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 0x4faa0353d65ad45186bf5c8479e0f540fe3f866d90fbf8f4951001661b95a348. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca92976f-191e-43d9-812b-72d6a07e88b5.json and https://artists.proofprofile.net/proofs/artist/ca92976f-191e-43d9-812b-72d6a07e88b5.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 0x6611b52814bf7b4669227bb7915020e82e49fdab60ae33f692c38fa8652172ee. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:34:15Z), 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/DKXY12000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f052377ed33697cef3dca7a7d73563e17701a9db2949839ec2df6dba332c741. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DKUM72000581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f052377ed33697cef3dca7a7d73563e17701a9db2949839ec2df6dba332c741. 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/DKUM72000581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706b251e78a26f8ad6e5f3b33eb70b20d883c2fc3ff6d26fc326defcd3cc071b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DKUM72100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd19a77ddc942b01919450684ca26c3b04c69f53277970aabdd3934cc7b076e. 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/DKUM72100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2332b7ddca8912e7e2f5f66c8879e3676f21127ffb42d43fc51f7dbf5c5e5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DKUM72200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d4a7948cff73cbc98620a463a666cffb1f1cc09a1a407425ae9e084dbc838. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM4TX2562163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167c0f05d122cfcf289094f4024ac164357f337835daebd0bbe801292afaaa1d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N22590573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f21983e352280cacdff42c2710014e94d111382940306b49213dbf82e1c21e8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QMFMF2442816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4104d8c6c29475754227555419bbeb754da0cd3b6df02ba3f3c04c33167220c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFME2521123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0004801b886ed26b986f55fd936d9de39c48be2190517780851e398a63eddc33. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKXY12000304.