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 0x56a8fa9b74a8b3fdd3bffcb935af1e502cff625436f7aed36c758b3b32e18a5f. 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/2e642817-3980-4672-b628-bb70b61443a3.json and https://artists.proofprofile.net/proofs/artist/2e642817-3980-4672-b628-bb70b61443a3.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 0xd799b3532f39a3510eeba064e6ee546d052d11d974451b6fbd1c293c51f09d72. 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/GBKQU2080027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67363b02a68e6c3594b8aa5649849d0b8d6aac14b299515e9e76b95a0f0e55d2. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZ5FN2210452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3bd6898fb482fddf611fa3230f8490bee372dba5ec5ee9ca43db45c0119118. 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/GBWUL2298390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fec6b77a4cb51ab15e08d9404953ee4118cb59eba64a224482f9ab8ddc94d8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTV32229963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7842366aebb29f4b2b5eb4b961337cdb3b3f5b87b07133581d7b922248c27112. 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/GBLV62205330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a930857859277ada53a4ba832bc6a135c139c5e7be15d93ce2fc6d01e6d9742. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKQU2305284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b40afddf1825c47023898415cce0ab657f8e21dba9c9d5d3fca3183ab45ff. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:12Z), 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/QZWDE2247765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e9e4ecb6970e6b840c79f98357ac9736284c82e2418b6ac113c310fe70136. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:09:46Z), 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/USLZJ2345476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b88e1a2f0d297a0057dd4d7e1ebba256b4874ae0ceaa3cfc52bb8e14c0b33. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBKQU2358441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a87e225d209a95575310a5560e78b19222df49195d9296de6eb49924408d5f. 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/GBWUL2374314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431aeef020e2e43f639261bb1f69b985f4275f6763f490e16f414eb282d82be1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBKQU2387701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13942ee302e6239d0491869ceacb780e28ee2d7cd7c8e1ab51466ca9d9e48d39. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBLV62316182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b12a3824e2c28f6b1496f8ad0e43c14099f7382bc1a9b9566be8c762130948. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBWUL2486031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab33ab83eac91dd3becb3939ddf3b55d6e0b061ed64011ced8773737c59e61. 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/QZK6K2532823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247cf69ddffdb7328531632c66e3b1877a26b6be3c4d5f749b6629a804061d46. 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/QZTRX2539100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f904467f6c881fdabec6f6a9c2020001ce0de02feb169b482b584e105cc4bc1. 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/GBKQU2584366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3622deb2a9db01101e5f4d683fb7fe4a34c594d8e3e2b6df1a24cc3bec9bb. 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/GBLV62301297.