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 0x7aba73ccfb09b1382759cb2d03fc1ea4a012b307e75fd647cd0ac5e96d12e74f. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e56702d-9d43-4707-8c35-085caca45b9e.json and https://artists.proofprofile.net/proofs/artist/6e56702d-9d43-4707-8c35-085caca45b9e.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 0x736c01888f068acf9be13c9d00791ec8c9e2943c155797fce668569fa64e7d58. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDY41963438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52b0bd75309b9aaf1364985611a64dcc32f38db554d6606087b08f3535b8934. 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/USDY41963439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e9c0191759121885d1075b70a45a3749cddd02c9008fb1a165988db86fbb3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:53:55Z), 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/USDY41963440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b498780862221fa4ebfc032a976a6ba0a0404277f90e43d549de8f2f21150. 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/USDY41963441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44481f2d73d992bf5039aeaed22ea812bf266728f79dff8941785b78e78a13. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USDY41963442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73a9c698008ceb7c49ecc547beca93e94e1de6bb90b4f7886487ab1565326cc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:45Z), 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/USCGJ2220741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705395cd66316f78d6f6df0c675bfd8e16b31cec82cd5705a0edfae448a70f20. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:43Z), 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/USL4Q2329153.