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 0x5dac09d37fec5bbeec9b3f6c3157033805912628dd4f0ddbc788a7e63a87cf84. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f36798e9-3796-4fc1-94a3-513a1d415156.json and https://artists.proofprofile.net/proofs/artist/f36798e9-3796-4fc1-94a3-513a1d415156.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 0x5616c48263996c1dfc3e0a444527215aea60f4966cf91a289e41ad7c4430c7c8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:45Z), 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/UK3AZ1821778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660e8e137290579573b28f95f6396ab3a875b71cd3e639aef912c7d39f7a9a19. 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/UK3AZ1922730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc012342207b33e80437168a129ca679ea7e9d6ad9cfb49ac245a5f09287022. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZRP42142131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e8be7b3ec1e9e3d201a06f75a60e15f48f1c150685badb23960bdfa95f4878. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:08:53Z), 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/GBLLT2218998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43caea343f74c9e4f85676fb761154c3d36abc527cf24ee6ef03ed2585ece2f4. 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/GBLLT2219001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c706e0d2de260c606bc23596f5616b2278501f12adec373d73c92fd54fac0b1. 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/GBLLT2219003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f05d27602f4c0a3e114c639c1cd818b8d2b3d749e344ab11267c19fde34ea1. 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/GBLLT2219004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67384c254e6935aff95fe3913b25b4ddf1273a814879cdcc9a39d35afdd8b0db. 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/QZQAY2341505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b073b43427d489cd9e41a1f8fec65a9f051cc48b4197f6ac4d578e4fddbc26a. 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/QZWDD2384353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad1dd46fb1f743295f8f4fc042a418917a6cdf53cee82d5009608b03919821. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ8A2407284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7790278ecf6eba14400f95e3c6f4a376c2b2a4494f6b58a8b5565df46c5d2b6. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZ5FN2571519.