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 0xe3261fb8886b5522ac1212f7d7d8a9087198c7130da060a81ff8fb67511c3680. 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/f0c4401b-1df2-4f58-b79a-1fdbaef9466b.json and https://artists.proofprofile.net/proofs/artist/f0c4401b-1df2-4f58-b79a-1fdbaef9466b.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 0x151d3b4c7b7fef9c01b1a7db4a7aef6b6d59bf797ecbe38300e68c3c5777ea39. 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/QZWFM2367989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa6aefc9089c4567e76dfdd9d739d77a7904a8b1b8a37310968da17e964b61. 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/QZWFM2367991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea444167af52cd66c9808f54b92de584c8b9683763d6c78534aa7d4d3052acf. 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/QZWFM2367992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaca1a402358eb88c52dfe2a60f6b1ec5f66aed92d3b090f256d2101596eb33. 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/QZTB92390941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ec06b40632a9e218f865aa9f4a8d0630ce97b7760b0a2396ef9a04365d718. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA82442498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fabcbf12d60cc7a8b91e0fd78805b0ea23567805f5a4596e9ef2363fb65d11. 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/QZK6H2428555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b7b2a358388f449e771f2c0ed5544dc6153556709e8e2257bfeb50bc281c53. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAT2429499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeada96c463cd691b5ae8ef8cd673d4a593319ae1c21cf6d1291b1aba1796a44b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:39Z), 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/QZTB72492215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641bb2c2d2e6d3fd0b23efb33f8ee5693154b2f85c33ca92f91977d00b2b246. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZTB72492216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158e1e6ad458bac8a12b22ac3f9132c3fcf9e67c3b089a0746c3d9cae069ff8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:27:19Z), 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/QZTB72492222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3471a7d0f9bc6f47433e020b12265bc2f9e040513a8787a95996d332083b1be8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:36:47Z), 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/QZZ7K2491393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa329208d088b4e0f6395ce9a49b1c03555785f78f0c8902914fb8cee7bc5e5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7K2491396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fbe1669d5f5d368b6ce40e7addaed0f01ed10397feb2b140d7c09d80ab706c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:33Z), 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/QZZ7K2491397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c9a1a37fbc1d27bdb096e1a4ae0ff7f3ff51c4122c2f051f7da07c27778fbb. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ7K2491401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782d9cb505a4e27629b6e3091478c6b51c565545253f520d2c8b216e0a0019d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZZ7K2491404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b97e1e82a17bf02c83cccb3003f46f3182cfc8f34efb14b73a35d66603815. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFZ32549885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcf13ce3e399e4c997a1a8260ef67b80d9da6e6bb7c1cb56c92b4c8bd8de13. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFZ62555592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b485a7c5a59f879bbb74078060d3268c52e0b37c6dbae6e21a4c23089fdaae. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ62555598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe91363baa5981d22548409b091225b5bb987c352729d3f8294f4046d3aeb948. 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/QZFZ62555599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9107ed92e79a3f193fb4fc1cccdb972888ddb37e6bde233d0e19e08e8a559316. 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/QZFZ62555603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615cd9b4b6cb37973d36853b2efa1314b800c36cc65611b820a4ac70ac4c8ba1. 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/QZHNA2546028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d890412a0e31f0dba81a81ce2637c1bb6c62f382d9b65ea31230f66552abb67. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMEN2545871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec74d12c3e53b8f866804b5f853a58752e869d0f5cca8ddbb5c116d86dba143a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:17Z), 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/QZMEQ2593456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc817043b7b509b340fa9d35134f1e385708b4eda6edd14a2b925d7dc26415be9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZMEQ2593457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ab9ee61e5e1f23cf037712bab850106582e96356eb19bdb74d73540e9bb08. 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/QZMEQ2593458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3fa9228aafb1538bf076405d59b43b867d9fdd23cbb865137daab93d9e8ffa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEQ2593459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4c3be200041b1ee7ab684d1ed0dfc3bc471988b3b858db73f983eea4a10263. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMEQ2593460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd666f7bfb198408d1b0b5aa739cb12c144fd628ab0acd029ed4376c28065dbb0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:45Z), 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/QZPLS2574299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8166de6e16bfb9d969d9cac7763e4005261c1b18f68ac18db3fec50898b169e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2574301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55092bcd551ba523f494f3b76584e83292cadbbfe7e80a52506e61dbf447d42a. 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/QZPLS2574305.