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 0x4ab9a82e8e1207435e164f8d70acda1806d4cbec7a1514447bbdc37fa0cd9144. 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/97efa8c5-c014-4e00-817a-b3d3971f4970.json and https://artists.proofprofile.net/proofs/artist/97efa8c5-c014-4e00-817a-b3d3971f4970.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 0xd40f87e38ee23c461d1a4f93004221456541ea6e358f90065026893e645bb38d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEUD42564878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa306bcfffccbc54a3b8f25379bdf7a7cc1766a8ed18babfbb180e3a5818f0f40. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DEUD42564887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4fac5be5678ad666f5400c18796e15ea6282c7690d91dbb8d0a2513b30156. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/DEUD42565025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c41b433c0bee036885da0c8f62185e2fc8a47aa3f1afbad516916612d84dc7. 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/DEUD42565022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b7ba01dd1e981c055fb006797d42b3e16e0aff733a964b8c1fe3c829ca1f7. 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/DEUD42565185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b1b753d92a86f4a9577fe9f15142f51f6cffee9aef62ab7fef9da6faecd3b2. 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/DEUD42565179.
อยากให้รู้ว่าห่วงใย
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e42c8bbb6b68b6a521da3683cc8b658f488931e240670f335ab0c51b391c7. 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/DEUD42565180.
ให้กราบตีนก็ยอม
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b899db9b626995939c9614ea255ba7ad5fab744937dfdd84e7f141d5f6f117. 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/DEUD42565172.
ใจเป็นนายกายเป็นบ่าว
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2273aebecc375d17e0b5e2554ada0b643eabf230f3ff41e767fd31914932a26. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/DEUD42565181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cc88a3c12a3d9f9cd7a0622fb13f6497d6db76eb6ff0d6e4f1350753529dc3. 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/DEUD42565176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f56fbe7ef27c663677bdee99d0ce2670600bb30dfc0059685298d857d9360. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEUD42565184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7544f599188dc84dd530f49854b739e552da0007f91538ef201b0e86a90ea8ea. 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/DEUD42565186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab4ef2558362f567a22a50980fcbd54fc69412d818255b52325c9821599076. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEUD42565183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f9c4c0970be6a6a85065de7280544dee02d5f9ac38600a5a78e5bc79436187. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEUD42565187.