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 0x12e0e5b3f8a58a2306316ad59a370f2838945684cbe42e604d5c5afe326d409e. 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/9a0cdf36-85ff-4219-9ca5-534926dc9021.json and https://artists.proofprofile.net/proofs/artist/9a0cdf36-85ff-4219-9ca5-534926dc9021.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For the Love of Deep House (Nostalgic Mix)
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 0x6d52e799bff7327b5f69e11788122c8f4f2f27bf637132f9bd1da85df3f46cf3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEH742504390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d3b0931f57b1764fe5e6a5809cb6bfdd02868d000a001c94191f391a8c849c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEH742511019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbf8d2f620e352b6c5aa2f921e6383c3edf2c439055d164565df52e1a332c0f. 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/DEH742511020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517837bba959738ce7d57e0c885cd543aee4a8ee64db27a02e1077c9ac25b355. 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/DEH742511021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed82375f1305012b4ba6f829ea0a61a8cc8bbe24257ce8da204e4c2a451ae2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEH742511022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa912fb4403f9b0622e1b39625d0c5700db02abeb99d31b9d782af5392d03890. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEH742511023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d13b9b8c55e8e076e709747dde3f52c637cd6ac997bacf893ffc07122ead91. 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/DEH742511024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58335e2c604b833eaa7c1e33cbdf01ae79c05f092c1ae21b0ce09ac39e97ead. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTBD2594934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd0a274cfdcfbb0786a0a8641e3377c0f29c206031c09a4a8ae06558c4a191c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTBD2594935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310a7d77790089cbed23a4e64da639e8b16dc5aa467c623014e67230364448e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTBD2594936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b379c5f468085438cfbc2875a4488c9de96f78b87e71e769b13faf5cbd94637. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTBD2594939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72058ae8da4562ee4be4b7222cec9351faaf47951ba69829b1b30673d12e0cc5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7Q2525984.