A sphere (from Ancient Greek , )σφαῖρα, Henry George Liddell, Robert Scott, A Greek-English Lexicon, on Perseus. is a surface analogous to the circle, a curve. In solid geometry, a sphere is the set o
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 0x26babb137d0da5dd6b2311dc10afcafbb1a83cbf139c806510d9d3e7d5f61d7f. 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/c2ec78bc-d488-46e1-955e-5c47d48d6a0c.json and https://artists.proofprofile.net/proofs/artist/c2ec78bc-d488-46e1-955e-5c47d48d6a0c.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 0xaa29ca9f3cf2b172d3c7cfffb9281ebf7994e073827548e37edb5d8622d58284. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/JPI101200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c853e80e098a91eb78138e2ccf34e3dca01d258e49608e3b8903d5688f0f1dc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:56Z), 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/JPI101100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d48057cc27292dceb59f1c7d54a2d8217bce9986a730181ea5d85c9216be96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPI101000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96120b211381b27fdf282087912c58833bdc32b40a92c177a62b13933d0feef2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:51Z), 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/JPI100900703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d48057cc27292dceb59f1c7d54a2d8217bce9986a730181ea5d85c9216be96. 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/JPI101000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee4ba88a965936b8f7699fe17a4b5db7e01cf5af698f6fba749348434480f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPI101001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722dac5b7ac2abff1fb993f473a8a5ed8932d8eebeca2fe9fba5c16e35a51fd2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPI101001535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d48057cc27292dceb59f1c7d54a2d8217bce9986a730181ea5d85c9216be96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPI101000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722dac5b7ac2abff1fb993f473a8a5ed8932d8eebeca2fe9fba5c16e35a51fd2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:04Z), 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/JPI101001535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c853e80e098a91eb78138e2ccf34e3dca01d258e49608e3b8903d5688f0f1dc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI101100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa29ca9f3cf2b172d3c7cfffb9281ebf7994e073827548e37edb5d8622d58284. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:44Z), 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/JPI101200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1d5eb6ceaf23880a385571cf3b60bdbfe5fbd8118089a666e731ec89a5e9a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPI101200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bc1177e0a2c88850e2ce5185ba498910b8acdcce5b8ba4cda7fe67193f6d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPI101102107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8633c6fe89f653a99780e5250c7c0cdcfde6c7feea1e88fcdacc05b32e22e80. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPI101202382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8633c6fe89f653a99780e5250c7c0cdcfde6c7feea1e88fcdacc05b32e22e80. 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/JPI101202382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac80ee89104833c7a254eae2ae7b4228aed7007494c033186e0c17ad645cc99. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPI101500822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac80ee89104833c7a254eae2ae7b4228aed7007494c033186e0c17ad645cc99. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPI101500822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3582dd15472545c59e5430f6c7de763a21665c720c51d1bf341ee51406e5ad. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/JPI101901625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3582dd15472545c59e5430f6c7de763a21665c720c51d1bf341ee51406e5ad. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPI101901625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221914926e4dbdffacde20e71e9c4003c08002f9b69c4d254cffa2ecb4c293cc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:19Z), 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/JPI102402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642b0b317efbe19555cbb8bc4a79b555a9d8164d13bcbac7905ac11b5b06862f. 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/JPX401600034.