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 0xccc14c3b69b00285247228371e70ec8ac532faa8408f0a5e20baa8e748400f57. 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/246e30c1-0045-438d-b427-e5427f5b7f1a.json and https://artists.proofprofile.net/proofs/artist/246e30c1-0045-438d-b427-e5427f5b7f1a.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 0x5c3462afff9b94cb98f6ed8f0708af1103d8b143deed77e3014c7c10ce10a832. 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/QZC5T2300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b90f73150a3f092be510e3a04ba5d29cbeb3bc5e33954d43c832c5ca79a24. 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/QZC5T2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a86b5bcbb3f8b05002376e7ca0c2073daaf083a203e7b231f209a0c8954a85. 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/QZC5T2300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235680f60b38fcf3953e8e4783fa9997e5db3c59d004ec58625761afe5d9b7b. 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/QZC5T2300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c6396bfec7c02cc7a5bf7aa201883ed529f2b5ba7e0ddc63cfa79a36c313f7. 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/QZC5T2300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d68ab39e7b4025e1b96307a484e55b0fb38097959d10dd3a8360cd4139cdb0. 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/QZC5T2300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ada9069f0900f9453a3c032f01605a327e17779de54da510f50d77328657e8. 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/QZC5T2300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bf29b9e50b8f5c66dd6f29a354585ef7f1f5b9dbc9f024eb5540d9a846b3f9. 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/QZC5T2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437984fc994dc729099df257d201ff052cee129b9f17b3e47e49f21efc7c2814. 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/QZC5T2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05257df22135d4c2955b5abf3f85984da1eecdf081a90c932085881c1fabcf4. 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/QZC5T2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e641419404d33aa0d6311e8e607c0b2c1682f750676531f464306efec58a93e. 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/QZC5T2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8497bdfeaa7d6564c7db353e763ce218fe54456ff1a8da2ab783729462407. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZC5T2400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d6e3681e7c788b55b6df8166c94707c0fdadbbeead222b5bbdfea30102361d. 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/QZC5T2400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88173379acfe3bcadbefe9735eaab0338a491c6edf25ecbd3c08ed814e16f55b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZC5T2400241.