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 0xa8e410d70732607356268866c6cc90b48d0f1388f31eb6048b1d64b94506da91. 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/b79ac7a8-23ed-44e7-ac86-0e239e86c153.json and https://artists.proofprofile.net/proofs/artist/b79ac7a8-23ed-44e7-ac86-0e239e86c153.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 0x6a7c74e323c7b5523b55395f70da153344d142fb4636897e7e6742dd405705e2. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:01:56Z), 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/FR6V80758697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0111c5ad7065c45875d3292b9321f9c51b2c39e2242625780e3d22e42b0b6522. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:01:35Z), 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/FR6V80758698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f79a29263a09c4a30f1c3c638f8d188854b9474223749b421129543212ce0c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V80758699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b2eb3cce8fae10cd186f6f66fa2c93a942d113faa62f4d5ae07a889175ba6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91460500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e930b9a2c665dcf02e9f6c8f9e90ce7ae65a07617bafad7fabff7e2e7b6514. 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/TCADN1824414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b9c062659137e224bd1328aa6f16128fdac5a4816d0cc49e585fa35b71298c. 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/TCADN1824435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4997b2f210859416e1969ff408ba7a129cb339eb2288e58ad99f84ceb3b971. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:18:01Z), 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/TCADN1824459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e0ec44cb14cf8d4113965dcdfe685a880130e614b1b8f43acc316a5ad930a7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADN1824494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5dda3480bb6097021c63d1efdd59879a49d92d8ddbbf8de8c8e93b78b59bb5. 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/USHM91460489.