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 0xcab8b996702ecfb6f5be5cc7681ce74c9ead782a0b53dffe6e4542bfa554a2b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dabb7ac-6f94-424b-a75a-7dbe5b4fcc2b.json and https://artists.proofprofile.net/proofs/artist/4dabb7ac-6f94-424b-a75a-7dbe5b4fcc2b.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 0xe2d073303d6935ab6e00a2082ee3dbf61b9f4b1e0b95e1b6983ff4e05285cb46. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR6V82589179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4213c5975b332ac1d8aa1eaa1b102012a88e441af86276d779c96dd05a89b7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:50Z), 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/FR6V82589181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5406f5534998acb6ad7cfcc667d1e54abfb2b8706463f95b8fd451fb136f69af. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FR6V82589603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ec1219bd8d8db513182f09b2a9494e5bf5c2d50278e4c3244057bde50c9cd7. 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/FR6V82589606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e16677d926df371a2c07818039a108c8b09e0cc4b509f7ab62fd47a183b67f4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:26Z), 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/FR6V82589611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66404add6c7cdd32ce5f41d9fb445faf5c7b495840f95e5552030530be0cc1e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:56Z), 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/FR6V82589612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1cf02337ae5083c3806cf73875f2eec44c7225eeb3fc8c4382f2a45af6ca08. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MX4971533539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf032acdb2e4a5c42809d1aefc1575b5631a44ec014622fc2c0ba703ca92803ec. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DGA052567964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8655797a57da35eafd946cea1f50fa6cce8a4e965407600e99e3e451784ae6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA052567965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a93aa88ca875ee00a6b49f90b739552d971ca48dbde678ebe3f3705d6fee072. 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/FR6V82591708.