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 0x11847a65595b265f28690affb2d03fc24a19bd9ac98dae8d14f3bd9d15e46934. 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/6919e9b6-0485-4c26-94af-f2029822e62a.json and https://artists.proofprofile.net/proofs/artist/6919e9b6-0485-4c26-94af-f2029822e62a.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 0x40e8dd28b5593faf327d7e7d24603dea7100e5a34603c9e4a9ef28a10510e60e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:39Z), 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/QZES62245024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128d4b46ad57be64aa996687fcb3fe1b0936b0be335d3da9b8f33699d1b6a018. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHN82255958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30135d0652be546976ef9b991c4d818b03a6fa3b241a100ab55572b290ae0f5d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:35Z), 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/QZNWV2149493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf519d5cc4d8d7ffffa2d18aa43264b9f3a1e9f7589ddd9641fec673837b2c292. 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/QZHN82255959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893739763f64f900b65010f4c1e0a1c863f1f48b1f770183c48fd8750a84a81c. 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/QZHN82255960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680aa3774760e0dc4b5916cc4acc40be6364da0d5d4481ef05693aee2d620a1f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZPLR2488217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b5d2d0f7d27e2ea7c327645a0ed8216f8e595209b3450e69927df7c7d27d0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:42Z), 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/QT3EY2491735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0d38b44325164e44475796e5e7496c38c578e900e308d0f80d48005c905aa9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QT3EY2491736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f348f1d7667f63d998715ff110c6764d73a9089db4713f8761216bb091338b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USYFZ2408310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a5cb7efa25dbed56987695ce73519cc2dc44b5ac1abc495062d747c39db58. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWP2451065.