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 0x08f648f1f9a59912b6d7507d6e0cc02c9ae44adf7d650cbbff9ca0b052694d8f. 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/5b74d18e-7e6a-4f7e-b449-013f867f7a95.json and https://artists.proofprofile.net/proofs/artist/5b74d18e-7e6a-4f7e-b449-013f867f7a95.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 0xb6685b4f72025143f1221f95cd2b16d9b384e748d37796be6c3fefc759a6d5d6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:25Z), 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/TCAFK2145129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee849d260874d1e9ee18c6278f783337852b57641f78d0284c1e36726e3b9975. 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/TCAFK2145134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e4a65f63f875e89bcfdc15a38289398d9ce83cbcd77e98621cfb6b2719789. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAFK2145145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bd9ebb1d1048d868a04725d5c5585136fc18e5a451a6e4a6532e1e8cf8d135. 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/TCAFK2145152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8039448af5feb562774a68814fb605843fb2e37e86a76a8acadf4cceeaaefe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:12Z), 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/ROROT2302210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045177e1cbf36986c123c727a8a4618de831fd3ed0d4d0930db195720e863942. 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/ROROT2302250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b3db06d70137eec8322802dbae5421b2d0b32d5df91ebfb5d358378b83a7f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ROROT2302260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f806d4b16129ce4fe3d918f93f7d8eb775d609365b6c3fa851b2946d16f5e1. 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/ROROT2302280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3973c389e4cf4bb3bef97853af42c0df22f2bd2e52be1b5c42fd3a53faaf609c. 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/ROROT2302290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f4c47d4f541bbb38a4c591f1138d95f9119e1d48d5a7e592e460cbf3586157. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ROROT2302300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d50a331f5704e51d681aa947444b1996b1231283680eb9f2e0e284f3e08c464. 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/ROROT2302330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aaabb4a94054478a747414b45022ba58f6221448d54e0c9739b66fdc86d03b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:01Z), 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/ROROT2302350.