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 0xaa347bff1936f397dbb2c7d0dacbd2d57c0e148e1d2fb622d84df1bc8269d428. 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/43e6ebfa-daed-423c-beb7-8745ff540642.json and https://artists.proofprofile.net/proofs/artist/43e6ebfa-daed-423c-beb7-8745ff540642.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 0xc6e2faf3dfc102f34335e0aa430efad080a8dbb0affd4b5b00a157c88c7eb4fa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKWWT2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e6aaaf5f906087153445ebda1cbd9eb892bc2a86d37dda619a359fbe472a38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKWWT2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630bed9b31d8697c7e8e1a823cb358f1620a056a36d6af8f3651d9a24ecbdb2. 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/UKWWT2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62969b2325f3701465dc9d42c259f64e39bd6185457d07e92aa6506d7e687db. 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/UKWWT2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060737dea5fafb6e79c66a4c72422395ea915b61b54421f35e0d52f8e50b1ae9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN42453317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b22bf074ef4371ceb8ce5ec5028be0096baeefc62b34d189be09813785b825. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US38Y2503026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23144d9668b00bdec494229afb3f3437b84520dc334ded01b097a2ad606cd57d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/US38Y2507413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dddbb821030221ea3d06bc2666abbac69aaf4f978e7050c9a87d915702359e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US38Y2426182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96719c40006e5dd721001631a735b18df6e99bdf30e7115f0a3b74f642ab9e18. 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/US38Y2434301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e0ba0ca06c648f0cd69c78d4b1e6d9690bc0095011f2739b3baf6dc7fa49de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US38Y2507411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8954c2c493773e1658adbcb36cff65695808fb64e4a088be7b84a920b051bbd2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:08Z), 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/US38Y2421770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72622069783a014f20a19f419b54551120aaa7aea3a9958f6ac4ac39a6f0ce5a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US38Y2506582.