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 0x1bf8aeb89b088e227d405a7e48eecb18b088294b7dd2508d16345c9c4c407d65. 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/f28bebd0-3b8c-4a52-a914-1e25d4816a68.json and https://artists.proofprofile.net/proofs/artist/f28bebd0-3b8c-4a52-a914-1e25d4816a68.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 0x1c56173d6c1efaf238ae6c4029b6b5581bfd368990126bf0ef4556310f1fb4ff. 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/USDY42251345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8275fc575a8522289cbf5287f4331e5c974901375447f2c4e617e91c95cc83f. 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/USDY42251346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388d4b086728696368b7cbe6d8ca5bffd7192034850fbed752da85b11eedecd4. 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/USDY42251347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9915ace198354c4b7612c0c31e344f1f1641cbf57d7c6924e6a53b3c344a7. 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/USDY42251348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a60902742a532e5004f4a328b84fb83ac0e07d792275061eafc0efaf348d9. 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/USDY42251349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a6ebfc0401191a113975c1d4e0aa8535202d73d83c65ab32d09261e0362e45. 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/USDY42251350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79624820abccb9e76ba99ccc8085550335c2dd438bf31908fe3a59e68b449277. 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/USDY42251351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb164d28e0453893fe95921c8c24503c0d63090fca194b866291725e52d184a22. 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/USDY42251352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef72c8b2f18565399bd3ec885aa3348c8e7c06adbe431808f9fd5380ed9f928. 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/USDY42251353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4807592373366a0579fce09c8356a7c5cad22d32a1748e3e0464c87220994. 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/USDY42251354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e839b3602fdc0d3a3c799427f94a177cad75cb0c25e9434eea6abc9d846a7a3. 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/USDY42251355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1911e7502005e17577529f8244d4449f4c7717725a7544e19c59faaaab54adad. 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/USDY42251356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5c877165c1ff2799793259e95a77a2c1002b8765b1d2a4c196434b978a66c4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USDY42251357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558e25a05391a8a2c61d95ef30867cc69be61e9982ed93a00fbe67943cdb2629. 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/USCGJ1905015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72445f9d16f24e341078d618c92081e9f9ae9434a162ace33292e219cbeefcde. 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/USCGJ1905016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02588715f888876762e0a4d7fb10cbe1622c8fdf9c9e2b48602ec52654629517. 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/USCGJ1905017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11652f28dcdc710977134dfad77acae148e36939cded3ca826bce0fa6c57074. 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/USCGJ1905018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683b1efa5fbdbd1fbf3ef93302d1560f3a169b0706facf0ace3ff04db847c18a. 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/USCGJ1905019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d02063ec8d557cb0205f0d762a0eeb09f7808a5a955b41ac78098761a6ab6. 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/USCGJ1905020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f066c3003013e88c4e6990fd33715c0cc93f7c76454bf65799fbe0f6d93fb08. 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/USCGJ1905021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceacc48ec0527ea0ec9cf10dbc38ad6dd0a13466c7d77370dcf5c41d66fc220. 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/USCGJ1905022.