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 0x733d6625c53b7260666d9e38edf2404ba8427a53a0d5434f80bae38f4539242a. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bbc2634-5fa9-453a-97a6-c7796cfc412d.json and https://artists.proofprofile.net/proofs/artist/6bbc2634-5fa9-453a-97a6-c7796cfc412d.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 0x32da755177dd539790d96ef38681b43b614342e0064df11cd7418189706a9dee. 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/SE6HN2274466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e1068da17de5ccbda2bbe297db1870d47105a48a1ed22aa291e155111183b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6HN2274468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf260db16d1fe7f6cdd6680c3e2297effd64879a8af39efbe750460ed6853569c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE6HN2274472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136109342850e2c092212f12fc0365295f84ba291750bf0c8eea0067ca5506a0. 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/QZTB62247455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b7680657d678c92602fc796d67e7cf749ed8f8b9a11a7c74a71782577677f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBC2448182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596e7e7a33ed2fdf4efcb8207923de55d32ad08bbfa96bb286080392361eb993. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7Q2495119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b495797138886a9e9daeab9a710f09631d01b322f3fd0f57012181b2da4d1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:07Z), 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/QZWFF2510278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f87f1381a40e1d7168c75e2d23c236d370b3f87b9ded8ef482426964e0e0a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:01Z), 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/QZWFJ2580657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9913b6a897ebdde2cac522fb8a440d4e2c3f7da817240c9a926a93a3ccf56c2a. 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/QZWFQ2596728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe961d0ec52eee017131e10277e055e9e5ec09154866327fa13a1e8328fed0c42. 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/QT3F82588987.