Distinction, distinct or distinctive may refer to: Distinction (philosophy), the recognition of difference Formal distinction Distinction (law), a principle in international humanitarian law gover
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 0xdefacba9567b529d82ff2e0f992698374d598d8777cf6e1c57a9e9050878d19d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31387f0c-0604-4cc2-b900-c8fddd29d9b9.json and https://artists.proofprofile.net/proofs/artist/31387f0c-0604-4cc2-b900-c8fddd29d9b9.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 0xcd56ca2f2f45f852955282d5fc373cbeee8b619cf520ce0032f28c1b8456fc15. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLG3W1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb273aefa7a506c8224a38ac61c0c46902bbdb593b6a6c04c575e1510cf461110. 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/NLG3W1900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd535303bebe11ca113fcf4adc6841932c468dccd752c8fe988202ae2baedffb2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NLG3W1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f591f96145a507c2ad83f43e34765e1e2593da301fcd77c34f65b4382b271e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLFL72100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe236d46d975cedf3523f566a00777ceca608917a9696b6d44bb9a81e21fe69f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLFL72100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0b3ac2d2584d44bc38e38d31ad21bd9588b6f6cab00ee4ae1ab556cb631e90. 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/GBLV62206588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c4ccd50daea8e09d4ae5c189feced0a2efadb2201e46cdf71cdd720141b0c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTB22267907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178b63d87ffe98382de0922c495ac41b747dd2f95ca53bdb019611f6fecc36ea. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/NLFL72400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44221b89be6f934db7e1ed3d2e74e651a9db2c31bdb9712fa63180c3e90d446d. 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/GBKQU2472165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c62f60b69e3b61ba17eebb6f487f45b739b97fc1c0ffe9a3612f528ec5312. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZRP52425628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebde887398c3de81910ee97cf4954e43010bfb46d3dce740b1fd64e78d49ec9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZRP52425629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828deb965932cdf7f058241f1988fda8017c8947db8729ad7b0870fe707581e5. 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/NLFL72400668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb03efe49d924f07a8a307e96fde9dc9d3a99b5f8f63e020998ab7c4bf8736f9. 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/QZFZ32588198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b66b2777f9d406cc44acf6666e21171b0c633794485c8b307587398f3f7b4c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6P2570611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49eabf8494fa726f6c961cf5469eb0a630b3c62ac246c2e785fd0da611f5d7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEQ2598720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab4c976415aa6a54495b324fcf819754fe58a2453bef6231e56d334943981f1. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWW2539787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ac089ba1a58074b1d1d61b87ac0f0d1fd0dc72bb55634c19782849d45bf68. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB32510736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaec4023981f79a5042d6c5ee1d873e2ee54cb77b7fb091b279beb0936a88812. 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/NLS202300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87e0db7f6ca16f2d2a31694ad16bda9e20ecbe43a044a2258d1f65a4fe788a8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLS161802570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9378692434dad4c80f94d9eb3adc74cd227b9a588486c684d64d112a4f5e0fe7. 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/NLS241900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42690547c0b704dc5eacc70246109917ea8d7268948b6306a664dcfc6f439099. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLFL72101229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda2f165e79a1425735a9f6200b8eef00ff3b297aa060e34909c35997deca2bb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BEFWX2011805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38afa2415e41c6d682d541a15b3804add3f38ab47c4d92e5233ce4e08819ae30. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/NLFL72200363.