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 0x8bc98dff3914c2e4ef086ec27a7b9615c9f0418a4c91b25433cc0c931a0b16b6. 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/5aa64513-985a-4bba-8190-6ced9e02b94c.json and https://artists.proofprofile.net/proofs/artist/5aa64513-985a-4bba-8190-6ced9e02b94c.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 0xa1fe6d60cf30c17d2e982e7c99947dc9a01e0cbeb79df2930bfaa82fe4d8053c. 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/TWB511383201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981426019d33f16c00fd9bee055a0418b6a44bb9471e614be37abcbd8bb00cdd. 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/TWB511383202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cff84dbc9e42c391d8c741f3b872598b5e67f3959d208aa0e7aa8d32aef884. 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/TWB511383205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1489bcb176a8f3bc08ad13badf191857da931bea3285ec5fd2ef33184756240e. 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/TWB511383206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ce4eea81b2fff369eaa600e2b5dd876f679a27ccbbc16f6c133fc8112f81d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWB511383203.
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 0xfcf4a0ade40c3d0758eb7d9cf483ee5c327922520cd74933672b1169812bee95. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TWB511383204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725602772319da3233862d52d1216b39a48fef6d82d9c3fae4e722b7f2acb300. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWB511383207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812912de531e53632fd2ecdb658c7254369dc743dae356024c7883831d59095d. 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/TWB510965406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc6b2ca48193956c4c2ae168a924531a2d97ba3448ccd48837fc27a9a6c823. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TWB510965407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e80443d27b5330f4ed0e1d9ff453a49bda51e2030bc14e3e793fdb90df094e. 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/TWB510965401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d481a7c9cb57fcf994b93b6d8d095fd8855c91a124627e3eedba2f6052f01. 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/TWB510965402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9901360a5d5ddfc3f838c515b9ab1d354ad99bf3e8cbb9155acb1fd78d7d4. 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/TWB510965403.
童話故事 - 潑水歌 / 春神來了 / 兩隻老虎 / 天黑黑
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8d5c931d03e67dc31fdf48f9745e3214cbaa654bb1e8ada25089df9ec2e7d. 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/TWB510965405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cf4ce534f50d8dc64f1d0b43ce5e06785f321ce43ea1007ec468dbba1fc039. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TWB510965404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad10f9416ef4dfe782d5433788af7cc1b0d9ff933ad851740c8e5f8a409ee967. 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/TWB511172501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbfe0110e6987625a3d6172db7667815431dc0864046b9e06ad2f8bdc46c7cf. 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/TWB511172502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7849045d3ff65c6fed5e9afe873d44db77827c53d945a2ebcf60c358b3318. 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/TWB511172503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6247aac1e4c01d5e962f8731730de0f71cc8c540a6700d316b8e4581cbb60b. 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/TWB511172504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b047a5d9de7803cbe73a2c48a45ffb58f60a387f291b5a1de803bc2db378c68. 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/TWB511172505.
加加油 大小姐 - 加加油 / 對面的男孩看過來 / 起立敬禮坐下 / 怪獸Lonely / 老師老師第三集
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5768cc115701af267031b557c4833f2022f1127b57dd425a652380a15478c17. 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/TWB511172506.