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 0x9d864f9c0ceb542b848ebf2be1015f4d64a5a0dc9482a49eb0dd79edc88aa5e4. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebf0b995-40b2-47ae-a8ce-75a19b69072f.json and https://artists.proofprofile.net/proofs/artist/ebf0b995-40b2-47ae-a8ce-75a19b69072f.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 0xc9f955bb9e3fa9f73e85d182af3133face247f162cb33fce10279e9cbee44b53. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ATM050100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91142b413d59f0a11fd6b62bd0e130ccec44bade1d1668efde5b815b0553b0aa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATM050000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253464e8e3a33ee5b67d6decfd9f5a7dc9239da97ac8a1b696f4e3bcf463135c. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/ATM050000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3217384884deb5f96aeb49b08ae64afbc99812ed074ca7c423e83b221a4070be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATM050000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ca71c155bdcd1b19e8f75bde1069bd8c405a66e06ef5df31d205f114bb658. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:19Z), 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/ATM050100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0443fcbe247dc2ae7a1b9f7c05e87b092f462df19d8ab193d84b4e1d6f8f2f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ATM050400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f769d071ebcd96a9aeb9c3c6a15391182530a6e8bdd09a0f7e08fe2f8fd27a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:27:50Z), 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/ATM050000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ca84e4ccabe515dc96e06d30aab97e1b1664c82f47d3792a16ab2ccfd71ebe. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:34Z), 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/ATV110400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0576561042fdd24c6df7fd8d6dbc9181cd2a467066b4b150f3e09b4c41ed7d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:36Z), 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/ATM050300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d78668d457f71a9752ca44a22d4330158c201bb48b6c6fe0a2c89396e2c2f2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:29Z), 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/ATM050400007.