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 0xd92959bee4e083e2b68a6d5e8f4367e7105bd9aa8c5bf0ed53e998e52172589d. 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/82586921-e584-4c3d-b34c-d6e4f7b45410.json and https://artists.proofprofile.net/proofs/artist/82586921-e584-4c3d-b34c-d6e4f7b45410.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 0x5880b4e3c6dc55f8ff086a343295f8c81aad9857e679c92cdfc336a89d6fdf82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEA891000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fe04c80ad38727aa6e8f77b537f748ca7b604dcdbbfdd119bcc0b5e860cb5a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEA891100550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc244c63775b50061306aa034124754d608ee3d574638f9e6103d2dfa1e6b23. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEA891100552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1af949d37fc32cfb4f4c6871d71fb377c7d25b2f6c5ede46a49407900cdbbd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEA891100553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad467f6dc72711f1c12cecec011bb9b68abdacbc4477dd7a525e9e3f75b80c79. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEA891100554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f966cbfb5428da743c7f4a0a8094ff0fdf2503266e2fb9628e50754bca34b. 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/DEA891100557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b9eebb4ac835ea195adb80f6b010212c7643dfdfb328505abf015c4100d36d. 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/DEA891600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe751c4f503fadd3542240944b9924dd50618538514c7ac84073a12597db232ee. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/DEA891900432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e20c0dbb452e82e21225b06084533f70657fdc666f055d7a25902da89bc411. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DEA891900439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe543438b464ba62abf44b813a5db8d3bb6f43fd77836029ff2984b556e3d9e06. 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/SE6MP2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36efefbe9787d54a1e8ce498c983fa1904ac242f695613f2830d10df2a9e15f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SE6MP2300702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb190ce4f2eb8bc8b9a4fb3790334beb481b95e5f1771b7153dd7fc8d8d640. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE6MP2300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f82282f6c88a5e7eb6a097dbbc0270df3eb7d9e11d39eaf4ac4f07a549c414. 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/SE6MP2300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f8247b2e8ba2f31fed89e490b6dab89cda87e836542a706d1b1617940a45ea. 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/SE6MP2300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f6308e2cc99d09bb99690b143b361ee980e60a6d269e9f986bae2410f4c7a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/SE6MP2300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880b4e3c6dc55f8ff086a343295f8c81aad9857e679c92cdfc336a89d6fdf82. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA891000074.