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 0x1dcf942d499b9f618f877b8a7f6517069c853e035de9b3c02cb0bdec8aa3b0de. 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/ed49aa4a-bac6-4b04-92dc-9c3930bed60e.json and https://artists.proofprofile.net/proofs/artist/ed49aa4a-bac6-4b04-92dc-9c3930bed60e.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 0xca84b1ada2b1952dccc843f723d91be7d95aabdc5aed16031c7edfa8be183f5e. 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/DGA052334177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9b1c8cf0f2943d186e25e448c3c7df8424dc671da7f671ac090b848901cd2. 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/GX8KD2468442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc937689aaa90a05c9e0a8daf42d87b8c907b30464a82ad027cc04e06f45f30f. 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/DGA0H2399890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b5161f7d10cf4458f47f5f6d457380516b00bdf61a9be91d02569662289693. 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/DGA082224657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe37817a8c82d654cbba4afc8aa6bfdb28562b613a5e0c526691e68a2cad31. 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/DEUM72408196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad823de4516238c9acaec46973faac0f9507671fb1ca76d2936fed8b9e9e4095. 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/ROBRA2402419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d35575ea34951f5a4ef4b263ed501c3aa983945ad8e161097b5c3963a495a06. 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/DGA0P2387686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68584ca7d1a0cf833012432929e7162fab954db87704da0f5ae762692cbd47. 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/DGA092310235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce826b7bcdbcf203520b3831738c371e007b8bccaa2f3492c77021e57e0e34. 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/GX8LE2469674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0277d0aa261c85a22f07c63574f36b7bad28641aea080c47f7025c87d01f53. 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/GX5MY2451160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d22cd5ed559ad5022bf03ad16528f8f53475c50eaba778f1d769a89788cf05. 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/ROBRA2404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85069a4983e40c31f918349c38d595a9adf1321e69826844c8adc3df682d543. 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/DGA092335488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f7bddcd37783cb495524aa2b4f039a5885c9f884e9da7355eb137c996b681. 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/GX3HH2471645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce826b7bcdbcf203520b3831738c371e007b8bccaa2f3492c77021e57e0e34. 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/GX8LE2469674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff1a2b2fc706582d86c5cec31340be8f3ba6a2c41cfe18ad9bc5e190b37051e. 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/DGA0H2399525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca84b1ada2b1952dccc843f723d91be7d95aabdc5aed16031c7edfa8be183f5e. 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/DGA052334177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac53b6ad99201f074dc7d92957983544b2308a1c422607dc56745162b2235cd. 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/GX8LD2468594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741ccd7940d6296e2f4b9a466101e92554b5be7422384673a591dc0288c9827f. 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/GX8KD2459537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1cc878402366e63e619fee2e653016910395ec1b3dc8fddfed22d93e79942b. 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/ROBRA2402532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d22cd5ed559ad5022bf03ad16528f8f53475c50eaba778f1d769a89788cf05. 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/ROBRA2404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0277d0aa261c85a22f07c63574f36b7bad28641aea080c47f7025c87d01f53. 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/GX5MY2451160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570ffe53e5e5b7cce835eff7550a2e60bc2cdaeb4cc48c17ed863afc59dd123. 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/ROCMA2413532.