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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e6eb2f2e4f30eb751e83c75f1b3109eedbe5ad6e97505e12d866ba83ac3d34. 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/FRX872430941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b2ffa73eab3bbe2d9f818f08346026cd5784b4f8a04531ffc0aaa7a87fc71. 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/FRX872430947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e17ccd80683edd77091c16f6fbc61c477d59e73fa0dd5e9efa635bd57582c. 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/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 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/FR96X2451028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efb797147e07efc5aa1bb20aa202eba0ba22011ebd99a124c1f48114044d4f. 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/FR96X2451030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd885c1f8124787a7a1480b9aa3a9a099fffae53ab4e66bc7f8e889f749d645. 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/FR96X2468875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46324c719399ce7828271c8e334cf3d45fd30e29353144a6b2c14d44af031a62. 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/FR96X2424434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf35b911b0dac6966db8dda118487082e879f5ce164e4ec9c578f32a329370f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR96X2424436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e91151a300c6ff678595250e49c56ea99ea63f83ff4df287507ead9c64c3f8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR96X2424435.
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 0x3e53572598bc631e4c0d6371f5babe9b2416c7601154143c2d93ee620459a072. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR10S2426914.
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 0xdd0b077ce9493710e340a96bc9ac7746bec4128015b296ffdce275ac64c8fc88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA052320047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e17d4f35efce1257ecd88e50af80f876720c608fc821fa26c1dab3c6499b8. 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/FRX452369406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e118409e8da3aa0364bc5dc06ac06cb326f2c9213381d4678de865c0f3c2d79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX452356494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21f85893ef561bf22116dff3af860d73e4c4ff1d88498e37b269f38f2579fef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202365592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a59e5461d923031940542be68c9bc9a17cb0f2c142b0e305b7507aa9643590c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R2323823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83dc47f9d1ea5705e3e8fe0971f7762df7b9b13bbc6c1218269a02d7d2456c7. 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/HKG731682069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c46d1d46ec195db039ecc1d5f566d95a30d49e4a4175c173ac11bd37aa5d1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 0x14e3c048420a65a7d82b8eaea748759f75d23e849193e45b24f8306598d2fbec. 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/FRX452204993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f3f8fb70a70f720cae213da40b549780c58ab2ce5b005521f61400fa91ec7. 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/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 0xbbbb0a42aac8d8ba8136592a7fc48ea0b3b2ae6f7e778484784a58c9da95d8ef. 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/FRX282253942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643058dfddac8b76b8670997dc08be2441b434d3bd55d6fe69d1a036aa8f0d99. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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 0x04ae9bea075bd29127d1b4ab017514c10b898b892712acd20e2688e0dd18df29. 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/HKG732238167.
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.