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 0x883cba4b8d48be25e2db84ee318f95c3c8ba17ee9fbf64e21b2ef90b83f1f551. 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/689a4b17-6a67-4cbe-afa8-848d57309d80.json and https://artists.proofprofile.net/proofs/artist/689a4b17-6a67-4cbe-afa8-848d57309d80.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 0x515d5cc70908e60509eb40407471f6f146ebf0e49d4628348ffcc2d9ce506daf. 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/CH8092302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5f8cdb889338174c77fda5d25dabb83b321909fcd8ed56dfd0692170d047c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH8092302162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b92da039d0c155cab0d0ce6f121753d2d9d2ac1c800fbd2108cad58b386f6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CH8092302279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ff4b266b7e163ce7eee5055b10bf30cd5c40bd0d294f523bb0c29756037350. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH8092302278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04161f762d7406bcb887e4e3dec3662ff4df4c755e614c4f0fd523bd0f58c3e2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CH8092302276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75982fd2b76b785ea07b45ef5df1880dc4cfbe5509fce5f6295844272837732. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CH8092302163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572570e7abcd98840c245327f60ae5d23fe8e5ff11c2f2c74dbc1c573ca9f409. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/CH8092302280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7edbcf691e15931baf6ae6dc094ca50536a16dbd1a5a7876a080bcfa258398. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CH8092302282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d36b34d1b8e0a48cd0071d23c00bb13579f4aba03cdddccab5dc855e3fa381. 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/DEG442591362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9736c7913680849d45a93d15c46c6dd3e2ad6ecf062371f7f32db36e8d2004ed. 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/DEG442591363.