In ancient Roman religion, a (plural ; ) is a vow or promise made to a deity. As the result of this verbal action, a is also that which fulfills a vow, that is, the thing promised, such as offerings
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144084a2d5be4045ddb1bf375fd51f4f05a545b61d40c47dbe53c8c339aa08c9. 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/83ff69d3-13c5-4f3d-9451-1225c1d4f53d.json and https://artists.proofprofile.net/proofs/artist/83ff69d3-13c5-4f3d-9451-1225c1d4f53d.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d1a273e2baebdf42b9f1fb03c90c1bd240d459faed2815929976cc57a8a176. 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/QZNWS2014445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb326e10355d84af8a07df65dccf3aae5124bed0dd1a2b607be537ba7a84a35e4. 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/QZNWU2079681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b0d7059b067b337610993ff2356256040ffd57ae9f7da4a3e8c69fbfd5432. 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/QZNWU2079682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf307876137c87c08bb57f693a5440bf3496986fc8ff5184180d857cc22b1e652. 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/QZNWU2079683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1316efad06b4740e0cabfbd921e842d2ed2a3743432b91e12e856d5fae3a63. 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/SEXEN1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7e7c50d5ec8a58437be8860203b0a466ef42a84a70186ca4cc2a1f03227bf2. 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/SEXEN1600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf68e78eae32215f9496d5a9e4a19a23958d4f6eabe16a8f93278f15571d3a9. 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/SEXEN1600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a9d1b662e966b0dc73f39d23b19d9275bb6a7c4cb297297327157a56318db0. 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/SEXEN1600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c5111b0984ff500223b93f29cfb6cb886593939b55b1b52d97aeef90e144bd. 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/SEXEN1600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66861a6d1896f7ce556b76eb0e346ec858c2dc9f57de9fd0ca3d4ee6fb1fda3c. 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/SEXEN1600307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c4e8077b2bae8e4c5b08e28ee12cef272379f4804bc978a84c23bf2a951de. 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/SEXEN1600308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71308a92597c1a2dfd44f91aa4b5a31c6b9258ff922d379525434cf8332d082b. 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/SEXEN1600309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbced6372380c9e4b5ae6f80ddad7dc60b48cc0f0791bc29f39e285e82fbd0c00. 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/QZFZ62196906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8402581ad8e5c95e600ea70e79d9886fc0579a4369addb7305a90d3830a9d9b. 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/QZFZ62196912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34385b96f61dd38f10f6118150a00e4c16c16cfadf3458745a0bbf3e226f4529. 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/QZFZ62196913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14741f38b1ac38cc2176ed3f48028c7a6880bddc5b86ab7a0e07a4958ea94e0. 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/QZFYX2116032.