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 0x6cba347d20799b3bd47ae24e32a68c75007058ac58d1d4c59fd6f96c1c053d88. 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/1f91f4b9-dc8f-45cb-9009-c2f261cd6b7e.json and https://artists.proofprofile.net/proofs/artist/1f91f4b9-dc8f-45cb-9009-c2f261cd6b7e.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 0x7a24cd7754baed9934222dca693a07ad3377fe69544563fb504bcb9250d8d8eb. 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/QZNJY2404536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe214584d0599f4854c6e347a5d6aec27ac16fe75d64b421475d32163f192a4c0. 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/QZK6J2437005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cf56fa95b835132ae0b3b0eee7540367cdca49bd79ae0f58814507662ae5d. 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/QZFYY2472308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec91e1e7310679ab41765388ab3de3d70306886ec77ddcd193bef50f6798e16. 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/QZDA62499568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99601b1e922e6bc9dc7299705e4e4f9d6dd2c70206110f121bc5fb198d76af50. 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/QZDA62499569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a809e127d9a0da0f5867c3313e59d85fb782b359346804b093dce4a22c18d62. 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/QZWFE2380971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9929d2625b45ef5592951d7ae1056fd69f26ba61ac4e5826af748c1916f6d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZWFE2380972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ea6e7917f5d0e9f694b226cd3d2b404cdc4c428532bd3d4fe38f20442ef618. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZW9L2367716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be94cbcc1135f8485cedbe9e170e249b28b6b230f7665f10de5d05f3b6bbd62. 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/QZWFF2397460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75789e52f6c9e73c4c686854e9eab0d5802c5a4b1ad8ae2bafef6e1d032013e2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWFF2397461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705099f1e6b6fe2d3d8430ed2dd4dbacfe090f82f08c9a401695c1c6a8cd28bc. 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/QZHN92369245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822b74cacd39076b0ba2eafe4f8894a22f671ac6ae77c981c041cf76c0081f1. 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/QZK6Q2398907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b54e36a6448f238c572c9ef8c16807bfd892d8fd9ae6643aa8787281b54ed79. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLM2347805.
Que Você Me Quer (Uzaki-Chan Wa Asobitai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66cd6150298829bcfb2af8be615457001003a898df5e8bd8ac71fa4bfe2dfa7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ5AB2326990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606c23352cf153fe7687a7d4f3e92b01e5215d63aec8bfeeefc9ff752f44d18. 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/US7VG2358336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7cd57211cc5871f1be31027f828021dc320f796515ba7680d3b9eaa47e4120. 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/QZW9N2227567.