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 0x884191b88c6030b2010728eb42ec6be49089ec54861bbd08e130de863199d6b0. 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/c91dd37a-a934-4905-8655-5af499f796fc.json and https://artists.proofprofile.net/proofs/artist/c91dd37a-a934-4905-8655-5af499f796fc.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 0xb20ca59a4ce3fbcf17515f5b3124a976deb6fef733a3eae2a45a6165e4576d3d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAX2466532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb09b593688717790bb8e0c9f35915c5973d41d3c43809683bee0790c3818af. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAX2468202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d033bed223675e86565ca0511bfaedec79bd7b49ffc1bd1075b469818592ab5. 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/QZFYZ2404126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff91c9ab226c74ab439ee2f280bcee1298738ce98bbf23f64acca7d2c539c6. 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/QZFYZ2404127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d2ed12f1485f4181122c069a978fac911402c987f82d587bc0f4fd7e04c22e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB72328319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2419ff493849d18bf36baf13b54d8c41f9b390628ac9261752d989ee608036f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWZ2331967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94402bdb59c731336cedfe4f335b67460261da6199051e53be6a934df5acaf17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2391443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e8a52c591eba1bbb693ed88c5527df6c2e285c54582e3cf2a710f8fc614b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEP2320820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193acf4ec81bc595ce9e3f1898e6cc94b0dca09e18f4bbeae7775b9a4cbcb848. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEP2320821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f718b511fe3306b2b9b1306a78d640b4cf03cd544b7de27db2e4845d4b1e016. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32334443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd8e4174c6b9602a7e9fedef383be5493c865fdd60f971a1b1236c78528fca4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ32334444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a9b89c804dee24e2f9013f05447e8cb69000ff16ccedbc883b159e8f3ee25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32334445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ebe1429c17536e8ce220fdab81259fd072334cf34edd0481840b89de748c0f. 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/QZNWQ2294921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43617893d13c87e9adec45ad197469d16aabc66e722ba9378f5c6a8caf1abf8c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX2395033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ebe1429c17536e8ce220fdab81259fd072334cf34edd0481840b89de748c0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2294921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f689dd5d4f231756613fe7faa1f36841ec74c279e5c0eb645814be65e5283e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ62505421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d53379803b579a44016017e88af9fc959c5fc66b18ac333a6b83bc456270de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32536507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0f17a11586e248307fa964714ff91b5561f3183be5ef329e5bbcc1e3b5760c. 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/QZZ7W2483530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b29c0b070e997e014c44ba086c9b5236572f57fbab97a4ec2e895042966c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ7P2470201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e06966facdb3a57f8240f42f6b3f8b3ad0386f7a5dc9075672387566c177cce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ782404355.