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 0xce8958b1b94c35dbc29b000ecc6be48d2da95e2ccca73cb3ecedb3ecf8dd1c4d. 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/800ffb41-f220-40d3-b604-80450b8143db.json and https://artists.proofprofile.net/proofs/artist/800ffb41-f220-40d3-b604-80450b8143db.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 0xb824e13ab6f30cff0b158df056bb7a9ba6b9b05d8bfa189b97c2066ec644dc4e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADS1827728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5731a880c0d662125f41388162491cb699b7e7711439eaf44ce7d9704988c55e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM81903833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1217dbed608939b4c21ce9e2351dac1d3d8c942f47f71149d8c30c8a59cd7a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR96X2005112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b8d0e2de96d9cb71649dee8a887bbb4a7343648064165ed72744fc369a2bba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB45A1901908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b8d0e2de96d9cb71649dee8a887bbb4a7343648064165ed72744fc369a2bba. 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/GB45A1901908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3abd61d3f2c005cd2d2aa9761cb6bdd8dca6b7aec83a0c11b6e6a073e422b. 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/NLRD51632501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3abd61d3f2c005cd2d2aa9761cb6bdd8dca6b7aec83a0c11b6e6a073e422b. 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/NLRD51632501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb46f2592a5bfdfd367c0209f7a76c340833f5241f7ca139b9f0ed2a0c2525a8. 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/FRX762084049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e4c23d9315cbff20f1027f8156d628bf62981e0f220c136c5b800e410f21d. 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/FRX762084051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bacbc83f049f8884c31af34b360c9601de763cda6d71a98046ca74d663bb02f. 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/FRX202245619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f1b50e251904786be2a8a113c25defe9cb535a9aa32e096921d3ece7ada547. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUS11800329.
TENNOJI (feat. Lonelyspeck, Akurei & Elkkle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc85a497d2954dc6c3fc555fcdb656f834afc4cd595a0dc2023425490a72f2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUS11900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade64c0691d26a061f794f62e7bcb1831893b8fed85a6f62e029fa8750d5127c. 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/USUS11900148.