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 0x40d5fc47ba2f6f90a1199f3f541052a668456d5fd3647027123db9edef5be923. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3d4091e-1b21-4e5b-ae09-674eba355e7f.json and https://artists.proofprofile.net/proofs/artist/d3d4091e-1b21-4e5b-ae09-674eba355e7f.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 0x2696353e41bc73ad09ade5c8ae4e691f5e2c95f9dfc4a99c2e7557269ce08561. 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/TWCC32200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473f18cb4f13974e1118fa79bfd01d1d3b9ea164dbb1bac33230cfe16f36490. 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/TWCC32005909.
饒舌巨獸 (feat. Green Father 比杰,DJ MR. GIN,林可綸,西屯純愛組,PIZZALI)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059276c6175dd731fca919c0a376afb559f257109d6e204dea83bdb8efba6dcd. 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/TWJ012500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f13f715ac6b39b17693420fc5230870f94ed6dc1712df8310edaf2813723142. 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/TWJ012500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b42477c120c171a88b9b25bb07754b982279c237d0090434fac762fc8ea8be. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWJ012500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41faab7d6b2dbdf179bd49178c5fb9a2f82b25de4ca761a5dc2ac55d793514ea. 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/TWJ012500104.
我還是饒舌歌手 (feat. 馬訓,阿雞,Gaweed,洛克,魏買加,顏冠希,喬智)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7654ff59cd066dcb22955934aaf6d6d1ddf3ebc74f8d346a0cfa99978f5c688. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TWJ012500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb431c58a56c9650550732700ad3ad98db9207afe0b11cb41702771db24eaeac. 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/TWAE32100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb431c58a56c9650550732700ad3ad98db9207afe0b11cb41702771db24eaeac. 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/TWAE32100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ded063352fb23f1ddc668441d0849968339ed37a8f516c54962a4f93e7eed6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWAE32100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81910e6e590639e9f04b6580cdc155b3887057af5f30a036682eaa116015a392. 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/TWAE32100448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67566409e53ad86b4aa700ce5e91a40cd2abb19d5084df8478edf3a6e6644e0c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWCC32414611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61abdb565871a267d08d54c1a1b2d56a837a42020e0340fd88a84b1ba778d5e6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TWCC32008894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db3b964289e7c405bfd52bc721c812cf98976d562fbeac65a692d34cdf03406. 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/TWCC32004084.