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 0xc6da32aab655587d87dca7f9e9b0289f987b6ed0ef9127bac7bfecd13758f3e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aabc3469-5917-400c-83c2-f9f9d7c4cbfc.json and https://artists.proofprofile.net/proofs/artist/aabc3469-5917-400c-83c2-f9f9d7c4cbfc.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 0x0b06520e258df9f030f4252761838828d4c208582f0fa6e9e26cde647e25ac28. 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/TCABZ1448659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7f78437f1d2b888a2ef2f96deb59c5b93abee3c8015c46ac8c30ea3fc93e38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFM2154788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce65d3409286ac20195e944f3e90a9a13e3278da5eca259d05431b3ff4dc9b1e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:44Z), 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/TCAEX2013641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457c86d162598045a2a6206ae420554e1a1f6961b44d7bdba1fb7384900320c3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:21:42Z), 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/QZK6J2198111.
Say Goodnight (10th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2642b02d13666ed652bb1c10ac0bc21a1b220a0433094fccdd92104b1520f6. 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/TCAFT2126181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250e188f199a02b85c845a7d7982121c9424ee23d83d8642ebf741059423e8f. 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/GX53U2081267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32766c1aff63fa091f2ad59bcefdea44c53b62d140a9620a2e89590cd1eba9e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:47:30Z), 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/GX53U2081314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f0eac39e6ddad2672f5f4d2c23934efaa0bfc817591d42f68bf3fe37146a78. 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/TCAGQ2207992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f1336d9cdb99a2f59950fef4c7b8729d8459cf0aeeecf30b3b74cc7213282c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USDA12205683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383ad369095d278f5fd2f428134870f20359bebbe9e96d8fb68e4770a269956. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2318481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782c7d690ae188f3e5dabc8ef0465bf1624ff184dd92962bd99716faafd5e7a. 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/TCAHA2323641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9686bff0c0fd1eb499453e777be87c6844f26ff5e460c49ea34b5c41811cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6J2337699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36d2c457bff628724e4f6af8ae77bf51fa50f295b0f8731bd2194dd768544be. 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/GBLFP2373237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ac0268b16552a6b07ec2488a4bfae39775b233c7996b093b768bd671914ac3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB72360937.