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 0xc94d34eebf21685624f872d550030dbf8d5d0233df21c82cc15847116e292622. 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/9b2aa6cd-f62d-472f-a725-4ec944a9e480.json and https://artists.proofprofile.net/proofs/artist/9b2aa6cd-f62d-472f-a725-4ec944a9e480.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 0x11d167a2da4fec2d860c8dacebd9fa2959a3ebbab10f7e8be15e7fbdcc4d1136. 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/FR9W11801489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41d023d5fcf44a252e8a8271e7fa63ee9497483471744c926d24203758956ad. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:45:40Z), 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/FR9W11801495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689da2494668c16391e126e7f65b49dec669b614f4f490c4973aa2ad63ebf022. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE5ZV1801508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ca0865742b37575fc7a089b78c49888e15e26c9ccacce7b4b277a23ecd53ea. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:04:48Z), 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/QM24S1905858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ce9f665e2dd30fb2c842ed1fc27c620fc56d47fc77cf05effb204d3a2ac8b3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM24S1905859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eee828f3c62351dc2ad2b793f50f91cb5af0b87af13da45d9ddd5f2f90a247. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR9W11906029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5d264d8a1f7d52432874451fe51ee5728c5160dd4dfab0c7af3073249bec5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR9W11906035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f128f33a3e5d83faf998ac0be6c23a9fda831a16204794e4445069a129d0e66. 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/QM24S1924829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd478d82f734d6f82fe22af335db8500e144adc6e77ea4d7aba5b5c8d645031. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM24S2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a60e73e56e4641b4e2858057f2097631ef2bee503b2b5904dd61e2e5b6d1e. 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/QZMEN2031711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad192ecfb31c404243bbc3104ef1c6b1025965f61c99bbabf0df5a0e90806ce6. 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/UKW3Z2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64065926ee8c9b44a9b6fc7dda0b561f00597890febbb2b685dc4ed79234206f. 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/UKW3Z2200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a2d25e8532ac7091325c58f63d8fc92c710707ad414f7f7b27a63c7a497fc. 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/UKW3Z2200349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4b5f5614d324a812b65c11188633e799d93c52a955dc2e7eb91a0dc022b1c. 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/UKW3Z2200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc436ad88cc44c9654aebf7ef3c54e07a79b6b747665307e3c04e04d975435ee3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12307495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767776fe7e8d7206078b9eb030ef440dcc4a8b2e213b646cee92345f3c579ffa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:39Z), 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/TCAHU2455409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eca0f5608317e586110f543f2f369240b6cf8ece0a23cfa04985e4f3858a904. 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/NL4WT2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ba1a5710ae13baac90f32f1d75a3acf982f5f39d5e865af0f7ad37327f2d2. 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/NL4WT2500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd873a0989d90150a131949a5626b4b940abec2ccad81da9eddcb723e2cd0c9. 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/DGA0R2339190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fa36dbcc85aa80db922b744dd4c2af935c3fa3198bada72779b507e73d9f3a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEDV42000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652fa145ce63c07f3f88c5505d42c0d01bd1220ae97a66adca909613415a069d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S1924035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f8b4980e5579028b622d35c44a710f688b0c9c678c973a9e52ca2a33ceada. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S1912552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234a6265d3ab0a72c669f3f599b45d971adf4f5880c30a687ba7918c61246edb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM91767121.
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 0x0fde79b60c5155d1b32c77c27f658c34f51ef195d210135b8ac7918a2f83c753. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM24S2002626.