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 0x785da161d0334143a01525864e52ffc49d6388cd58dba8be41fc2e852b2a2ad7. 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/e7a0517a-9195-411c-b91a-2cf0fe37ec28.json and https://artists.proofprofile.net/proofs/artist/e7a0517a-9195-411c-b91a-2cf0fe37ec28.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 0xbede1e5d7ec21c583db34d3bd90a52a6fb47956364c1268e9c4b475071cc3333. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TR0650702003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7d8d6f919e15f2b50355a01dc39f7ac730169ec07db5b286120be56a085748. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TR4851300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c4249e446ab740ddc109c331742e25f4402e791123e0f49a40c1b1b74dda83. 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/TRARJ1500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b7aff2cabd8ac9c1c3e53a87d3fa79ceaecef3c4a3e790c1956764093fc2e0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TRARJ1700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02780f29d7b7fe5704064e9560d088be9939476dffa597f44e8c2771f081d14d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRARJ1700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6fcf5f1aa7d5e04f668dc48a01c992144f8e6893bcf269926490e8135c06d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TRARJ1700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872914a2ed0c8ffb8ad29f276c377d4620b883b9a57eabc1a34f9c0ffc77ad2e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TRARJ1700289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae5b3501ef90187b41f9f7a22011b58c48cb4d4f2f7abe17d25ca208eb3b953. 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/TRARJ1700296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e918c74d8edf5363e06ee34dbe7279dd9fb9fb3db79fa4b71879f820952f540. 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/TRARJ2200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34efbf17deeb45e5a74d8ae9cf4291af1876149b90d65b1a98c54e13d03f2521. 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/TRARJ2200854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb3561908084fae3ae832d651aa7651a19c0725a962193d366b9ddee0127151. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TRARJ2200855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b221935cc01a248a1f545787623ab1fe3bbae8b59efc365831b73407abd142. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TRARJ2200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0323d890c75a11d28d5c6b4063571bc62215174db52f587a29ba04e270e8623c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR0240600576.