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 0xbec8bd08410a5b2c396b3f3a505a161632c9a48b4083f8c5f7db1de9e0105099. 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/fecaa751-a24e-4c3b-869d-1447a90801fb.json and https://artists.proofprofile.net/proofs/artist/fecaa751-a24e-4c3b-869d-1447a90801fb.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 0x271891b299cf042c12a7c641969bf35fa8a6035e23ca6440073075dae3afa33d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLK670500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1b0512f18beb94f72823287988bed675d3d13abf767b64d2635fa74e5ccb92. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:50Z), 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/NLK670500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba51d80bd8338f1ddcb2bf6b81ddd02d6f0d806635a23fae09ab9a30fb504f1. 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/NLK670500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874b57afcd2544c4b62f3d8183f24fb38c80ffb357ee9550013eb639c7d701e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NLK670500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88811f40a67afe5a628b6da50f9c77888a3e457a88b675bd14551f7a1f2f0ce. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLK670500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e371b30bc948d9383b8fe37938049b6b0d9c4052337a338a20059c90263f93. 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/NLK670500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d46ff07e3c94ff056d71c7b8b6e884894cc24703dffb74078f909af8a8b8bf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NLK670500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57d1a19b642533fff4408ae9c41e67eda0df6e249abf39cdd02f05cd397ca87. 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/NLK670500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72aaa17a3fd4de41820800c9e1caa6989d044016e1f014ffb6108265b0895a2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:09Z), 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/NLK670500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd270e4962cc099a86a3614578cb2b3e9203c0f0c6481f7233e1e915de7b63ab4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:51:38Z), 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/NLK670500082.