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 0x9baa50ce89bffab935265a63c99a5c01050cc3418750996e088a7fd0985a4fce. 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/6a41c427-1766-4607-807a-ae80d615a1dd.json and https://artists.proofprofile.net/proofs/artist/6a41c427-1766-4607-807a-ae80d615a1dd.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 0x1a6ac49c8e89ce461557d0eb43441e6289bfe47aa99546ab613c10431f8d8146. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IDA130918301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399074f78327df103234585349822ffee102c4dcb527c2e3a6aabbf8c154ffc8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA130918302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44147a1764dd3d430c9ea9ddc6a016e940128fc86b2f5277ce804202a17b4dd7. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/IDA130918306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc534c81a7e8fffe4b70418a62aa72a5a6831cedb84a0b63ea0e33bedce975b54. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IDA130920301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aafc6238f906589089b3d9a4d96fb59ca2f34a4b8d52f9211f4d14374bee5a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/IDA130920309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e814c0c7a0fcd856b66474aa3a5ae30c6c45f5ade61ba0914646619a07f5f8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/IDA130920312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6034b7ab5b31fbfe75d6a1cdcd6f48fdd7f901ac249143b7dd26403601c83e0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA130920313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907a47b5d7ea720450c5a608b4407351af4835230e1c83332455a63d31603782. 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/IDA130920801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a51278bc71136e6157756d8c4806b4a08642e96956e0dbe8981f424071bd86. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/IDA130920803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace66e14eac682e9687e6373c3d0b74bce818527b7b81e81b3f48a8386b6909e. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/IDA130920804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce61f9edc1e580f54750c70c301dd516cb59ba83cd4b8be8d617359e272d50f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA130920806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9383e128026a2ab5ce741be4b92fc16cf47271ecfd047c81be19e0456a17054. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA130920808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1af2a6bb014d1d5dd45a8e0028dfa98de04d79294edde3461d546a048a791d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IDA130921009.
Keroncong Asli: Sundari Soekotjo, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3c3e5aa2e93918ba02a20378dc56424ed07f4e2543498c8eb77bd37f0612aa. 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/IDA130923402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772d9f77123bef71cb1cce206099b378e29e29ed7cd7743b98217ad7e2a956f. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/IDA130923403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc959d4dab1576a37d8695dbb3214d46b2d52a4d9d1a26bddf5326f4476695f3b. 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/IDA130923407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24278b2e80f7a9296ca55500341456e5b426dc224073ff23b7ddbfb933945db5. 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/IDA130923409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070e88415918636263ab17ce5f699b27533522a586c131a4610818102537c2d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IDA130923412.
Impian Semalam - Keroncong in Jazzy Mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8999d6366b0e40827f1b06d233e2df4208788be46974c5a80078727a4d2217. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/IDA131400201.
The Best of Sundari Soekotjo "40 Tahun Berkarya"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704f478569ff70d25da58f47e82a9a5d888646d663f9d05f694029f386cc2c96. 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/IDA132002508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d29b4f1e857653a3c01ae3742959b8c5dd0474ce2b27196a846e00edec3c97. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IDA132203101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dde636579e5ceeca07e72305108084dc38465e09dca7606ed3cb9d2ab82b67. 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/IDA130906402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326ee87f23af6407228677f30a8e9f4d42016dda7bef375f5339dbf5d0dfcf5d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/IDA130906413.