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 0x3e6a77c8b5815952a66a291372c9330e13a91bc07570577f82dcc227f88ebd9e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30ec6820-e354-40b9-b2ba-b8738290b9d5.json and https://artists.proofprofile.net/proofs/artist/30ec6820-e354-40b9-b2ba-b8738290b9d5.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 0xc28569212b518ed5f473327cfe40e69e872f81ad7e245d0ea539e8d297f368d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USEP42411002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c80e99e5c22d4d82f69759e7fb9b7a59598701d82e7b57f4fad93e3878d788. 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/USEP42355002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e188f96b365c5948aad50a9e376f2f3f78a2ae9fa516922f42106d0e75690be. 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/USEP42411005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fd5a04283377cd4c78e05b2af615100a38ab9c8a0c518dec18e23826da274b. 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/USEP42411006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9008c2f78c582f6f8f3c716a897eef59e4a637b269992782e67f865466c1fd41. 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/USEP42411007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de99aa92a36ad2e48f126577f22da53d17b80a0cdcbd73633589690f9323bb. 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/USEP42411008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28569212b518ed5f473327cfe40e69e872f81ad7e245d0ea539e8d297f368d7. 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/USEP42411002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad95ff3bda6ede01d4651918435efdfe20b0a2895173eede32f214c913ca1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USEP42411001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e269e3d14211b35aaad04ae9dbd68efedb26b79f6ef2d5c8338f53aa0b75638. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USEP42355001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad95ff3bda6ede01d4651918435efdfe20b0a2895173eede32f214c913ca1f. 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/USEP42411001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e269e3d14211b35aaad04ae9dbd68efedb26b79f6ef2d5c8338f53aa0b75638. 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/USEP42355001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68da9baee6226557fafdeb62473ee48c3637a1b2aeba9baa185133edd55534c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX2341001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf8eb7a0379a3aa8c0e34f8f9fdf40627b9f69073e103c7be19aa7aa0510f87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2341016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6b801d7e6d278f4c63a1d00d0a1b85a139c094829ee59b24654e3962889e62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKPL2154644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db3da7298238b6cba9ea1cd33a553d60046f65c4eba77ed1b83f9854629e630. 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/GBKPL2157069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586c302efe29318247efd24381a243efa28990274acab62e38a972614170bf1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL2171017.