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 0x871712821ec40e3f86443a3bd6c4928cb6180723d3b13412163a92f746a670e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9be7418-5b2d-47cc-ade6-99836cfea39b.json and https://artists.proofprofile.net/proofs/artist/b9be7418-5b2d-47cc-ade6-99836cfea39b.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 0xeb26cc03c21870cdc9aa1e31f45ce036b7a0761420f63a36e2df91ca6417059e. 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/US6R21357699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fcba7cc7fc8e7c9109a74c94b0cb90c9de806de2c03a637be988ba94b48fe7. 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/US6R21357706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e535927094ba038290d6616ce0a9b6e6437734951b0d3f8f19ffca413eaa56. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US2BR9701394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec7653c61cc81ac5e0557bb1aef70e8b1682b1f8a0b393591a6f6230497492. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:55Z), 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/US2BR9701396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f747f13e0f86b03bbc011940826bb9a04a1e98d16aa05dacca9fcd4e98033. 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/US2BR9701402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59acbb0e29a3db8fb23080ea912b9fe43e04dfbf3b9ddc7e4b4a1751175423a0. 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/US2BR9701403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc766c566ac49ca20d3bf38964a18c902abc09b103413c3964785dfe03fd668e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/MXH312200924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9d26333350dd4514f0e09a932a0e04eb4fe9a359e6c577fed3acd30cefc792. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/MXH312200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c447e586a755df06dd2a9d0fee9d9bf6d3631940eb077bcc180210266a0c78. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/MXH312200915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858b664881527b5703e548fb3d6c1ef58c7eceb7f40f2e62e2557c2f4a2f7fb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US2BR9701392.