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 0x221559a78fd8ade2f0dac845fed8b07416cd984aa39a7e1c2bc6d315ad05b008. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330a347b-5db8-43ba-a7c9-db5f5b287df5.json and https://artists.proofprofile.net/proofs/artist/330a347b-5db8-43ba-a7c9-db5f5b287df5.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 0x2e8aa7b9a722081e2cb3736e51078a2a0407657b383659f5c56180e80e07055f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6G2180007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fd41d479a444bf59f1cbda9dcc36665f503232b7c5fa787ece87394800c183. 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/QZK6G2180011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3715040df76fe0aa63a597c6aa681f54f9523b7e119191726344a9cdb8f05e8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6G2180012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b5aef3fe39dac139e02c967f12000f44a69c0a5d84382d0727e18ced75a0e. 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/QZNWS2264940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452fbabe1fa5403d47011893a8310fc2ad9a9dd260414007ae5607de3d698d56. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:51Z), 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/QZNWS2266703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28610af73693e330b4f6c24db220daf0b648b45eb243dcda0f2baa4bdcf574b6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA42387333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179c167366beefc0659502a5526257f44e90d4e88f28c11899d95be1cb371cc4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZDA42387334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb210c252577a0ffa6a29adbf37897d5fc0565fafa08767fec6f8676318f17236. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZDA42387335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9188402021f13b8ca18026cb7e6f1b3cb71d9b0fa0df8e3707779d4169832363. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA42387336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452fbabe1fa5403d47011893a8310fc2ad9a9dd260414007ae5607de3d698d56. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWS2266703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b5aef3fe39dac139e02c967f12000f44a69c0a5d84382d0727e18ced75a0e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2264940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1582643441b18ff0d683628f1fb1dfdbeaff7c8f9bb23f76ea69d9a1b180bf. 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/QZDA42387337.