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 0x3e971a1c81aab813e93e2338d7c83736afda8959e2c4963eda34727606466786. 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/e9948236-2d5c-45a3-a111-e15117e7a27f.json and https://artists.proofprofile.net/proofs/artist/e9948236-2d5c-45a3-a111-e15117e7a27f.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 0x645c795819069171b42ec76bc149ca92f9434d5eb7e559ee8de9393ea4441ca7. 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/QZTB32381558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da43778f2031cf076c3f66d5cd356d2d0f5dac5f4290c23d0dd888262593b3. 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/QZTB32381559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe007cdba2ae6ebb92145ba49cd174deef706c486f8a7088f000769c0a7b16. 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/QZTB32381560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2356ca00aaeb6030c139adc53aeddb7813f947e54f92087229ce111a77bc27. 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/GXESV2400895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a9b3d2c91b323e53e8063fa3d61871e969940bf4916b267a821d63fcc9334c. 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/GXBDS2449163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282d8cf8a5a8f9bad6f37a651b4c20fb40338b7570503177f7d498c42daf08a. 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/GXBDS2491772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb87067d24da4d9f7fda2470189a851736828a1e57c8926960d2d25348b222e. 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/GXBDS2475772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec500278c2b6024ba9d77dedb25b9b811cc0d24c30035d6eb9ef29b79f6f96a. 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/GXBDS2481257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3524b4b8e1d7bab0ac7348d16332646309986d30f20057128f627578445bab29. 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/QZFZ22464142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42807326a794502cee6933321b892172f18a1197e371a18859dfb649a459443. 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/QZFZ22464143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37e4a5c9b66188a79cc14fe0510249a940a5bc33c71e90c22621b9d4be1ff7a. 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/QZFZ22464144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84da4fe22b6a8a03f15bf90a7529cfb548fad1d0f16c5d72d844e994bca41209. 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/QZTB72358291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87504e65693f6dbbc69f86181c79306e1467fc079e174b6a6c22a32030e87b. 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/QZNWW2335687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e5a756a2a6c00fdeee403cda0d289ed736e1c5bab538c2c03908d8c6295d58. 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/QM4TW2328824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93baeb31291f621651a7c21449f9faed556b159417101a24c465d2ace329b5a8. 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/QM4TW2332961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9255cfa983580005aa982ccc5160bc8f484efe6068a0b9b78f6a9aec03be0fc8. 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/QZFYY2311942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83091b4fc5ab9738f92a5e095af29287a3cf19f4544c7ba0f529e4264ebe17c1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZFYX2329854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807db5240a03d1248b56a8e960e77015be466175661cffce77e68104f88a7138. 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/QMFME2206610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924f16f2e10ff909a896e4574eb31fa01df492b6fc752f8a4a1613285d588dec. 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/QMFME2206627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e000737c78e7cc2ded307878a67c99dbfa0626641ad03173a553c4634f6ac. 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/QMDA62272369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c3b8455f7aebde8a157d1efe65437a327c001e6e2175504103b67747d5e25. 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/QZNWV2209990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70595ab9d0d5d133f6150029fffc0c657e3383a6acbbdbed0f4b0618081bd9fa. 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/QZMEP2253145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30faede4e246a285708d31181ccd831236d3b7c2ca4c4c3add966923d5811fb. 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/QZK6L2217203.