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 0xe4f144a451ed0b02ccab6942807a5c8cf2aebc2357adf75f812ee6d3f31013fc. 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/f93c0262-2537-4a72-bcdc-0b375729f4e4.json and https://artists.proofprofile.net/proofs/artist/f93c0262-2537-4a72-bcdc-0b375729f4e4.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 0x7a9c8760b91eac71f8449a785e78d47e20d65ca5e263b3634f2aca36d3a03de8. 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/USDHM1813512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df360f3272039cff1c5068fd09de95d243e06d16d47063785c87b2d0c7ea50. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USDHM1813513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e598c035afd03119c008801114710da73a88c4e35c8f2ab43bf5d3359ab6b69. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USDHM1813514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d46a8f8cd2f02fffeef98a5a523f6e39829e1b4c11deeff6f3cffd47410cacd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USDHM1813515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d146d7e99531a27bc3b72f9d3a16f8f0a3c0555f2d2fe6765daffae68a610f. 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/USDHM1813516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc477adf8c08089758d418bd814d12ea41e68ec71a6c4a2b28a69ea3d7c485b3a. 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/USDHM1813517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5b0e91ae388c72353a02b99ef58c005873d63d3222baf384c579f8b9432a9c. 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/USDHM1813518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea63ceb1015a74bc997480b41ff03e26d1a542c4db3fb9f845c5c6765eeb7b. 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/USDHM1919775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323a4fe32b87f9e8b628f20341c70028f78f309819449ff887fd05e03d8ee511. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USDHM2016311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74280662870245781183c8e885fc86b53044df602499250fd330e7d06a591e0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDHM2019485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb624aa97caa6fa6bde4129363da32c5748a2ec863c567a8e02fe7ba0faecc181. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/USDHM2026140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6987993a0258f5fe1db9596802ccf07cd7d278dcd0e2cb331f4a428888fa81a. 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/USDHM2026141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5c28e23bf796267224b0264a5981e209c2745e0cfe410eaed027fe5e646be. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDHM2026143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e884c739042ff19fc415867a0f96cf6464d007d5a042db9986f78c4e9ba78f1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USDHM2026144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f05389355b147870d5b1b524fb6311a13b10ad276168c9ac35fe9404a21022a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDHM2026145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8ac6243f1983ddc211fa4ba6e761b533f8f16a49e3232d720cbd372603759d. 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/USDHM2026146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e95326300b16ccb6d8a84cc32788ac64fa15f4ff7c092112b6c9c75107f59b. 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/USDHM2026147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9243fce54ec90848ffdac979925b4f3ab07bec45fda090a82dd97b5d018f0fd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDHM2026151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fe598368816a7088cbbbc85bb43cee8cc171c818dc53ebba58aad5eaf73f9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDHM2105895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1303a4013c3ed9c9629998747f305ecc3c6685d49853ed3176908f214b82d97a. 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/USDHM2111240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfdb757ea6f5fc7a5c6fef5634be13e030d1a8bf166f70cf49f613e4710e28c. 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/USDHM2208272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8618f63e8a7962642edea9c4e6c7f3ac4558f34a278aa47d14e7ed854bca5635. 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/USDHM2302917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0df5f1e2c7ae09bfc887bebdaf986362fbc6faa1c2c0eccbced2dff5ab971fa. 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/USDHM2308078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9897e0548ccc70256156f40a6b2107cce7ff93bb7d1d47e879e54e0c48b18be. 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/USDHM2406777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3dd9b716eaa5a4170fde02febf47b29f70cf5e7d6a76ea8775ece5ec22f8cd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USDHM2500620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab8b2179679c0440241619ff6940c92d9240ec3f6e522f468eebbda57afebf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDHM2502586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ba14253fae17e81c92ea6fd19379c424ac362b4ab8430f7611ce51be2b140. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/USDHM2503219.