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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 0x3dad1de189cd9298e3e7fad9fbb7609d91d00ab46c66691367821d5004b633da. 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/5103c08d-37a9-4f91-8af0-3cf3e4432a28.json and https://artists.proofprofile.net/proofs/artist/5103c08d-37a9-4f91-8af0-3cf3e4432a28.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 0x3c4aee53df76b9fc44450a1e94e18f2ab1d08c4da878fbbe0485244f82168985. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEZC62207218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb76d969ce3ab990767425a97153bea06724111d6e77c7581060c052e915e3b4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEZC62207219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360dc92437f5a46b56d1bce5f479d2bdc8a3783a894011797d0490f56551ef78. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEZC62207222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb7597655603603062e0043169d5e692a9cbeff80e698e1b03b9129cff2e24d. 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/DEZC62207226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c50fefba4294dcc5ed773506d059d3ef564b7bfc9ee023ab00a32a51773476. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEZC62582075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e877e86d824a6023d4e5761a03a3346400cb45502c08d7cc9b2d340b1d855. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62586451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19753bc51ff8127ed0808f7e7f14d7c87346f17fe74ce4461903522d5ec052b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62586453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c50fefba4294dcc5ed773506d059d3ef564b7bfc9ee023ab00a32a51773476. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62582075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c03867c9010a5253018527e3fa6c42845456e49a0642f27d66e9a4c810b3215. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEZC62586454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea36e769daea111acac93e76e9c3cfb1aaf8db1541dba400f2c04a9e950c5b9d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62586455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa609e77b11bcacae87d9a032857e991f7d9a11f69a63f59ad110095a02a231. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62586456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc68607c9415d0840fa6ccbe21e46ed1da98492c54f4081b8026b5c63e388f4. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEZC62586458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf256dd1c0e58c7e7f8c12132d2c5cb88644052d224ba3ca5858a2c0fa94ec761. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62586459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b81dfdfb38df0f71289948d3cc46134d68e074ec5e4ac3dd43901e4fb5cd37. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZC62159481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced32db6e4b9635b43cb843bb2e0edbacbb1721787c7a10505cfc5619c10872e. 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/DELJ82001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a703c1a821fc4459c60b5d8eb3374ae291ef1a5a25125a3da334d7ff2743047. 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/DELJ82001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878e569c7c2029b94c35d351d28ee110decbc5e82fe646fd70113d3db4bbe8b9. 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/DELJ82001011.