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 0xde4778026156c3ccb46a1e860d3c59306f70da13b532b8cc9551b13a0fa832c9. 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/2d88b70b-832c-42c2-bfc3-186bbe066c88.json and https://artists.proofprofile.net/proofs/artist/2d88b70b-832c-42c2-bfc3-186bbe066c88.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 0x9eee741174ff0a47445581b8b236c676258a2e7579ffe49f29f5f41d913fadd2. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCADU1826592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e874f160a9f30ccbdbd16448ded742b9557512e9e3c726c7b91beb61ad8bef. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCADU1826593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8dea68289b8447b4146f42b59e59a8c3f4bdec0f279e4865c435de1143fdd4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADU1826598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80513a9d11dd15ef3bcc3a112805f13f167fb2861d60b3510db1bb05e9074393. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAEB1920817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ce70cf187cbc3f14d734bf016beb9947e537356d95077bf12aa6df0b7d679e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFO2197567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14885dec457b2f8f06568517b6b0076f57403b2e6d3039d82daabc5020b9628. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/XXIMU1401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395131526ff301590e5b652a34b099c8d61ca7961d57318d5f56ca0643012933. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/XXIMU1401160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85fdff60f8a5e8c578b150fa4d1667b624656c3e584b92a877583ff3aabb65. 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/TCACX1737237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1ffcf4f0a575a28d79f3e9aceec156687d1cc5b7440818f1b490c6c014f136. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:55Z), 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/TCADU1826085.