thumb|A wood sorrel, often called a shamrock, especially in the United States A shamrock is a type of clover, used as a symbol of Ireland. The word shamrock comes from Irish (), which is the diminut
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 0x26d47f1d9f62cbd9c3f60b789ddf82bee6f989e89233635b2237a533605b3924. 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/474af14b-5e7b-476a-866f-0a916b14b501.json and https://artists.proofprofile.net/proofs/artist/474af14b-5e7b-476a-866f-0a916b14b501.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 0x85cd58f1f1f0a09107dcf3cc3cc8ab3339709c6257808c1dafa0723aad757e01. 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/PHU010609778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa464ac14f4bd45ca1a5df8eae14accdd74b4342fb9d6c997187b8e2b2faa4725. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PHU010710119.
Wag Kang Matakot (From "Joaquin Bordado")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb986d84f39d30b390f887b83b78ffee903e6702dcd3b6020cd2373c02fe8302f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/FR6V82352541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5205eba00f951fff16fccf257454041b5596c5d2f06a38d81700e5ca832833. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR6V82352542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f0f81f0b926ff100f59b598e4ca4ab8431082792cc62409533793d8ff9158. 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/FR6V82352543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401d7d26f778364594654ea70af1dcb02289dda36f6ab7bcb06ce8b7ff0907e7. 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/PHV031015233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb120d13e0f5c8936d1fa4a29742797f77abd4c5bf95fd7eae2be0e2803c4d19d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/PHV031015236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d3aa7248fd11c232973e0273f6612f60c753efeb42c4f66d290fd9dbd34a12. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/PHV031015242.
Shamrock - 10th Anniversary (Nakakabaliw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e791945490f946889b1cb6e54fec269f881ab94f42c8d11f9a66583f5f5eb70. 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/PHS031500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225897750de650ffff201bb203bdf0eded0b4ebce8cee55c5256595c4be05bf8. 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/PHS031500507.
Shamrock 10th Anniversary Album (Nakakabaliw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5035e01f6d3089e75889c7fd72197259f39bf5beed32e5772ff06da07d6772b2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PHV032412882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f4d85c9af6b7e00a2df236a0c36b2bd435c494d501fca392cce1ad18c180f3. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/BK4DA2445852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592730519411b9b8ecc6bbc6d71a504a7fa13387bbbcde70234bad4c0eaaf5fe. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BK4DA2445854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf841fe066a26f69a1c2f663f50cf691b3f3ad2c4bc269cdcb0dc05015761d05a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BK4DA2446374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1efc7e7dfe60ee190116e8f390c8ce8591ecfbf4e95b84caef55aafc34ccae9. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BK4DA2446378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0077e1eaf1813b4bdf2779f7d2cd0ec453ae38159ce3345736dc625dcfab80. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BK4DA2446379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010ef60d66dac25c7943fe8300f9170c152a11f98a3a2db5e7de50ebd7a5147. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BK4DA2446382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9537b7fc337b00d22350015dc5695016bee4b65502b83e15dba176da0c95cc. 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/BK4DA2446383.