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 0xf6bbbe7d5dd5ca2ac0f9f71fbd726ebbce118c6ae35bf8ef3902ac78d0ea623d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c74dd66a-b517-417c-9531-91e3eb6ce220.json and https://artists.proofprofile.net/proofs/artist/c74dd66a-b517-417c-9531-91e3eb6ce220.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 0x0ab8f0bb4d7ad1e92cd39f0b553d63029c77499e0d5d942a004bfc59ecf43c24. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIVLM1000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2689795fefbe88cb712df31260a2a1a471636ef7e5fefe75ddb90b56975656. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FIVLM1000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe093958c0f7734cfcef0a2ea9ac2fdba6b3928366bc74ed012c4be9e7069b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIVLM1000075.
Rautalankaa - Tapio Rautavaaran Hengessä
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fa44742e0a949a86bfc81c607c98d06238e1f4d421a6ec7ca17bfd0eec2593. 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/FIVLM1000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88283db8f12a40531a255016d8829b40a8382296989415804ae7f7371e01011c. 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/FIVLM1000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa43bad7a98f9699c83d2271dca623c044e3ab2b597ddb1cccd6f8dadb94920. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/FIVLM1000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2412f15700a76a93aba9e07ad3ec734bb1330156e27e0061a6c085cfd5fc79. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FIVLM1000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a87c44a29d627199d490f02c4f4c87dd740b30143c6da7bb9cd517702f6616. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIVLM1000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2689795fefbe88cb712df31260a2a1a471636ef7e5fefe75ddb90b56975656. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FIVLM1000069.
Tuoksuvat tuomien valkoiset kukkaset (Valkoakaasiat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a11841e8da982de6840442c46f639ca4270637bc31e3d7685214dfcd7e7608. 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/FIVLM1000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe093958c0f7734cfcef0a2ea9ac2fdba6b3928366bc74ed012c4be9e7069b. 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/FIVLM1000075.