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 0x8333b278cb5a0aec5efa2084eaee7b51dc8ce24e24a34cd0efb5e40ec10cfbec. 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/671ca214-14f4-4dcb-9aad-903a978fb3ef.json and https://artists.proofprofile.net/proofs/artist/671ca214-14f4-4dcb-9aad-903a978fb3ef.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 0x55a4fd8cff8067399d5d55c56036c364e076642931cb4569c0547afc41453580. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IDA130916503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d14ecdacc65aee27aae6dc27ac2987862ad8726513de440810fe223dba3d228. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/IDA130916504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376074d39dc33f61fcac1eac7f875b182d7574aff4cb9578da4cc443e8144264. 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/IDA130916505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9fc4428ace20a935e51e1269c74035454e402930bf39d3002154314ceed7ec. 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/IDA130916506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24546bed7a3e519a14e266c63707a61c70300decd072157e561f293e9a36e2e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IDA130916508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01016002ef57f7901a0d8df5d2de69abed9e25b2a8434737a70f365f7259079. 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/IDA130916510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b6c68ff0b986f95738e9838696e7ac8d99a3638a6faafc23faf92a72d1e401. 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/IDA130905804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b4aa90ab770a36f5e02da7ff633c82eeec91117779f6fbd4ef63541633e6be. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:38Z), 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/IDA130905806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c02e15c8b8b10d007eb1e3f6bf6d535fcbc4162e6d382d8ba283f4b517a3025. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/IDA130905809.
Lagu Lagu Keroncong Asli Bintang & Ratu, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ab5760453b6db22f11382e299a0e1c8ef1c2b1f82a5aa1dad7daf885bfa92. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/IDA130914308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f886a95476e668b07d8e217c6137328ea742d4bf59e32f7a40b7effc4083c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA130914309.
Lagu Lagu Keroncong Asli Bintang & Ratu vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fc9b5ba010209165bde8f1fb983fba51a9e9b85fdaffad771f8cfb921f2f93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IDA130906403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32269b214ff31303fe59deb4e36d178973202619363c6dd873323e57036d2d1e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IDA130904009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a62be3f7e62b69b1fb01a8edf791c2db950892ffd379238562edbb8b03cbb. 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/IDA130918509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7263cfce8a76857aa23fcf9ca35f76f6d12a60cee9bbafb4c7623216329b7c55. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IDA130906814.