thumb|right|Mount Mazama's eruption timeline, an example of caldera formation A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic erup
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 0xc9190e3c1a768f7569fc23fad1dd34eab265b76b373350ddba3705b66da6ef54. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef50025-bcee-41a8-9f13-412f68d7ec3f.json and https://artists.proofprofile.net/proofs/artist/aef50025-bcee-41a8-9f13-412f68d7ec3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rona Merah Pipi Tak Selalu Berarti Tersipu
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 0x27fbeb22bcee3805a36e2fb6ba1a58df60df3a26d1ae48eb9d5810d7ea5ed457. 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/DGA0Q2497316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e6464cc2ca52eb223b61c8a41443dde8fc144c943347a0a11e9733971f70f8. 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/DGA0Q2497317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01107a365406a5fcb64f6db3470c31a9e9f520cae062af1e26a98e75b5c272a4. 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/DGA082477586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847bbf81aefe4d04b89232a91de7db33392ad0849aecac56816a5e5f2b4c215a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0Q2497318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f7ab84868d8471d3f68f6a6298c58a774133b4327d18394985b4f822d035b. 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/DGA0Q2497319.