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 0x1b6390f83d80c3cc0762f635a0aa90ac17ff6716cb972847f8b0ad6eb257d283. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef5feee1-640d-4574-8410-6b526f5033e1.json and https://artists.proofprofile.net/proofs/artist/ef5feee1-640d-4574-8410-6b526f5033e1.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 0x52d46bbb508f7aa80f72eccb9ef42c968f474b612979337bfa97a3559ad1ed2c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CNZ171500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbdceeb6014fcc70bb07121682c0ceb5c24be680be0518c785bb3fcb9d5e141. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:22Z), 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/CNZ171500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9088ee69b4fe94cf70cd9c4e7855bd491b82889c86388e8215e99c106f0052. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/HKG732236703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd83173b6ff55b39cc8725111f63726aa4b042fa624f8289f04736f2e00e7705. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKG732236704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e03a3a211d0ef102592b596daca9ff0dcaedd2695a86b274eaed0d265bfc5. 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/HKG732236708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f33f8140aa0bb0e7de2eea5860635c09287b72e3d237e8076c6ee65c649d21. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/HKG732236087.
你是如此难以忘记（《一代宗师3D》电影主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7004fda5290984809b082522feb7a6d369c400ac56b083720917b0bead59bc26. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/HKG732236941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae433612c85edf3f07033f046f37b280e68b0af9fcfad37f9c8355d7a7e91387. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR96X1902369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981549e93fc66fc6e5e9b0b85c87003d4c7df30c1e3b7da39f744f281a6d17aa. 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/HKG732134875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4831c875fd1f327c9734126b6ed26e7945b95bca09ef1169e24b4868e494fea. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR26V2013430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820dc036c5a089e2f6ed5103336f91b0fd61ae4e9e13761942c10bffcd2aebe6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR96X2144830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545a0815531c58bfdb344fc176815ff4998ecf26e1361b9ed03a1cacd38b77e. 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/DGA0T2455472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a5dd24aa1b18a0fa8b876c53c89e9dcecef04d02d0c1c7e64b688203c44d11. 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/HKG732235723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927fca39b9902606d3099aa18c9dbce7306ebf9a0f0996a5bc337033e29cbc34. 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/HKG731679323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ad8c468b71d36f68d8df600de203a7ea2d41f9bbd9f9375b8367afd4ed72f. 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/UK9951500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc40fcde5de253c2e8b3c76d726daa10673d84b1b38f813ec31f559f9e6b5ea. 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/DGA0T2465998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f06b0cc251b59e3d0c93de1e0fc14e193b4dd7b63a3aaa3b5712a63d707bb6. 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/DGA0T2466002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd46eca6373d7b0c7e473329ae6ee20ae7fb7e1270dd426dff12f7eae9c16bf9. 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/FR2X42557864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896cf04cc174a1cd8f6a46cbcdcf831b0dad8ff5145b1f5dca8b743beb7d1ad1. 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/FR2X42557866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f16de7358ee5ee36759be2e000e985ada792b5bbf762647fa6724a251f9f45. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR10S2185431.
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 0x9232065aa4cf16365b9fd896b48115eaad6f6961fb9b7bbbc1243822ed981969. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UK9951500505.