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 0x101a024287eba91a1340a3e01aa5e4ba9f71eddc6907ed52a57d337c2f40a8da. 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/d6e0328d-fc14-48c1-9bd1-0f8f20989c45.json and https://artists.proofprofile.net/proofs/artist/d6e0328d-fc14-48c1-9bd1-0f8f20989c45.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 0x45ec64a116a31325d7de40c0e2ac6b4b1028f54f513cfe392e7961bf350db385. 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/FRX762424827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84266713c1716e68fc42bd560401806df3833dc4ae9bc1bf7019eb4e56a66dc. 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/FRX762402609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb940c9f7fdeb5ff7e284a377da4c32c94c7a12b81bf22bb668ae35abe95d1402. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202446854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad1404968163113aff50b8f9ae242b36daf3273b9df52739c963766f45046af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX282402321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72ce3e482732b9f6f532063f9d074ca44ca8d777f091ae912712cc27b9cca82. 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/FRX202445333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf71597e3d3b5bb4a2e77128425cb6ac973c40dad2e6c0d0a589c847a3a3af1. 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/HKC992325089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9910a141c65d73764cd114b4149a8f91caeedb87b3223b937d8aff85fdec0901. 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/HKC992324786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0358b399e5a6f4187acfe50bf50713db4a457f9043f316bbb07efac184368ab. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKC992324811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0757902c976aec2c65b0733162b86559b4ba6323aed9fcdac9cfcc39865fcc. 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/HKC992324925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64ab657eae29b272d131a64d40c5ce8d6f3d918160b903eeca4c1dce966ed7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKC992324657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57191bc59e0c5f729c9c92b73b8d6a7e50be7abe7c3667aaff322185fd30e212. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKC992324730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfdcb909ad77dbc9d43f6a109837e6fa9d6463fa3c55d3387aef2182e39b802. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKC992324656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5179c2b2b2b60168c9fc5100f7000dff7bb03411c1a33080b4e9c6594ca77951. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKC992324635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74caa9d81ad02e424217d64d502ef3adbd378b7c2dd63e7d16a20bd4d9c99941. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKC992324577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d34517e04deac9c978404baf42ccd109a69885d305420753e6bc7c971661b9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKC992324496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b429d1bc75a6d7daca6e90d17c4990acc2657819063d206e1ec96c2df23d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKC992324408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678cd8050db0575608734ab573857d638848f26087747e60b1ad0c3fd298cf5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKC992324274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25b6f548dd223eb9af1ed60a146d628a02fcfc116e460976a7d641d878c61f2. 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/HKC992324202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7fac331610e87c2fe23a5a431ab461bed61ab0a813a876bc9c8f83fe213a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKC992324199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e7215e559b05734ecd9e4568c872c7ece89e9ab46396b484817aae0f2a170. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DGA0H2435949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a121345409cf1962d6262e2d6ea9207063045b932ed48fe8519388623ffe3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0H2435950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6459123cc3ef9891a2d6312ebc0ad357816769cee584c553aac41c6ca9035e05. 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/DGA062405539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e43e5692e1ff4020e0df96c858b020109049139948a0da4c1d770c6975c528d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA052495540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca99a535c284bb15b0c95c8140200e5140838a240ed1e7a82a2689e7cdffda1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DGA052495541.
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 0x93e6a938778916d0e72061adfe91e53a714dd15544a0d904b8b9472b97cefc6a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA072424992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1911122bf9c71f016932ca21a92a9c0ee65ba159a21a9563290813e1963f3352. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA072424994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b0352f9f20910952eaee9228349fe2afb0e59d972ea3b6d259a8b80793cacc. 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/TWDL72400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf0fe2165e0ed2116b66e87d8929f9b92a3b57c5d952a61e625a641e6245c16. 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/HKC992325641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2446917c9fe1882b1d45ae12cf0a561a1be65d605a2bd5e9d2567cf69fe7b9. 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/HKC992324997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb869a496264f07411ab1c7f9766f34a8823cf28a6ecd6c00c41ca8d6130dc92d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKC992324926.