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 0xec96f6d7cad90c6fe57a966b5d0ef89c3a987d105c8718aeb7e45acdbf45ba5d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49468d3f-180f-453b-b8b5-9a3931ca646e.json and https://artists.proofprofile.net/proofs/artist/49468d3f-180f-453b-b8b5-9a3931ca646e.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 0xf1d49d627c6ea1fd6f58cb059eb8069b2e5edf461837f8c7126ae0990fc81d95. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFZ22465565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16952841432c924e9bd113511b3222e448908ecf8aae70b60b0320c943ce6c1. 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/QZFZ72420681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8363b00c478e414d9cb5ef8ed8e236279c744218a0eda3e9ca4f6e2b07f48d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72420045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1641b228f2db0b7d07ad621b2675dfdddc07544b0be8b04bbcf2507b0db3c3ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2470132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618bbb5c2f4720cb3f0b80fe6eb07edb2a07aa2b3233f2771add99c854dc882. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTAS2401625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9a082be0e73b1d2676c22f2f17d7ac83a808484175cf3e2cef55f63dcf85d4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7L2423029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4282a3a38423f2185b0b9437476923621795ad800ff028844f8f935bb47de34. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QT3EY2440335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb307c69c5cce55cfd1796059fc87d9acdfb80f67bb30c06b429b89d61d6a1428. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN52520890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e4e6a0f320704f2db15e709d39742f2a93141dfcbcc3a87da59731cc80b7fb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAENV2525587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8b40504418d9ea9b76a42e0aa8b6e64e1ceecdc30af43c1c8b02b155f6a948. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CAENV2528552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969a2da85d2d5be82fc9b0a7b4071e17f448857531dc3b32672aac07078da703. 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/QMFME2544489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792527cc40d008b6daa7d5dd4c415ddac43df86f18eb8d331f199f0f63fd5711. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2544490.