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 0x7176fbaf8c1b8dc1286952d5c518ca22e15cd2135828ae879d791ba78d300ab0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d0a35f-455b-4c66-bdc2-e52209f56cbe.json and https://artists.proofprofile.net/proofs/artist/57d0a35f-455b-4c66-bdc2-e52209f56cbe.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 0x1b46e9f752636485e99192d8976a49618f527504e53a9992c5f159d90ef54f66. 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/QZW9L2295420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce5fb16dc0f83a3899615ac8aec3c5fd26d2dda29bebc63bbdfb16835a5afc0. 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/QZNJY2152071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd94c794217d2c826556cffac591481e980e5374d97ac05679f5cbd01ce7ec2. 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/QZNJY2151964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce97be3ed5afcd8bd5ef099280ff424b5994b922d46b17399a2eac9323f26c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZMHN2216526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32efb710a5467573d3634365d357021cb057b976f6bb052e4306040477581617. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLZJ2416596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9442072ace92595a25694b78faddbeb2ecc25dfac63a83dc85030c88c4974a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHN2305897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fb620ed9496403f506b49ab76801f67f21b977eb7328426b021403884ad58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MX2319345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9865f2a992e38129110510a0febfaf16df2e3592ed7545852b1acfa3e5b4a06e. 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/GX89G2386795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0f7bec5ff1c803600945154562a4765174b4ceba714ab9d191ee67560ebcc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2493895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13edd9c47ab835f4711a732ac093624b141f53f04ef57c2cfcc657ff16d3a28d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812414483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c78a5c5e18e9287ce775b869072f395d25e8241564cf3a7284f94fe0f045d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CHF032403729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505dfc89c319764e98e327cbfa6b1aea6f9fa67350f7c88dc885e25fbc2df6da. 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/QZMZ92124753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c23bb5a761042a305e85f8b3b3cea3adc441a94d67530d30df25f6f24caab47. 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/QZGLM2337829.