A voicemail system (also known as voice message or voice bank) is a computer-based system that allows callers to leave a recorded message when the recipient has been unable (or unwilling) to answer th
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 0xbf93bea16a8c5a137fcaa4d89745e391d6afbf5514ef9544fcbea2f137d6c66f. 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/f4deaddc-8215-434f-ada1-70c8f9d97826.json and https://artists.proofprofile.net/proofs/artist/f4deaddc-8215-434f-ada1-70c8f9d97826.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 0x40c56bbbdc57b9f0334b0c391decfab365183f08201c9c70d7b01e2ce811c043. 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/USVPR0511132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeb8166d39f1f7423a94724cbe8036f46b7c5ce50c89497b807505ad6fdfc5e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:46:27Z), 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/USVPR0611609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c55bc7a121afd9afef3ee8cfe8c628f6b66b738417ae6bdc1fab779e68b19. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USVPR0611611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e501bf55337e3fc5550abb1475f5a6cad94bbea93cadd90bdf3b95faa4c24. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:28Z), 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/USA2P1252447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739797aef4f0165fed1ed6225c301525e03075074bb4e9fcaba5e8c1150d60a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:00:48Z), 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/JMA271805273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a19fc4a8ab8ceea2e04c58fcdc33941d596f181ba5d511a1d097f448afa6c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6P41806613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a19fc4a8ab8ceea2e04c58fcdc33941d596f181ba5d511a1d097f448afa6c7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P41806613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5fe9e94329420a688791fbc6145efef42b5dd0a2321ff266be12aa80451dd. 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/US7VG2469871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f110cfdbdefbb68fe32da0909452303ea6323d333d91e8ddcdcd3334e0a2f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA0R2457653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078dece325d740298bc1b39c478efc638e5ba1a9071712df0cb23d35b3f3c50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9K2496169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5cee2034c14665261070207dd6b97e4a0a511a7f74d831b7b831d97ffacd3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZPYN2554653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6cfa3606831365513211b64a727a5b5e17462066ba240c1c44d0a236adcd23. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6MZ2511891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d60dc8cccbb2c85c26202e0ef92aa058894cdceaf61a199c97035f5c275ff. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZC62580365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cccdfb609a1f9980795905c65d271b22f1007f5a58e7b7fbcff155fb8ce5b4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:28Z), 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/QZGLS2577588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377cc841057e39aa9533f18dc7cdf64b8b223636b197b9ea0d2ce83684c17f0d. 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/FRX201951098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94c3c2dd2b91e74c493b9f2f3256e65c7faef10efd2f8ab1bde6826714d59c. 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/FRX201951101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d546f6b68f82fd458b26d2981b92af93027b433bc3b6aa7d8b959a794f2bfec. 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/USA2P1117692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab0addc5919a261b7f6da5ce9db456dc40f4ac2ad1a88bce38ed34316841d4a. 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/QZGLS2456292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0a4bca6a5c34eeeb60c8a1a388235f0aa79fa13c71c39b3105e4703f824f4. 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/USQY51582137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6124e3a678056d2b3d769c2a9f0400dbcd7409c2d93a365b44a8607862ed2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:56:45Z), 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/GBBZV0752495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d3b5887035c2ffd0fd04eae99aa632ffb2d8f7f8005f06101d0e93b87d68f. 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/USVPR0611547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857dee589e85e1e714d1300bd15415ba395fc9bc1093618237d8698e39b740bb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JMC711110768.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch