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 0xb4a8144f0037c0c255e855f543ef3f1584d99b14adbcfaad3d0516f6a3d4a6e4. 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/e2f26753-f8eb-4a06-bf0b-f9c1f7b7a163.json and https://artists.proofprofile.net/proofs/artist/e2f26753-f8eb-4a06-bf0b-f9c1f7b7a163.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Album Emas Keroncong; Tuti Tri Sedya, Vol. 2
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 0x57a3fdc5ab13692cee80b35845c529145110bad7049a6e462b999e8bedc58813. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IDA130934903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa643da6437f31a3a5ee1db4483aae2a3a07f07a337e15f003d17e2611e0b83. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/IDA130934912.
Album Emas Keroncong; Tuti Tri Sedya, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a145de80d7af357654d178bb92532b163cd5ab3f85fdb3b298b9b15783cb38b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:34:54Z), 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/IDA130914508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5647f5f707c56cdf8a10ddbd38b1ba6a4dc7efcd6a76681e20c8795ecbf215f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IDA130914511.
Keroncong Pilihan Dari Masa Ke Masa, Vol. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1e18816a158d459b8356387718cbe4a079c6eac40c434bd99fe5094c507876. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IDA130918210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15031ec706ebca81e3ec7e1ab6dfbedad5ccdd9d592aeb894494168ce0278d53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IDA130918504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321991837ec592e2bc9920c6e31fda6315c4af075ceeee3c00fceb8aa1c4b758. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IDA130918508.