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 0x016e0d1f6f47842075556a7a6425ecf23e1f5b8f6fd4a657b354880d64882acd. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31271aa4-6f26-47dd-bd12-87480a76ce23.json and https://artists.proofprofile.net/proofs/artist/31271aa4-6f26-47dd-bd12-87480a76ce23.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 0xf042dec9fb47e3a994a49f51833ced14b1c180c48194763072bbbf0b7ccfeab9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAGG2233069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f955ceb8d53a778864bde6e0b4a55bc7ff2f440bf567d1dd3e3bf6b3700a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGG2233001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec3238ab6ee5a2b157c6fb204439ecee29a99e1e02694219c3738f744d7e237. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGG2233005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11604d5f0ba63685ecc25c8e68b36968a4d990450b91b0ebbbbfba171befe10. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGG2233011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91f28b36369b2789ae6403b0e5b8e3245cb4cf516c25f3a9224d272238bdd01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGG2233014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee8a1fb1a1d826686fbd2ea4e77bd78f74b22e2a856a42be0f0041858c9a83. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGG2233498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d659ae8c77409e678e24e2f642ef1300575ae178a0a53de82aaaf3984a8c04. 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/TCAGG2233508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ed2757ee4958d0cec8a3b77a6eecbd277ef376a7d89b444c408da4e0900bd6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:37Z), 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/TCAGG2233516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194fac940d5cd09d4911c389ab116a01969f27bf502c716caab0d5bee66b399. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:41Z), 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/TCAGG2233523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fa79d172c01419a3a14db9a71791d3061d8349ad328f80ed1f55a5dc1e4ecb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:22:48Z), 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/TCAGG2233530.