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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add48f6ced867eb060815b42319414f3a146b7a90736bd29c8cffec28436ce2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9da7066-5f41-4cd1-83d0-2a16f523777f.json and https://artists.proofprofile.net/proofs/artist/b9da7066-5f41-4cd1-83d0-2a16f523777f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc9160ad7f4febb8ad76691b70a60c128b9c81bef2ef109a04c8397a438359. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ATGG72207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c9c39717684d01edfe90839fd15eda221f60184a024f5e41fb0d9063cdb4cc. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ATGG72305004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47de52eeeb1cbc384fe8fa3de93afa226e72ba8d63d091c597a4edaa082381d2. 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/ATGG72405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2f33757d3a11d5addd2f29a23f51a93ab8ff3344e2e3aa9deecf6a2d7604f. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ATGG72406003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fcc4d0286693509d2e57bc092bccda173f48f9534c7b575dd58fffc6d564eb. 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/ATGG72403002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1724b96d2f1439f6ed5b59990499f08ff0f8066fec0211a8378187d19ea71b52. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ATGG72410017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a23b0e3ce48ca19a7a12bae0e84bfe0692bb3a25e7382727a64039a4571845. 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/ATGG72410019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21804f329dd4f2ea495565f53fbb1ce42898d9370fcfe050e21495885771a35a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ATGG72410020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c9c39717684d01edfe90839fd15eda221f60184a024f5e41fb0d9063cdb4cc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATGG72305004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc9160ad7f4febb8ad76691b70a60c128b9c81bef2ef109a04c8397a438359. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ATGG72207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c37444b26b32981789d3eb1f607015a11e8e40c0c0b45ebf98c888f8ee2e5. 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/ATGG72205001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc470ed9540d94b918e8f892b6ced31e349add031a82d0c139d55d930bbb698a0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ATGG72410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d77a769f21669b7906194e5bb34a99f43cd3a02820b9c43028e63d1a722bd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ATGG72410024.