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 0xd2341d0628ec6cdf02dd79d63bc3df33993bbdb8f396f6367ac787e23fc52786. 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/646dfb9f-10a8-4c65-870d-51c6d4eb7f56.json and https://artists.proofprofile.net/proofs/artist/646dfb9f-10a8-4c65-870d-51c6d4eb7f56.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 0x60a29c0c23930a34cf777bb21233356de173cd1096ec006985d6b351cb63c162. 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/USHM21466504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0403d529143f91360ead4bbcac83e3908c19fc8d6062b8dfeeaa40929634d. 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/USHM21466505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d462e8993a3fe293db7dd161d8fe120726c493986be4a2cddb811c4175b1732. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USHM21466506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006090cc72cb0c741d5c83b9d6a3ed3ca3e271a699e3c3efdcc49082ae93aeb4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:20Z), 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/USHM21466507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206376c1ca6f3b046448399d53a7857f6e21d947d10f87a725c016f7c887f930. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:49Z), 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/USHM21466508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90341fc43d5f4efd205ae48e00b3ba02c69c0120664ac4eb9a4d68d335cc0aa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM21466510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf5c75c3bf3c54fceb9da874a6b87b23c90ac64ccbf4a2b847274fad11e7a8. 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/USHM21466512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb11e7490c1d9d5d1402e33a0828633f4d9d3a0c2d3ef280af9f396930f0b3f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21466514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dc369c71c4d2e32648938d8ea9856c4b1be73b17dcba579a0c593745f4d867. 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/USHM21466515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353ada2069db1c381b01a7d4f2e2f18293c40b6768641f8ada95ae07ade43bf. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USCGH1704200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafbadb46d683d6f4a54dffe0dfc5d24c328d6efd421f880a5ba1aaf702a446e. 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/USCGH1704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367a8779e99ba4b5f2aca2f8ae51ceb5183e9ae3fbc4002f6e8d44668b17aea2. 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/USCGH1704202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365c6d19bd94e8845344b0b3e34676cccc968c0d209cdb8ae29d4ea7304a5708. 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/USCGH1704203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2bd05a380cb62eea7986cb15d0a4bbb922fab5b67127af29af0f7406299919. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1704204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b02ede354f85c449539e6d7db22ce163930a6606cbd0850c105ba182abf348. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:56:35Z), 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/USCGH1704205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538cebff5b0befeccdb37b75bd0441da4ccc3fb0f207c806cc22834c6df29a6a. 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/USCGH1704206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094734795509f05a4b47539dc62f9395c9da6706378da2012bf13093ffd1da88. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGH1704208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8280d0ca1abebaaf6cce07c3808195241a0837ecd9d0fb49699ed83452db1a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USCGH1704210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d1c8f4b493331737ee378c6075d8730fdea17d4d4de4d7def616160eaa4fa7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:48Z), 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/USCGH1704211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af4a0b888c962f3d017ab3bd0815258741e9a4b1f7ce1620e222b3eef4e109. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGH1704212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d458e5d5df7dc8f01deca09ccb1a593841b35b7be561b7601de20bdb23198. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN52024858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dbb4ef16d4d21ffba2791d9628a9dd9a113779205be797abd4bd6fbbb7830a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:05Z), 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/QZHN52024859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd82d453b6e66615fc7b47ec064c8e922675a898588c6f41d9faa40ca9f99a. 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/QZHN52024860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c2634baa02d54dc9a51d263e6bae6aaefdfd6c5e78896c0d9b1d8a8027d79d. 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/QZHN52024861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0de2bb80bd3cf7407a37c2757ddcdd40d31a0e4e597467efeba409e7869c48. 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/QZHN52024862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dba658bfc2ee85b9ee4f662ccaad0813d1fdd7b2c0650cbd8e6e1549321324. 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/QZHN52024863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35d7b20c42f04acf64b3c03ba8234dd3dc50362397c590af13d4120857c166. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN52024865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc52a8157ddeeef4de2641f6dc309ddd8f89427dfd0d2e6050c8eed0e8a0edf. 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/QZHN52024866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f085a8da9f0623fa784544b6bffa6700f90af27868efdda5f42afb85c58a6df. 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/QZHN52024867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9def564d5ac1d7a45694ffab1ec2bcaf47de8394eddaec08954c939b7fd787. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:25Z), 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/QZES82235145.