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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35472c539e31fb01e80e0f4e124f9881aac019ea7a2d4e649336f4e95ffde71. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e1eb996-5ab4-4fbc-ae8d-e03b384d7be3.json and https://artists.proofprofile.net/proofs/artist/0e1eb996-5ab4-4fbc-ae8d-e03b384d7be3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603132d7e40aaad5f7913d3ebd8bb7768b7c672d9b5a9e41728f63450d19f57. 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/USUYG1151269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1fefac4ce8f8c7058a160da60f90d0eda2cefced39d0b8b8a8b431b5e710e. 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/USUYG1151271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3022a12deac34bc16e938201d0d52134d3bd76a6694ebfbd82b3c3e59d0f4ec9. 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/USUYG1151272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3060ec16151e20c97677530a840e9fe7a1f17337b09b91d27f64b5b9a9bf776b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:12:17Z), 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/USUYG1151273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01742923122d5150b2e97165f64ef990cf89d128d1a3ece8ed0f7bf9fc18448e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USUYG1277985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b54abc437778450cff0945bdf7b15c40965fb632b6e1172667d187b257e600. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUYG1277983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66a98240c78298db8f7842c4e8d386dc36f875dd0f34c01de03105a4631aed6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USUYG1277990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce9d36f618d83fe44833329e8e20bdc38c1030786adfadeeeb31a83c373b427. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1349758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c175392db18a25a3f3b73f77ab5fdaca1648a3918e3df61c60a9d536ac2661. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1361161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0361cf044f575367c71c903a9c3d1365b31e71a1e69af4d310acc20f960e2f. 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/USUYG1371470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a9fd101f80ccd33c8eea7f6860171d5cbb6a962a8d628c771b666780cc17f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USUYG1371473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e5dfd35fc970675e4392a07e4d26c63338ca4406888679a489f6114cadae4. 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/USUYG1371474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927c090440531bc45d29556e3193235ce5456478d3896bd9cabadb4dbee2142. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USUYG1448221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e09c8c0fdfa1074c7e5a4e154da0488dca25b08a04508af640b06ac481889. 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/USUYG1448223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f0f117924ee5dff0cb123e60ac0968792f186afd41eb30ba2957bc6453d4a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUYG1448226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce5b1ef74245a14071f76b4d8ef517604bb7cbaeb5a2e5e7a41be04a0f2b6c. 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/USUYG1266481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26432fb291282e26ffbacaf3963b210c71ad3af2ed9137172c032b37c33560. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1319469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9def4051787d441bdb9058e4cd7df3f994671deda9207b7ef03b27abe0c33002. 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/USUYG1319470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f7211db3edf87473b636d15070c259eef155d8696a75a9bf7bebe009d5c3a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUYG1319471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65196d4999d58ffce628760ae09f6513ede6f865cf5bf92ada3f9a93fec2cf96. 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/USUYG1319472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ba4bd49173bbb2aff395d3a0767f1dc00aefe1e10436d99e07052db2320ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1319473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb6229499bb5c21e66315a891916de13cd13ddd59c805a94665356e9b08632. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1319474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10310f6313711b1e9deed9b986292dbf150da30aceb98d414cde8bcc380215ba. 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/USUYG1319475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143252e14eaf57b4293afb551ca128c89ef9f5328cb7d390cb1d79de03ab608a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1319476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee52d6594a460eecb3f02e8f4b4890fa807bc52684995946adeb680609fc869e. 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/USUYG1319477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dc9b47fc9d70bdc687358733eeb85c0990a71ffbd3b30f32441b8b87f6ee6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1319478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29572d50e16d64e513989e3daeafa94f383d7cc5a2217901d9e2ac6a5dd3ba6d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1159257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cf1a1f607f98a206ebc80a1b925f28378cb9e8e7fe9a5c0c01103db92e01fa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUYG1266483.
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