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 0xb1f5879dfbc53e0de40ee7cff459e5e795e14d3beb13bfd1af7edf3ecd011245. 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/94d749d0-8ed3-467c-a8b9-7ca2423e5d1a.json and https://artists.proofprofile.net/proofs/artist/94d749d0-8ed3-467c-a8b9-7ca2423e5d1a.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 0x49a60191892d3f418107307fc6b46ef0b31b0f6bfdb85720148937f0682a58d2. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/DEWG82000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898736e2e3970435320968dcb67152dfe54695f34e0cb3dc6271e03f59bf547. 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/DEWG82000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e372e4a8e4e23c0005b687f6593b7ab722b004d3cf36cbf5090d8340420209b. 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/DEWG82000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc749a93f107f90e849fde0a70623ff539d5c6e898cce79fc63f1f67397d82670. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DESE51700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c6013163dfffbb9112c099b8b7c8e3898dd448429442fb7a3c96112758232d. 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/DEWG81700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81484a465c0cf9c6d8307898291d2b054cd16878607d14b4369d12df7f35124f. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DESE51600424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b931ab33949b7e400aa5b46eca692f70284a80478ac74168095114f67a44b31. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DESE51600454.
Harsh Will Never Die (Remix Device Noize)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1de7a409166d9b87bf0cb30a0e35396d534c987959d58299801b59dc7dc13b. 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/QZ5AB2241103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455dee3c8938bee8c0235f0eebe19260f55a45fc9c3b07b73551d71fc2f1a950. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZ5AB2241108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f25f2801741fb741307908dcd0e025fc2bb3e7ab102949405b2d2f26bbff822. 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/DEWG82100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d89d9b867c0678b8127466d3c288979e012e46ded3fc03f8f2b1971642af985. 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/DEWG82100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f0a7cdfd09cf778900927ef38eadfc10ba96b41cafd9e386bd07aa8b17ec1. 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/DEWG82100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb8652ecb9ec3ac47229a1792b1fef874c639f62285ab4488ea57ae89077805. 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/DEWG82100054.