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 0x590ae788e77c6bce697f61db84a0181bbad773aaa2778e92c07085a4ebe26401. 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/88f3ad59-5257-4192-ae67-822a4b021d7b.json and https://artists.proofprofile.net/proofs/artist/88f3ad59-5257-4192-ae67-822a4b021d7b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438d6ca8a7dac8d3c9befa698bc42633b191e322838622df1fd901e83cddd46c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM3861909501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38cc4da6d319a0db2062b40b5838b9f287d1ce129b3fe751c2336debe83fd2d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:40Z), 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/QM3861909504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea5bfac20f4edddefec8474a1d32b67bf75a9fb054025ee43030bc91900ceb3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:17Z), 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/QM3861909505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a6c7520491765e1c6525faa35de40bcb5ef6a81775fc4bfa6380a1928f958b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM3861909506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0e1a92c428ea210e47b2bc673fdfacd1e48e5069674e1d13ab09f23ce82d4e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3861909507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9461faf7def43130c23337a46f29416b4d162054051f0d2624b5a1f0161cb9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:27:27Z), 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/QM3861909508.
Gong Gong Gong Blues 工工工布魯斯 (Howie Lee Remix)
Inner Reaches III 慾望的暗角三 - Zaliva-D Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb0cac123ac40341574aaca126fa9ce03c020544d2ecde7a4bc121cd8f59c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM3862111005.
Notes Underground 地下日記 - Mong Tong Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d9ec6e1ba1d47c3a148c289f0140b06545626c520efb63126a07072477aa63. 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/QM3862111002.
Hotpot (Chongqing) 火鍋（重慶） - Scattered Purgatory Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba17912ad683c1034bb8050b09cb6baadd780793dfe617c9f91cc60f26b5ef. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM3862111009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa729285e14cf8894c893de89e40e090e6e7f407b05de4c6c3ce817d7007143. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM3862111007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cf495d7dd683179c32ed995c0e939cf382f0bb3bfba4bc99c4367c893fd0fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLZ8C2400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c3545c11daef2cb2838cb5c90a54cdb237f54f6f055d245072b493202877c8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLZ8C2400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78b7e045a48d941cecd2ea53849df7c4dc152c3a843eda9f9325ef678c63c3. 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/NLZ8C2400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca82b0169f7a224e2e6c6661708684fb81a1c53ecbb6f7f28217921a8eea24. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NLZ8C2400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96297596e088858db001512a9ff8f146b32fe82006747fe1b3ba9838bdb55f1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLZ8C2400614.