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 0x083f081c5d00ec7c1cdaf82735299783b72a76a861fc45b0a8835f1ad5426818. 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/395ca8c0-fb52-4a37-bcc0-855ad278a1a9.json and https://artists.proofprofile.net/proofs/artist/395ca8c0-fb52-4a37-bcc0-855ad278a1a9.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 0xf6e6eb2f2e4f30eb751e83c75f1b3109eedbe5ad6e97505e12d866ba83ac3d34. 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/FRX872430941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b2ffa73eab3bbe2d9f818f08346026cd5784b4f8a04531ffc0aaa7a87fc71. 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/FRX872430947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e17ccd80683edd77091c16f6fbc61c477d59e73fa0dd5e9efa635bd57582c. 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/FRX762478200.
北方的春天开不出南方的花 (小花版)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2554d5e0299b15ce5f68608067a6323ab503ac8362f85ae12bce628cbc473. 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/FR96X2451028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efb797147e07efc5aa1bb20aa202eba0ba22011ebd99a124c1f48114044d4f. 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/FR96X2451030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46324c719399ce7828271c8e334cf3d45fd30e29353144a6b2c14d44af031a62. 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/FR96X2424434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1812107f49c0da314d795e518ed93e12b654855bf73e326ec3a354ea73ff7. 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/DGA0P2312362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f85893ef561bf22116dff3af860d73e4c4ff1d88498e37b269f38f2579fef. 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/FRX202365592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c46d1d46ec195db039ecc1d5f566d95a30d49e4a4175c173ac11bd37aa5d1. 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/FR59R2308612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f3f8fb70a70f720cae213da40b549780c58ab2ce5b005521f61400fa91ec7. 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/FRX452204922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec51743e9b0023222ebf68a069ce4268d40cad96438d33d6f678dce1b8964a. 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/FRX452204924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609038fe69bd90b6f5eded0181aaac8bfb7f7a47702d1d35ab4fd6adedb9c4e. 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/HKG732419130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643058dfddac8b76b8670997dc08be2441b434d3bd55d6fe69d1a036aa8f0d99. 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/FRX282232868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507fccb41fab8213c27075eb859041106ef0d4d9afe983ae8a6dea10be141d33. 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/DGA0S2485597.