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 0xd8f3af346c4c43b85ddad5da8c226e0c6139f8f42a4dd47ae7d64ebae7087ae2. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afa01370-06dc-4cb6-827f-afc6b6bef474.json and https://artists.proofprofile.net/proofs/artist/afa01370-06dc-4cb6-827f-afc6b6bef474.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 0xff2cb7d1cbee1ba4e171520f4a0a6d8bc06b367d44686b9a8ab7243a44d46973. 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/DGA052408576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8436a6678efaa972d0c448046b4f91a048791dc8b1f232b75b37cee644d08d2. 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/DGA052431101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa028239e6b69e8d0310b0784be41aa9a71765aec3a0089799ec8f7c921dbcc3e. 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/FRX872439392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3393f5abd97839e8dd7ca4b80d6e16e0cff2225f7168e9e5f726b2f408488f9. 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/FRX202460729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660972af59a3bb55ac44b1ea38b7859e8b9d139bb74d4568e272d8a4f5b23f0a. 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/FR96X2474585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5121af8c9bb6c85c63d04cb327bce01de157a3d0071ecbf1827ddffeb548ae. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/HKG731682436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757f880bb0b4d1fb010e5dc17586d8b464e650acc1a645c5faeb0580860b399. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR2X42457842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b93bab02467f94f0af24604f98398eefe237faab0197cc34a535c3261ff07. 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/FR2X42418194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449049bdda485ec74828fdcc0cc2876c1d12ebac1de98a58b52a84e5a51a6095. 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/FR2X42418195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6290067a1f0c4098438a1a942ac9de77baf75b0436cd3b40f4ad235fd820938. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA0R2330678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcba5301a196192a2a8458dbfdc4ce66cd41b1115a7db8779f5f1d2a423eaae1. 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/DGA0R2315030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce22b31a8f5671813fb9fec028364483d55d30812300b999ff33ea2dd80201. 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/DGA0R2315031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff07c3fb13f2fa38c248b1d480d28230ed50093d97335f8083a8642759e2a23. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA0R2319917.
这一年又要过去了 (我期待的不是雪)
这一年又要过去了 - 我期待的不是雪
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4c6aa1b07f13cc68124d4c1bf6f32a222fc6dbc878ba8c61e11c19f064df40. 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/DGA0Q2327626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe1c52b3b7b3ac93b1ff93d43183d0d615c1767a8b7c7e798b424600a2c67bd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA0P2332186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4482f21f2cde415d9d892be501ad294eb7117770fb946290f31a3b3d3e9de369. 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/DGA0P2302419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afc4d0df07ffb0a4de20de6ab3db746d6fa0311576a04b3b30abe41334e419e. 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/HKG731402480.