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 0xd00804be3c5256cc43f5a0ca8ab1e3e155e14059e623e210fef5d39543bbfc78. 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/44b66b91-4d06-422e-878e-268bad3ae192.json and https://artists.proofprofile.net/proofs/artist/44b66b91-4d06-422e-878e-268bad3ae192.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 0x8499638c62bb09b26d5a0573e4214c5bdcd8679da3c9bcc23af3566964ee2995. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GBLFP2109914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02989e0328b25b5f6eb0cb435fb654416cb6c4ee8b79152bf12b618dc8daa84. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBLFP2122893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ec9b2f4fe014b3aecadb56ccbee45f3e5317e44c5ba6b0da241e6ed05291e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP2170299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c746312b28a6bc915bdbee5012f8f16a2be818398a8ffa0e46b18cb9d537856. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKXN22119576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94ab50883e7fe64180cdcb8a163f4fcada7c9074052ffe88832640277e9a68. 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/UKXN22119578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9854020d87b57e1521d7730e9382f253d96a11dfaab594e4250e77f25eee63dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22119579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f68ee362bef8cded4fb137286f72130b19d7c65888a5a13f256a3dc13d61949. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX3Q92166530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cc17e1fc1b3ae53212266c96ef96d8710e98a9221cf4ba494eb5b9de65b707. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GX3Q92166531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae741db46147612fdec7428612603adf9296a72e651df7bb34936b0c20077b7. 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/GX3Q92166532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410edf8ca1be6154383f864ebad96f2a7eb7d1cf589b65c599401144d3bbe758. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GX53U2001174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3755e25f62a10643c8706354601f7bb9fe590a4fe98df514b4746c2d3519ff5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX53U2035756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f4ff13fa5b924397e27f6044c0f722b4d0dd04261c1b0adf2bda6bba5c6fce. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX53U2035758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95c70e7d9b7bc462ebf029b9bc001c1ad57b40dc18cb31a0f6a7f527d0638b6. 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/GX53U2035761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac9db7076824df095f434ec62da59bf1527cd3cf652206620f04918bed753da. 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/GBLFP2217771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174dab481498a42920fab0720df6626a9e308cfeef605460513ed5db7156725. 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/GBLFP2217772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf237dc1415ec7e103b533bb8e9e6696a09b49ff385dd1c476fdcc7777e981efb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6P2248159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf0c52b8172a3fa01a582d4ea468a78a618fcce11e191b14a81148535f3095. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6P2248160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79c70e4be07b5e348ed289340e291d9e32e695df845fb88fd516e828fea813. 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/QZMER2241660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f51caad5987aa73f5c67c5d30e604fa3b42819401e5bc04773b371b476d536e. 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/QZES62403990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7422280e4d0395f51711d9d6657bdbc49926a75adf315a14579ef3e61fa225. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTB22579300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069fbe7a50127ab6bb9a2e8e96c3a6222365a60dfd5a74e884189ac77df6f0cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPEW2513594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8304fd72aa1fd3bc03713b649c04e01d08674c4c5026688ea3e6f409f59bd0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2513593.