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 0xe359180ed0d97d83fdeef80a58677f9c850f51192a10cdedc3f9c025df74122f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f291ac7e-7dad-427d-853a-89c9d54648d4.json and https://artists.proofprofile.net/proofs/artist/f291ac7e-7dad-427d-853a-89c9d54648d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Molly Darling Cunn. Steps Pipers Waltz Bog in the Valley My Land
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 0x0a4e0edb96ecf8f9642b59cfc7c0b3804f6847b73ef70000681bd040ec9413a2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:24Z), 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/USL4R0780236.
Twenty Men, Let Erin Remember, Dawning of the Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede56486a77a694d4fc7e5a39b81e7608de7a0e8040688725d85a275c1200337. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USHM80732540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc319ce234109ee23f4fa80d4d803f238a23c3481063b94c4764c5d38226425a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM80732543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23093fd13a03879e81d6ce043a9fd28b07ba2d80592b443f6c2332cc3e0f8a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:44Z), 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/USHM80732548.
Danny Boy - Solo by Pipe Major Tim Grant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315ec3e8814e459e9a8568bdfd730449b35b016a9a48367d329840689fe45c3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:42:06Z), 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/USHM80732551.
Duet by Tim Grant and Liam Flaherty - Cliffs of Doneen, Rakes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f151b5f9c521a6a5a42cb18684928559ab3258a4b8e6740fa7e81de04e37d90. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM80732554.
Scotland the Brave, The Rowan Tree, Will Ye No Come Back Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a66ecd258d96b7a4650f6b908ea638997ca92cbcc4f3771403a8f43e2ec735. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:53Z), 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/USHM80732555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c879f817012d215c6086bf431a27bdaf3baea58f57840d85ef8d2d1f81fbc9. 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/USHM80732556.
What Child Is This: Hurricane Sandy Relief Fund
Auld Lang Syne: Hurricane Sandy Relief Fund