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 0x89257e41d08858ef5cb4c250825456063034b3ec4c390c38b25b799a08e74a50. 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/91baa569-ba5d-427c-af2c-b74963c73e68.json and https://artists.proofprofile.net/proofs/artist/91baa569-ba5d-427c-af2c-b74963c73e68.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 0xa0c513d845140252955a546d90adf584eda465c2d41342072a03445e5f06c64a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:16Z), 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/ATML12200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf786b01f47a907d296a9e0696be94b9a389dd93cc39527d6330d1c155500e88b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:08:45Z), 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/ATML12200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0116a48c9783192d4859f69c9d6232fab9b7699570623b53cd6884ea6585767c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:46:48Z), 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/DEXD52400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333fdf8f3283ce8c8cdf8284b3bbbf73b8a284a2b26c4d38abd7eee0d51160a9. 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/DEXD52400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422d26f708e0b3efa221521d2cff873ec09d01a9407730ed1a4e60b4440a31f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEXD52400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a58d10a204d8738bc1c52e5e010717278956efd9f8451d83dc24dd7f55c6323. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:24Z), 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/DEXD52400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234052d8faf7aab4b1edb7b293522aaf77807e39ff75c9c0f0326bded061b34a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ATML12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5300b76e06dd66e95e53e866fac2454e914f7f90f0acc77243be6bbc9cc84b2b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ATML12000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f9c101791516563fe0d6a64eaa1d244b11ccf496841707a71eecdab4c016b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEXD52400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422d26f708e0b3efa221521d2cff873ec09d01a9407730ed1a4e60b4440a31f. 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/DEXD52400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a2ab0ced408fca7020853fa0433cb8e33063d9b0ede5288aca5adf6c3a411. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:18Z), 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/DEXD52400021.