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 0x527bc4d4304e1d7574684d4e8258120811d3e020fc69a7da6b06506a520a98a5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95dadbdb-fdb9-4dd7-aa53-dd8f539c8306.json and https://artists.proofprofile.net/proofs/artist/95dadbdb-fdb9-4dd7-aa53-dd8f539c8306.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 0x9df408c7cd50c0e1345994d8545a1a7684d9a4d4d42c34d7b8e1fc0e1570ca06. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:20:10Z), 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/TCAGP2278392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9d47d7dba10460660521c3b620c7950943af2bdfc3df2bac783956e7b74a64. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGU2348938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedafa7c44e51c5b1b3fc8d77e45a6aea611b9c2579f401777abe05f5f121cd76. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:35Z), 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/TCAHD2355174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc2387637f0d5f119fab1dfbd1bc3db7c88bc73f5c381d4d221d04a9c85f42. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAHH2378564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f82277b686be13dfae37ceab413f5a31dec724ec115103ec187449c65777578. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHK2326416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe446bcc0e46a067ba29b3eb40bafeb3d762f6123b4422b03fa0d52556ac0d30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHH2377879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71073653a228b2baa79acf183b829865db06c3243b06ad1c949617f029cdf1e3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHK2374649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae41dabe8ffa5b7a990af1ac39ec1a480a70e7831f5e6ffdad70bd648e1f1b91. 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/TCAHO2378755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3a5745a4dbe4d252cfb7889f258e6a41f4aeae5b7726e33558d21a974df4f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJW2536649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf0154fb88b908985287a23b5eac25b2a33b69dfa97c0298dafd28d1a3d2120. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:23Z), 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/TCAJY2530124.