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 0xe755762a92d15688881c20f0ce63110faa616c5e2b87970a0f47e608d9022e1d. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f84693b2-ab26-4b94-b6c6-2752eee55154.json and https://artists.proofprofile.net/proofs/artist/f84693b2-ab26-4b94-b6c6-2752eee55154.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 0xda71db1431007420df1d46df710a7e9c663a53f966f170004ffaf86972b6325b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPS801945755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3051271b2afd3202efd8f43b8d4d1d5db99ff91216c403ae173fb55a5c830a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPU2332498.
Sweet Suicide (world's end girlfriend Remix)
甘き心中はプールサイドで (world's end girlfriend Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcad188634f786534a8807b5256333912dc5b55649adef45f70cd0a2a6e187. 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/TCJPB2481220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcad188634f786534a8807b5256333912dc5b55649adef45f70cd0a2a6e187. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPB2481220.
Cinderella Complex - Remixed by Yunosuke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c54fd2bf936e187ec11bafe0d3b11d915752a83b1a0cf51658199528afe29. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCJPB2481231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b438ad805b72f7dd69eabd10b7ee2157bf647e25e02971d69218741b85fbc0a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPP302400861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843834d299bea55e3dccf13b09361a47527559849275c1035ea6bd7918644594. 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/JPP302500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05200ec49bf793ed5cc680fdf26112e8255a8976475adc216972e7fa54da5702. 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/TCJPX2312823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9933a63c532f667dd44e9d07f9abbe5e8f3cac880725cf89193c47f713e7e582. 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/TCJPX2312835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b917cd990838dd95333ed38de3df92bdfa769ec8de7099a5d2f93504105c5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCJPX2312853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c6f7c8685420e934f5d05c7c2663e84e311b7a239711e9cf2a1745ef8131b7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPX2312856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b22d3c3eb83d52f5f302f386786e634908c9ff1706e7cba419ee802b372d7. 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/TCJPX2312858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74df59c9feb5d072e7d039f8c55fbcfa296aa99aeee0b91a628f948f3e6da07. 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/TCJPX2312862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce0f3cc5557e171a56969bf9d5ff48aceeb607ea8d14dd70cbb9ac793db24d8. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TCJPX2312866.