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 0x013e46274397f563954ebdb9cc7ee2004f3cb2334d0ecae60bbdf1747188e613. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c41fd5d7-02d5-49ee-a0bd-3c5735dc9dd9.json and https://artists.proofprofile.net/proofs/artist/c41fd5d7-02d5-49ee-a0bd-3c5735dc9dd9.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 0x3d4c7ed2fac195b1ba76fff878ef1b3b4deb9d8c9920bd1bf6265b614028cd74. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TWCG52099906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b695a0051d1e3f55133c8d6fdb1811ae01fb64f671c2cfd33eed624c01c4f6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TWCG52099914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635fadefe530e26f4d227b7115872d57affd88f16c726261c36ee690bd714cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CNZ512100490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3208e0e557bef7b688dd0f117083baeebbb735f6380072337a405ebe44050c. 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/HKG732493643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27fbc9acd8d815e3d661076ab37fd774877923bd1110106c5bc0c1f9c220a48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QNSM12402845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133b0cc5c7fbc184d357a1cd73a5a4d1cccb4225c1839102a8623317e37633a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QNSM12404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19563dbbc800486077969e182e75048be41b4da6fe9bb98852ddebf0a421e612. 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/CNZ632400847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb29d877e4c1028fc714f2db1b626e781b836a783f6598524431947ecaa95b12. 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/CNZ632400932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1d7286f689ba2130e04b0d45ba24ac535c5e5ec72df9fd4cb442881122651a. 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/QNSM12400798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb43f9432545018c560a50e9536f6afeafdbfaf028d757c75881e959ca4e281. 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/QNSM12400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff676c0c48edf40eff5b2b0437f1d9a4c73c277c216790bd63f44cb3d41c056. 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/QNSM12400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d16efc054ecf20c520e8d53082ab5ba7f9ede30758748c528768300198a697c. 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/QNSM12400930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154bea72fe768f115f7b2c453c1819c28391efebfb2ebb61a191e5994f97e0c8. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QNSM12401096.
不一樣(影視劇《我才不要和你做朋友呢》青春主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e455485107fb0ca3617abcbdd79c880e6830e68757d064af4941c188fd5d147. 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/TWCT52001234.
難解的題(影視劇《我才不要和你做朋友呢》選擇主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6d869a04d3a62ba7fcdb9213c3ca06be5552e87cd3d37b1a362fb294be7c2d. 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/TWCT52001238.