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 0x5587130e0f07578105a78d90136e00aeddfd219c7bd90ff876000d365f773113. 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/7b520fef-9a2c-4878-8d6f-96f39607146b.json and https://artists.proofprofile.net/proofs/artist/7b520fef-9a2c-4878-8d6f-96f39607146b.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 0x66e82605c851c22af1762f028047718b36e954e67cb82b46fcff492b992d49c9. 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/QMBZ92388102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe788fce4a0f6ab6a5ac95a4b6db2e26f290cda807ba0d24824007fb783f1f81f. 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/QZHN92356471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b3d1e1e48fd9374452ba5e0e21cc7f3854f65c2f567ebc7335bab58175f01b. 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/QZES72316523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbb986d49f7ca0cebbff0e6f6dcef2596856d3d3cad5af699546e4316c8815e. 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/QZ2L61600096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b2a60585dbdedfad38bf74ea23d30f16b3039ba9926a270eb1da63b1c84b1. 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/QZ2L61600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c75ee0293892d91445d87d79bade772bdcb651c61f1005d351f9af980fbe4c1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ2L61600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989dc75ebfff1af256276d732f74081d387dabd220c115527e1e6a019d3d152b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ2L61600099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e82605c851c22af1762f028047718b36e954e67cb82b46fcff492b992d49c9. 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/QMBZ92388102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232d5a3a4a8515ca857ff66d368cea5df68a52d2cc4baac5f227f1379a5ea0c. 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/QM4TW2488826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc950cd38f369ac686d1aa1b9a6a8207147ad63dfadf255205cc2c178b986754. 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/QM4TX2431083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75db7250b8da67c7745589d469ff85e9a05e59f4f761410e2f589b292901111c. 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/QM4TX2432961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1677f4cd01cfaef8489f8870a29244b040ea1e2fa6aed0b0376584c31d27f27. 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/QM4TX2432977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d07f92539aadd0ab47f08249b06b6465784785f01fda5fc56d08dd3fbda6699. 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/QZ2L62300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e0532909bf2d3ea6d80d941c54842edcfd11e0ad8e9b0e29eee537fc74db7. 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/QZ2L62300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e0532909bf2d3ea6d80d941c54842edcfd11e0ad8e9b0e29eee537fc74db7. 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/QZ2L62300126.