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 0xd37024b91337c23a8abc4be001a29cd31d3eaf1d3b781662550d4f21b844be07. 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/891fde05-80d2-453b-a9be-99f7c6b788d9.json and https://artists.proofprofile.net/proofs/artist/891fde05-80d2-453b-a9be-99f7c6b788d9.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 0xc5b3469e89ceb1df93eddd3dd1b7e6b86cb9ce4c43ed990be5867f5282e1f580. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM4TX2336516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aaf9fa6e2918f85d6f8f06b8c6d86e648b805ea3fbccb9845b68c00e680249. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:44Z), 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/QM6MZ2386252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73acc5df848c1a623e218c32271a409867dec7a6e5bdd1a1dd27db4201cc5f0e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P42375082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abc8269d13d305e628e95a03f7f890e79b8480e60dd13071b7d494b02d9fa5f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:05Z), 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/QM7282381439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0bf3879df490ae18ce940aebd4d87d28fc9888575b687da86609f402fba22. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBWUL2431905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a869c4b269019630649fe7a4acbd60391d0d8b6d8b3f9418a8e8b5c8e527ea4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBWUL2431907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d6da87da60b5f57483411d48dd317fe575bc2be2dff5f55290031e63aa78c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBWUL2431908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb587783ac8a0c8407365d2f552713fa034a24be804162c06ba51507adb5b0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBWUL2431912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b820600506dd4dfac52299b9bc0089d542e9f0eb0e0ef4f71426778747336f0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6N22478788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d503528b6ca68171091de17f3a72427568b865d79353eb59d6fc37f06a6216. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:00Z), 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/QM7282479252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ef58075fe3807a5934c7894bff5d4bb0580df73a9fba4bdca9b811c8276b0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM6N22545381.