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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5ac31b5c438ddfbeac64919ebe5a451c7a3099ccf31cb315582874d09465e. 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/13b40fb6-b505-42a5-9295-4402cb50c7dd.json and https://artists.proofprofile.net/proofs/artist/13b40fb6-b505-42a5-9295-4402cb50c7dd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620907dbdac9c328ba2f2de920c8de4d386d43c9564d4a33798ef21b9225157. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZANL1709763.
Dan Hujan I (Original Soundtrack Film Budi Pekerti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44baf741ecaac8d5880a99e88bfb23ff09cca1895cc8a4b9c492050838bbb7d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:04Z), 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/QZANL1709765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307d1c044c4b90c0b5af121d814396feffc80bc91fa3b12fcf9165eb7572752d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZANL1709767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c98a0bb7f061859d41f7343e7d3d8edab93e3071d131295bba9a11fb3898cf. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZANL1709774.
Mbah Wasis (For Wasis, a Documentary by Ima Puspitasari)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aade456a945857c8eefdbf0c1a44ae96f0ae1877458344c8f04ae2490043e4. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZK6L2017105.
Musik Dari Sebuah Foto (For a Photograph by Kurniadi Widodo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0d00287d83397996616f1fcc059cc45f453a2ebade2f29d2340404d5d0952. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZK6L2017106.
Tri (For Lemantun, a Short Film by Wregas Bhanuteja)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d51a69291afc6689f7f94a694ea443a62619976e3a8ad6169a49169e7b38e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6L2017107.
Senja Di Batu Caves (For Rumah, a Short Film by Yosep Anggi Noen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd892c142ff4f93c5bb5ef9ef7a795080705b41b3f725e55393eccfa953856077. 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/QZK6L2017110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86913312aa62c093cd34a3052d957768e8ec3daf87e28489e2a77be9639d00. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZK6L2017111.
Stars in Us (For Posesif, a Film by Edwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1547998166584ffd57bd5871f387ad6df0ddb285c81250be285185a5a1a9a712. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6L2017112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff803bedf190cdeb924d575cad7debcbe5912bf325af13ae5f5864e43c66fd9f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:23Z), 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/QZK6L2017113.
Urip (For Lhprh, a Documentary About Peter Carey by Subi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04276d286c6f80e24eeb0ff4955deb8ad33364bdcc23f7aac7d1798cdf120856. 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/QZK6L2017114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30e3f96f934cfc33aa37b58cd141dffb83f86f0ebc14a8cb0f7916658a92a02. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:10:43Z), 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/QZFZ42298411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c3da261e3e51ddea3a628ce69dd143eb26f3502fa57d6893457ac654c070e. 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/QZFZ42298413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2ce22831473724166f272469f0c066f96df1008ee52efaddff3d024c0c2bda. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB62418475.