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 0xb7d937a9ec2f68e2b1e48cbeb27b1139b90e89ba3e57f5b4c5b433e17b5c0243. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60f9fd3e-c0d6-4829-b606-8c78da94fbc4.json and https://artists.proofprofile.net/proofs/artist/60f9fd3e-c0d6-4829-b606-8c78da94fbc4.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 0x67364d41b05accbdfdfa17b53f0588e4e366068838fbfa7657863e4495c328f0. 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/GX8LD2453178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2ad48f764cb7ef1d23bfe60ed12c1a0b8d1bcd67fb204a6b0026ead417cbb0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX8LD2483612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b404eede424b51a56dc237040037e578332cde605791a4b66ea782a5775168a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8LD2442025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb71d1c875d7c0d4427f34914990721352d2bc66c6aafb38585f901926e7109. 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/GX8LD2419107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561117d66c9402bfc6ea846feeb87c3ff6bf2e0fa380c39c7ca7e9481be8130d. 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/GX8LD2423054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0139499b53ee2434db7854a8f5548416bdbd6de8d5a2e9841c7b5457fcac8e96. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX8LD2478273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d91e2d296a5be962119696f1ee87c40af5a344c5b5cf783d769622642aca2f. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX8LD2487020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d48133508e4192e60ef61f9b24499d78c87a194b5bb5bab749f10611cbb4b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX8LD2400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91316da7b601a986d9c957d7e6b62dc62762c7dd83a03012d18b4af66cb49363. 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/GX8LD2585305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4a956ff32dc4dc38b62fedddfccd2836f98e74bb45806e3551646a94d3315. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX8LD2570770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd35164424fea3d61d10f3a7f8383d44c497845373707e3fd3f6310882cc39. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8LD2571453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb17124607746b0e09d6ea0929b499a272449051c76789c458041ef26801f023. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX8LD2577707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c575a8ef8aa72ba284f8bb057bb5a6beb12bc94db60c733d22d65101a38dc2. 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/GX8LD2507927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06f163d5222c3b6e3922c8e2c9fe5abba368fef673dfa8bed49b69fbc9b70c7. 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/GX8LD2584254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beceee35700326b0faec7d4c07bb41e2e5ce8c8c40162ed2270da7e1a693b8b. 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/GX8LD2589705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d80a9ee6bdddde22d2f2098157a833dcaa7995975c9cd0e1db345de2f70e56. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX8LD2580557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4fe59f306de9d30d25fb1ceab8eee9cd50713c163aeff6002a6a24f6721914. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX8LD2551727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494124066486720fc6e5301564595901cccbc9e690b117ffb61c61dca4844578. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GX8LD2563100.