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 0x6c1cf9513a94ef1691b87746fb3810725bb92896da528e90676f2888dc08499b. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/590a82b0-1ac0-4eda-a3b8-5a49032d0819.json and https://artists.proofprofile.net/proofs/artist/590a82b0-1ac0-4eda-a3b8-5a49032d0819.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 0xa0349698ff7782c1c8ec973192b6c287766ab25961df21fe39355b3fbc44f593. 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/NLGM12148202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55391f38464d8e75cc93c7be85e09d2f9f1f347b9d71b4f4d1ac18a09f5db116. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NLGM12148204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb8051e7442e96c4bbc7df59fa85fdfa0ac3cf5ce2832efc58d53feeffad64c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:26Z), 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/NLGM12148212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deb67132cec1c12edca25344dcd52aa4c3819ce4d9a04038756f96059f67e8a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLGM12148187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433b7df523fa332c3e417ca255f89765d705d0a3ae83067d57fc08c7fbe66a19. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLGM12148189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08aeaa1531fa564ab64723286446874d3b6c71543c4e8c149eb6f5e0077bbd. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/NLGM12148190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697d1863164faa7b959e178d04fb4f21d91a94cf819e0cdae9138ec9520c791. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/NLGM12148194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89b4c294fefc4ed51d32b397be14ba23cc581bd5388d440431ee40bbb195b3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLGM12148197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3402952ee834a15932ffde9328f611f48d640d69a5b5206ac37caae926a8b47. 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/NLGM12148200.
P.柴可夫斯基 -《献给年轻人的专辑》(继舒曼之后)
For Children Sz.42 - 7 Flower Song.wav - 钢琴音乐
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10662219c5a6247faf04195535390d8f15be1297e011fddeced0fd74cdcaa0d8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:36Z), 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/NL6VJ2306344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1377087cb3630f8a7b53e47de1ea9ecb3ae6b64d2c96d35bf708f52c43247. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL6VJ2426146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a502b7751c9268460dc6b50acfa056c369faee6be5fa4ac620e4e04941627cb. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/NL6VJ2426147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2582e7927d141183156498ab462442be026598c18a024774292d3a084acf0e8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:45:51Z), 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/NL6VJ2426148.
P. Tchaikovsky - Dance of the Sugar Plum Fairy - 弦乐四重奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc7591cbd5151d37a04d47f65048232ff99929110dde73225dcd4c88379970b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:32Z), 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/NL6VJ2426149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86592045e1d6b57e5c4b44b859c388c0ce2784d0e3d67469f31ef4aaf0d7f321. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL6VJ2426150.