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 0x652a35143ee03cda12d62444edae0507d9850fe637fe1e115d0ed2dae5ba60ba. 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/2d94ef58-2b66-43d2-a46e-6dd4bbbe4010.json and https://artists.proofprofile.net/proofs/artist/2d94ef58-2b66-43d2-a46e-6dd4bbbe4010.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 0x66bb94ebaab0f3ca4046444e654578b81c4956e862adf939db7b3a28a6cd632f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FR10S2573766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85e8121980a38eddebaeab0176d909e22724801500fd31f5172300ab27a1f4. 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/HKE022303732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42237e72a6805fd8aba41618c42170abc14e46772f0db78fd0293f767c9a212d. 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/HKE022303733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53adf915355b9ffc4d5a049e7677223538e4b63550f4e0a042b7fc62d6938ca1. 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/HKE022301612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca8ca0d18520abd5fd44739af862b6fe78a51b1aa48a590b01682efa43198f. 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/HKE022301613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17403f0b3772236bbe927e65bfb173d0c03ff130fd8b37ac1191b642adae123. 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/DGA092476527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4493ab50ed5c5fd6bcb1decd0336715c6af36753d590abc6abc9c217204a4d. 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/DGA092476528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d285bd813e6fb24b8886cf33397514144562c219d5716e9ff33007ac87acd9. 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/HKE022235201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8bd4e3d3e67814aeaa27a1983b54b5212b1926378a83e48d6c00554a632d4c. 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/HKE022235202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb698c2d8436ef195b9f70003ab2a40aebc272c01c04408d218b04888467938d7. 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/HKE022233876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e7b371a8a26eb0ab4461d9ba0d9592f81ed115aa02a3ab22aa8e4fcd6b98e4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKE022233877.
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 0x757df4ec54e1e80ab46fe3da776b82b1a64a87dd9eed736f48c241e551537896. 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/HKE022233311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd544c8613a789e030d8a4e1713a2ba58435cf9800002a26ae587e8ee9ca418f. 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/HKE022233312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4f278a3696933095101f165d28ce4eedc827466cacd22e0dfd795fe10a643. 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/HKE022211852.
爱不到的人就不要爱了(校园广播版)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e1f1b6ebd82b952b53dad5f329a6f7ebb237ace4eb49e81a0d45e40e783dc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKE022211851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd114826ed9db8ba5db27b1633a68554dcb4f3ee80c06d9b32313353df7a9a. 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/TWDL72306233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a8c49a615453cea723edf10468ed88778660e009dcb4a96a286f3cfcb8b59. 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/TWDL72306716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0fccf763a039bd7ac7ffcd3b7a3a9b80bfc685552ca9c1b78408613a79428. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR96X2337040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03502802255746bada8eba7d7301e8c2991880be2b2edb0c96e2c552ae4b8297. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKE022226711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707572f6f259b6346bbbc4dbbf46914af935c08e472c2c43b131ed26d490cd82. 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/FRS182159690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e35fec814f0bee239f164c45eaa72ef54a7c4cbca2a7a1028d97dcb25683a4. 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/HKE022236874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24854507a59b6e4a9a3436da8ced9ef1746e40e27adbbd036b96d2ea98d2b5a. 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/HKI112110613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9034b337470ee7c3183862f15aeb9de4e8a552ef6b714f1631032be257bc80. 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/FRX872145457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eece2cc388af54e14cb4eadd747aaaeca7c1894556f75b0867fa53e932c27e0. 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/HKE022238463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f2702949951dc4837b7a2f318429da51e0dcba6f32ec07d20569b04371122. 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/HKE022216848.