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 0x9ee1c204ae151675b4c3824ddcb2b8bbe80c46ae03ea78c3ecd5e38f84119ce0. 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/dba79563-0818-43ea-b4ff-527f7986c1cd.json and https://artists.proofprofile.net/proofs/artist/dba79563-0818-43ea-b4ff-527f7986c1cd.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 0x6d302341289ad8966c7d2440ac6505067cbceed13a8dccdbda3448461d1c0215. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:28:42Z), 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/NLT2H2100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021d66340cf42e0e5ba10c8a4c589a66eecd861c46ca50208b62b6179d9d93fb. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZPEW2232399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f29ad22d197ef86cb688ba4dd423cc87c04fd5a556987eea4ee5cb0752a6d61. 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/US3DF2238570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856ce5174686b40d2565cb5dfaa288768df66795dcb69c346bccb35e6b0b7c9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US3DF2215863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd6d8342433da1533212ff281d2896332bae22a221e3b564075c8f061a155a7. 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/QM4TX2242200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79480131c3e0ab61d093f7478989131c48faafe04286e1d653af5d772eb197a4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TX2242203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80eb80cf346c9a5b79f08892d34624c30f0b80eb5b423fe5a3669a2cab2e69c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZPEW2288840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd20031b20ce2f09f4714af745ca4974be63cf83cbe5ac791643342a64749da. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:36:29Z), 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/US3DF2233561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e97c487645148c5d15d364e2e40fb8d06c1ea0bd9a523671eb66418603c93. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:49Z), 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/US3DF2273179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d36f57e684ce5a954f397a6145ad8cec4c1ee1d1a3a7dc6735eeaa3638582. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US3DF2291260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c5c0eec63102df19874a63f4c723861d29d4f83de3b0747664d6836f2a24df. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2271328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec85fbe0c66cfe197b0b5fcbf47c0fbbffb06b7762d5f6d1f6236b501c2faafe. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:36Z), 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/US3DF2402188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a79bbb47588613a6b159965724837226fa82823eff67bed1ccc719949dfc6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2143194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2fda1a7ff4b47dd1d17ba53d103dc5f48167de400944ddf9752d3f4b3560b. 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/QM3DF2127458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11304db5059d7b581e86bb684de0e3fc02dacf9e484d2aebf96382b5026bf66c. 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/US3DF2222568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a64c0fa4b47cb7c7921f9241d252aad2fd42d72c81d55bf5748e985fec47af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2237629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445540a21f6209acc6c3967fa6f3a0ffcc86dc6f5d28c94f548cb31417ba4542. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:22Z), 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/QM3DF2159438.
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 0x462c0de1322fce6de03dd7351de04807b045ace272f0b9270ebe4fde9ffe1ad3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US3DF2220015.