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 0x21ba0516042c51a663dc5f89a532782253308808e231a4d9e2b64e6f08fac11a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79913d4c-6e92-417f-9fa5-f207996aeca8.json and https://artists.proofprofile.net/proofs/artist/79913d4c-6e92-417f-9fa5-f207996aeca8.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 0x3cecacfde6d14325b746bb36b98b64eba50139c5dfa0ca85760dda18f18ada8e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:08:18Z), 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/AEA2Z2545530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50706f85f72e067859843fe1a9b5c479c83beb6d99715cfd7309563efcdd4bd. 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/AEA2Z2545531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab90839b59484143aa5423b0e8096f0503f4a503f26268616f4cf4f10333438. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA2Z2545532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76632f1ab2f71af8b2dfc92d6cc4b5df3de041efe6b7f66ebcfbdfb54e107c67. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA2Z2545533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b7fc571a2d6045f5f76f236748fc2eca7e9ae7ce3a1eb27a6fe1e44c194560. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/AEA2Z2545534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd0168177d661b76bc06b13be65f46de331d8c1afdda1b29af5350c5070f452. 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/AEA2Z2545535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236f2520b3e9c8639cecb8bf6fd8095de023141179466bdf3377557553cc215. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AEA2Z2545536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab44da0c3068b2b6feb02c478cefabfe91a50af9ddf223ea8dc4d8caf50f101. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:30Z), 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/AEA2Z2545537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02b114ae13dbf7a6fbb6ebdcb8bdc45703d209b237d6b0ef60a6757e7bba54c. 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/AEA2Z2545538.