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 0x3bd3b348bba7cc65e78dafc377667ed7b3254cecb2b2a7f786af1567e762f2a1. 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/8fb33e33-cf46-414c-ba3b-47b4f307748b.json and https://artists.proofprofile.net/proofs/artist/8fb33e33-cf46-414c-ba3b-47b4f307748b.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 0x05d9c980f6d658b11c577c30dbf36a2bf1491c4acd21868fd8f15c49a53ab610. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZEC2324285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82028b6ad91bf96f7f950cc449186a593c3aaf117908d2a6a59f4d6d8753a3a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXD7G2374093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01c349749af5786d23ca2f280634e1e58e3eeb0d4a766f574adbd1a927d596. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTBE2310165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15efd78baeac12c3fa56f448359520503cea9d120101e8f49e04aecc8a315bff. 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/QZNWT2303831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc2d02436094891fff292bba94d936374c709121388bb52f0c1f67be609f666. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6G2312924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c90520a5405da3327ba519a75818a31b93c0afe90c5227fb580321ee3a6df9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES72382129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a369785c3669c74d0a0053f6f1f2fc490328772bd8c100ac93df20df38c2cab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6G2228126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ddc06dde27978e2ddb30b3926c2c629129f27f3a359b3d0598b7c963e07b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN42236192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd5f1e71e8f71db27af91cb8ec2a2327081445659e81f309c09bc395c0d957. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52227004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d877dece0016e7eb674e921754f10e50ffeb5d4724b793feb2c9b7d1b6128c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ42237683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3628aab7123f0c823eda4bec5a5a01f8e1bf003f5f86ce90ca31c4b1bb4a56f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLS2414813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbcd5bb2ff22841f55103a16bc8916914e342387e4269e897f9baf75a377ca6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d6ced16329484f14091da718c4fa12d9f653d5a52fcb46d98ed79e66c6640. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMTND2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7502fcb0cd8ea5c3b24838d83a248210f72e5721720fe67237509ffcd67beacb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25f8d6c855e29ed3e0156dc89f8879580534e17e83f0e784fc1686c7cee9e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890e0bcee98e698dd7a2a17ace3e2f93e30873775dfe6cf8de182f4ebac5f663. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87babdf748d69c8d7e6199cdd0e26c224da8df22152bfd89af45ae8dab8e6a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e223fded93d46335a10d2549a3a49477a91754e659db420e424605d9e2bcafe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMTND2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c880a9457fccfb5e8b108b7cd90c154c45735ff943205d269cd63f714855e3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMTND2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d3ef99e3db6d06a129d2e82ec275ef5b746fed67b49f135e50982198d8478. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558bc5c7d5c4ce552698c9a925b37fe492982a96f4eddfd3719fa2b0cc7d7bc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a0aeac15e90452294036f0d9cb91abcb51ae38c893e54a0d50034bb1a5aad3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMTND2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27758fba896a2961619ce59bea6ec018201786bbdbfcc1ee4e5a5a54aaa28c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd515d33a8f2ef5f65fc733b4283e0089ba782d1084169052ae7459a6213bc9d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMTND2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05f2acffa88c5876976e41c5a218c658a2c0d4a8b9b142886bd1942257c06cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMTND2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32f8b0eda01937dd038429fddd59b0764f76e08d6ae0fe1e808b9237af8a11. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFJ2457272.