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 0xc26f451aeac43b0a6cf2908ee528a776598c52c530e84a7508227a539fd58b5c. 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/a0478b0f-6651-4bde-a390-615f1cd675e5.json and https://artists.proofprofile.net/proofs/artist/a0478b0f-6651-4bde-a390-615f1cd675e5.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 0xed841c0db6ebbf977c889afde98a9572d8969fffe3fc44357ef064e7f700bb1f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/TCAEF1905496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37bc10b14445ba11881d0bb77ea4283c126ba1e5f4ae930bd8214ca103828fa. 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/TCAEH1938862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28159830a937e29910c1c8241011ba1ce1085e1d371c63a6d6366aa6fa6339f. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TCAEP2075325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a04c391ca86330cafc04b9b94898fa9a19f0ac766f559047ef4c48e4df3fcb6. 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/TCAEP2075394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7976d0364f7a17dbfdecd28fdfbc69e35db5a9ad588195f8db3a10031a6021. 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/TCAEP2075455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea332216dedaaf00fb701354585179ebe635cec13b02b9662cb5fbdb6d9426d3. 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/TCAEY2079947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeef34d940f21ed54344d2ecea07d3033c6e9bd65df304ed950d4bb9d0ed165. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM43A2200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab7fa1d37f81ca92045ca5bb5271ddcd18c4b306684326e3153dfd5b18cf6d8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM43A2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c619b6f8d3706edc110a8df89343b80468f87f5497ce4cf8860e4d83a0913b4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM43A2201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8c14338ebe6a9ac69af22c2c6e82dc2b339c896257561894555caf51901a0e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM43A2201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad644c8e314cf8618120d4b48f0a416e4c8c64aa61520335debe3c7e770bdc0. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM43A2200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6269fad79836d19b3e6d7f7f66075a8166b143edcbaf25e5ad0e31e05e6e5382. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM43A2201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c05f45871ab30305b2bbc041807f90124c730e8a566621b962ec1aef5b64d6. 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/QM43A2201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee9d3eec32cda40d25f720fcc57ecd3ff142e2d544bba6b5bf6e37044ef9661. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM43A2301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938beeb55bf6de0330753d86a9b5370aa7c687aaf721495a789b49fd607c312b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM43A2301134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ec6d577335da8f3ff92f6eeaae678ed3114fa1e1d4e6385a0e8405b5184697. 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/QM43A2301127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1717ba4d409025b89b241fd764d6469ca962e2fe7c5431ac22d4dac516243fdc. 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/QM43A2301128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1771bbd9910c4c9ff7e7d95230331d03ae3a68f98a06cef0db7d4679e070fb4. 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/QM43A2301137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5dca43d1a058643ebcf5349db31bd251425eb3b4c9aa3d01d115b1cd633e8. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QM43A2301135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24466c0d2d450feb85cce51af2bbfb786d69ce88cb1bf95b107ba568b7617e01. 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/TCAIX2496377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b579f7873a3384d4a365aaa2130bcec4b7c38e8569baddaad53d67db320a7c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAIY2474021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac46ac9920d6582ac3d4a782bc4936827f344aef02dcf4b09ace3e733ed18a4. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/CH7811114817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983257af2f9466c29f98f47cc5d543aabae0577f100234ac45430c8a54ecfbd4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CH7811114818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7264dcfd1ec8762c6cdd7f47a93cc8fe89bbe2050ee73422e26762f1ab0215aa. 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/CH7811114713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585661c7a894a9dafb04004b8994aaf7ac8c3df96c799aebdc968cf4c919c0d0. 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/CH7811114714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1c8f712d4656e4a7d0768b6daa351a0f9f66f9a899afda9658cbd6fe98f16b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH7811114715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee9f0c50af15db17e9d88a8add181147ba3699022ae84d4038ffd5a90e41f1. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/CH7811114716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa576f754a5dcc15f3c5ea09eceed93825db33866d3ff6e2cd6646111a51416ce. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/CH7811114709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72440e5ed74ffa3bc6c5f7b71eb5476fa81c418d17f2fd5423a550b0c80ad5d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7811114710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d088845db4d00c224940987bc5a0ee1a0493a0f04a0c4eeb9e0b6024fe7b4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/CH7811114711.