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 0x208cc49c8f5dfeb68692a1644271a0be65938c55d2ebb88f905dd8bb5d9570e3. 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/936495da-3a97-40c4-9093-1bc7045175cd.json and https://artists.proofprofile.net/proofs/artist/936495da-3a97-40c4-9093-1bc7045175cd.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 0x2f7eac9190af5f04821c0625e12406c4b17d0af45848d2c1c8345d79cb6f9330. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd8774882990f1c440a076da2dcb5cdee201fb10467b5898e85a69389712fc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWA470125001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df075f0befc4a38ab152a6ce75e3693c930be783e1c595f096b2b7948a83e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBCTA0200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97894e2b8df8b1487d62d8aa3b8cfed84b2d96187d1a1fcc602fbf3a72c0b89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739614c05f37f8b15617553e169405e333812b91970d1f7e2d86e81370c5e07a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWZ871800003.
花背後的溫柔 - 電視劇「流星花園」插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17017345af1f8a5e2008bd154db78ddd180ecba41548695371fc33d8a7c498cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ce823aa25f9e44ca142ce1fd723b7d34f7d8736408c6c634a98633555ff48. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad2dc7dc9ae9b545b66d0538b2fe59f9e07dfb6c92bc07ddb1c36950929051. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d97fb0d7cf089d0d48c5dfb70d5563367cb90596311d7dc11128045f0825db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11304828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af7ea1369aca5ed012d027658dc94f3766aa7163be21bbcb05349bf7192e8c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWZ871800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd8652696d2c1902e366ab64af5b0f1767b4598c63c46f396064b2a6866fe9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484caa8ea2700e0b0547a96ae0bf4785dfe83c0b39e3d539bd944b2aba8ea792. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800009.
你要的愛(深夜版) - 電視劇「流星花園」插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c06cd2321ef641eab63e97b88897b4d47c9e6d8b6dc31e72d031dcd964b2f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWCH31800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023038ae707d24f9d2890c322790075c20faa414f7320429d739002024817965. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWZ871800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5603be66a71b2d77f795c2cb51488bdf539ccf5062a874dc490010c1a8a865. 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/TWD252050310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210843c878989b14b84a6bc65875ddffdf3be6f56733874e04465a51cbb07ce0. 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/TWD252050285.