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 0xfc954e66938d61b376f2d1ca025531a38394b6f97e98be62f02d54881963db17. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ccb84ce-acb6-4b44-84e0-542a3162297c.json and https://artists.proofprofile.net/proofs/artist/7ccb84ce-acb6-4b44-84e0-542a3162297c.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 0x4239d3db45ca1815436c0fbe1050ca47ede16b6beb695e252891aea5b5f01d85. 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/DEA312300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a4ccb84d030572ce95d80db41c5b7d5692d1517c6579ad667f98927171d2a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL7QW2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee182ab0e65ab622162a88965bc9e62061753556f0149490dd5288801755b660. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GB3W42300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d91b681f58c59bebec02166b6882da99fa93d3d116d4cdf6b9bdb38b2fd9ad. 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/NLD682301625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08b7ee2a89637c2d7de04ef670e8eaf825707e8eba2d3e058d2853db7300b72. 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/NLC732200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c05f9a43bf4f462896c7654cf3dbfe150c0d244d50af04e64aa87ef373d8d. 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/NLC732200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bafd06bf843503985ed94c5a9fe586fe203ecd648d4836fd6b293f8bb04202c. 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/CA5KR2248466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0dbc6582a9deb99cdcc7bd07e19346e0bb248cc464013d722c52a9a19a10ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA5KR2248467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40710f95c9c6146d1a0dabde57e06d82fecfb158eb2e45ceed601dfc7df8a1d. 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/GBKQU2245766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8711d417862004aef181c6f4aa40a7bf2ab20bc9549bf3c177a2868559d40d70. 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/GBKQU2216848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3862598e8b87bd8fae73b863c2f053bf1b79f3ac311dca2910bcde38b78b812d. 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/GBKQU2216849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d36bc71e338e78e1c339fde9020d299853889a63a90379be3a988ea66ceec4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GB3W42200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef9c544ad0676aadd5469aa9358c7fe684b9c087746483841d89b4235ec548. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR0020523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66abd88506c804a7eb5c4cf8efcac8d18229687c69128410090083007cd7e557. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CA5KR2196572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76737d4f1869e801272a9a250a1a2e6c18bfe1b771ff675270a77a715e9c21cd. 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/GB3W42100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6034182368074737f4dc64d7ed07e9083275b049181360432fe91d61f4c0b09. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLD682101630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21a0ff4da105417e1943d7b80dad1f39b0eff238176a6863c5c522c405aaea7. 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/DEA312107043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae5d8384d35e99ff968b13f7c2e9601114723d2998e15569a4ed385d6d8d8b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLV62028977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53065e84e285bd4027fa6e2dd76576f1aff771c80415220f4c82b8d4f580a608. 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/GBKQU2285717.