f12f81233623d4b6035c605512ac8d4b8acaf9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJG52443830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac621d4b8c48d8cf5a8f66fc833d7c5b599f85c6fc37da4d6132139ffbdc171. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZLL92425919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5570166f689f88cc574bfbd93a3496a17ada86a42ffbf42c57a04bfe16d7c8a2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMV2442943.
Vulture Love Presents: The Last Zombies on Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a8d1e8ad923435312d99701ac43b4e546eac3d9e730a9c188d9fb914fac361. 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/USUM72406293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd5a92b4a7ad5701961d73ee33fe254b9d724dd51f7337a037c31f2ab965b47. 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/USUM72406302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333cd7c7a2c9b8a0d8c36202b02afbf6015b5f37b770af3311c4cfe47b1d0fe1. 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/USUM72406303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937fd554a605063ab33b9f0fba3d6fbbf3edfbf202c34dc8aa2ea7835a589fb0. 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/USUM72406300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc8b42ba0415bd9e81ceedfd5a583ba10a1fa339624e716b1c06bbb9e3c2bc. 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/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.