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 0xe8c5e1434b3270b1693de8c4a9881564c968329d7d944721387a45b484fe26b9. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fefed74e-38d5-4b74-a306-74952702325b.json and https://artists.proofprofile.net/proofs/artist/fefed74e-38d5-4b74-a306-74952702325b.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 0x1bc329e188daf3bd48d1c932f013972533fdb3b2f1d121032d86a87e7863b3e5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:51Z), 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/QZMHK2441816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fc07bfdf8f3c952834ff50601a2aba7c703e7b412f10354473083cb23975c3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:19Z), 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/QZMHM2410407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a497602d2da8c94f8484e75ed85ce3886e73ed78d4182fadae273f55b24fff. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:12Z), 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/QZS672467818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b274887333027f36ca3ba3e1f0a4025e39a804e5c5364e752a60aaed1b63536. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZS632495724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b980944f913f11e7ad25fd6d6a14d19de52cb13b64d4efc6544cc94fc864b44. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:27Z), 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/QZMHL2410231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9283f60b42d4347b6fb4caf9ab5ccddd293df4a5a531dd01021db7e6f45b6e2f. 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/QZMHN2445756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc0c72f40754d7acdbab6964a2f690baf8602a920b94f60c6dae822c556db2b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZMHN2428823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcbcdc705301abc452e8df6f7413c8540a3a6ed3c2b2af5872c19999ff8e224. 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/QZWDW2436121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec6908419165b169243016a4f4476a0253de55f5314d421e815ffc9be8dea5. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:00:37Z), 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/QZWDW2436124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5654565216c37cdc1206866a8bca2ee075de857ec91f788236da6063e60dbdb2. 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/QZWDW2521293.