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 0xb53c73e0dc8ceba29dce372af00dc1b80968a4ac4000fd18b266cc55c9a8ed04. 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/3a1e6ec3-c766-4790-a558-bfb884c6a59c.json and https://artists.proofprofile.net/proofs/artist/3a1e6ec3-c766-4790-a558-bfb884c6a59c.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 0x110bbef63de9f21e9fbd986da9b34bb8a26eb0b98a2d8e576f3879f64e3468b6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZPLR2004391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9450ab1f5deafbaa36f4306759bc5b952614404bbc9f8df5eaa2adfb748ba69e. 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/QZFYW2141930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d94c7fa942851f8efdf0b5fa74e99585516b1333f264c670cca2c1dc774f5ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYW2141935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27bb6054f51510eabc0b5a16824b8f2c12521d61209e3502b9f2cb80aee12cf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNB2197600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed8f47fa2fe5f3bc9643a7300b7a6492ba3fc843b0a3e1e0ca9ea3967208a4b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZRP52167174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c466206621041f6fef088e89d747280a9bcf92408579370ce15983844b8a8c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZRP52167175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe936a2f98ff87ffdcc3b9271ec57ca6c04a658caf4a17c1d196881618101c27b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZRP52167176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b818c9e66286d7d78a8711b66a9a096f54278b5783d176c6b3351aeae88aa09. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZPLR2197125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53adf8a72be64733c1d486220ed34370a6e36579e9553b36beb9cbdf6b9f2d1a. 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/QZNWX2176372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f85fdc7004c9cb07ad6f601f34d934591cc97895e6fe0bb73ebc1d787726a46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEKF22200880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405282af91ab39b8dedb8f238f24a36719060963d0f15fda475ea87dbff94d48. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEKF22200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405282af91ab39b8dedb8f238f24a36719060963d0f15fda475ea87dbff94d48. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEKF22200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9f333026256a975c06ab81d355ea6bcfed2a4b6bcd2e3a347110bf30894ef. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEKF22201065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec606fbedd61d6cbe889e4c28e190624d1ee5309ef1fcaf1c1a7de16f0b6c6e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEKF22201066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e70302b4ff7cd9909915c16abb1a224c41b55b5a4feed856cfe304f81e638. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEKF22201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eff5051b1b331781867c80ba3a2da107ad22112f1eb64eb81c320383de00cd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEKF22300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e53ffc51812eef8099a4993d837318198ee60e89ff40e1c8e027dc1425f349. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEKF22300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d27de995a5fd7273106a4557b31248647972a9c0b2b7920edac0416805de43. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEKF22300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02947fd4c49add0abd7f1d85d29614af030fae73b36709f4e115a13bb3ba79d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEKF22301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b6a997f12f22092e5623bef03714bcb44c9dbfdd3fe922af41ad66159ae18. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEKF22400899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47fd36da1179bf92bba15bf1bb30f08f26e795923a3f55325932c00c244fa77. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEKF22400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9362277633553f0995c4dbaf98802779b688810a109889751979eec10b034933. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEKF22401265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d18b8eeeb9f84f4e93f0b8666bbb296876926880d07ea0e52c2f88ab71427. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEKF22401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65554dc5e106422b37b9513ff140121baec459314a91b93640ee46ec66ae092b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEKF22401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9362277633553f0995c4dbaf98802779b688810a109889751979eec10b034933. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEKF22401265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cba9f7ad54451c9f64856eeb71546d21bb8256fe0e4f22973e3ffe37bac358. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEKF22401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b9276349a3208a73317160e2b416aab301bc8681a3740bfcea0ac44d4610bf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEKF22401609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1e1b0551b7a1ad0b5642418119e7542e0be3103ec9ed42f92090bed4da35d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEKF22401610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f06eceb9c819e29a24589cee3ec3b8ca06f11578a58559efca3572e2cf5265. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEKF22401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5ed5eae8cbc05a59805b1c1af3da4561a3dca744d3ff2b0143530b47f1c0f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYT32000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfa3120a8da4a0f65f2536b87f2fece5e29f251996f6fc5bfc5b0699ea5ebbc. 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/QZES72408166.