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 0xb945a7050acbc4aa86861c07191f8314fd4d603d1170628b8b21e999457133d9. 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/6986b0ec-3b93-4d57-b1c6-cb4b78f49c11.json and https://artists.proofprofile.net/proofs/artist/6986b0ec-3b93-4d57-b1c6-cb4b78f49c11.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 0x2c6729a37e52a3dfd27f0e712469008c202a26aca50fd4a7e8d84c5d8b61f8ad. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:33Z), 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/RUACR2301919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6b77818b74767c3955d8099c28e08bb99b06e113e0105fabd1f0b7b2409bb. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/RUACR2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a53a246f33ee93664ac1b5cc8d817e35d65258c3437989d641235eecad14eb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUACR2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0afefca5b2dca973b0d7ee8f73f92445ecbbac095c0021e7c99a8c06a841bbf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUACR2400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0375f2672d79e5e43b6372d5a781bbb5d05d737b1f88e5794ef9336a18089ea5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUACR2400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8690b8e84e1c2a94ddd307e8a9a53345f4fb3fc71d94095d9475c942d4b4fafd. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/RUACR2401780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaaaaca9667997e814cc66b664c73bdf63b444f6ad62818757f00fa2b56869f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUACR2401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f29c745c3834c88d9bc2bf2e7089a27ebde9df59b18215f313283a5af25d3a5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUACR2402222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6695733122f90327e8f724648ef272a7a9f8587d26b76f4e71056a3fe3ae1aa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:52Z), 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/RUACR2302466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d2c4d3a20700d3a96103aa5893ca04e1fea52153bccdc0afcf30870801032a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUACR2302465.