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 0x1254f8afbfc68af275a19d914824350c7aa7cd2bbc2db41d83c9207fbe7f815f. 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/f80ace04-4db8-4cda-86d0-533984d095b7.json and https://artists.proofprofile.net/proofs/artist/f80ace04-4db8-4cda-86d0-533984d095b7.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 0xd4f7fbf22694eb77945f2db20b2e3f651b9fc2f79e8a607c1d42e4bbd492a21c. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:31Z), 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/TCJPV2363582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff35882b6f8247af4ebc42eb06923766ce2d0cceade2a676757aae477a5aedc. 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/TCJPX2321595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7c654c9da49d09ab6e7e409a9fc29376d80cec4715354d9f2d2dd2cb436e9. 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/TCJPY2343799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360dfdffde6eff11f2ccb9cc80dcc851dfa016e8cf5c80da68a971e075d0a6d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPY2363803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de96c6e3bc1b5ac647ce1828c8ca63a3e9f2ae8e76a898be4a6c6d9eff24dd. 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/TCJPW2301093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f4072538b10c780b3e4fc6f2fa8226430d0fe594fdbc67f24ff65b1a062c4. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:00Z), 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/TCJPY2364230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2020152210a7c2950a82aa4e4618821eefebff2c71420ff81c18ad3a800a9805. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:55Z), 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/TCJPC2444924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2e0309fe2a2be5be20a6fa2c34dcec35835b99bc8dfe4e2f6667436d9fe71. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPC2444978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d61e9fe98cab0a54b86498cdf4a210c228c46f70a310a650612a837c6c6c93. 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/TCJPC2448568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c074c4560cb756772d9772e559e0442dc4806af9df743676699feb6b18b865f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPC2444987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fab5948b205b8fe9eaad3f3603dfb24fe8857ef578871d8528ceab99c188a8c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT66J2584887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1c27fed90f818126d21b48a0cda0bb5dd7ff0a7551dec11fa98ba1df24474. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QT66J2584911.