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 0x6d49c74577d4f4848def4818e04a916f1b1636b1d5ea6ca7408c5cc9844d91d2. 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/a4dd5378-87ce-4001-beed-5782d53bf18c.json and https://artists.proofprofile.net/proofs/artist/a4dd5378-87ce-4001-beed-5782d53bf18c.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 0x78148a804299d2bc8b155ba72e638e7ba264eba808b65795bcf9577c3aeb086e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/PLJ621300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b030dddee7b8f37dad5f1b09276e539d179a032a7d4e24d8d57a8ed943f92. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:48Z), 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/PLJ621300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed175983e40876eeb0010b0df6a640b3e3a3add96420ecd2554c6129a9b31785. 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/PLJ621300819.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7cc64e8d0f3e93064be9be9589c2de13e802da0aad95f2b1ae5014801cb39. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLJ621300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef2262e3d239afda5fcd015e369a20e21e7c9ae5edb2e0604db7129c8fa8c9c. 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/PLJ621300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32de65c938a19992e0d452e6129fe62be1f3f7fed0d7a65146681764fd98ea. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/PLJ621300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff83674273b37333baa7316df09f70c991f80cdbb62635e5d7afefe8190b136. 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/PLJ621300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd498d7892f238aa17117a3ff330c4e627dfad630e026a317fdfa8f7e1cbc5c29. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLJ621300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf995f64f02beee88bd5f2c9392894c4b0a8142ce27b56f7a5be7fd93d5c5d98. 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/PLJ621300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75064ed0116290348e4b11eee27c3a6e1556c544d467ee46044606da25c4533d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLJ621300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c7e767862703bb7e6dbf8bf41bbd6b66b47200f0b5141f6cb971f6168f1c5b. 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/PLJ621300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613853f25eeaaf6645478da61151c4fb80e7b26ea03063da47bc0403d046c738. 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/PLJ621300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74defbfeb8125cce702e262e9418b08f0d16ac0abd687a5858944acba5a0f487. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PLJ621300268.