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 0x0b2ffaa7396c3c66e2c6435a974650a85c6f7a01a646f4848c820cbfbd29cb75. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cb9b76a-3afa-44c3-b460-8474d9957958.json and https://artists.proofprofile.net/proofs/artist/7cb9b76a-3afa-44c3-b460-8474d9957958.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 0xf15e488224399f76cc83a25862d4b25a3608702c1a163c9d4efcc330d5e378d6. 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/FXQ732300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fcdc4abc183eb9f1aa13cd0eec7f33dfb1c4b207bed37b2e6a07d8bd83db49. 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/FXQ732300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1842e75b6b0662cc68886ed0bc44cb37389f6e14ed065ef5dff8656cb66b86. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:37:25Z), 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/FXQ732300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37888de4a6786b8e839a329c1e67c75e65df3e9274705659bd1f7696472abc0. 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/FXQ732300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652fb58707057b4e595aeb824dcc3f6e27456bb9ffc37824374d07a97d7c6e4e. 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/FXQ732300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbaee909b92fd5a8d2c55d5790e50a416172c09ae6cc458945728f2d60b6c23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:36:09Z), 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/FR9W11901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f0db0718e4c5de8080c8b9fa6790251f96e94990edaa539eb2d4370fad3d5. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:53:01Z), 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/FR9W11901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e488224399f76cc83a25862d4b25a3608702c1a163c9d4efcc330d5e378d6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FXQ732300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be5ffe866f269bcee1bc070730e3486a6832c58be6aed3ae71f7ee10857f7c. 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/CH6541908060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff09e80cf7ad02beb05f6a2b0a5133d909da95c39ac1e5a2a840585b731eb98. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:08Z), 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/CH6541908058.