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 0xf3c98ebf17063df48e742ff1f14c547041fb71402f39df554c1f62c87acc1cc7. 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/51b3d880-d3a0-450b-b953-6d95647c36f6.json and https://artists.proofprofile.net/proofs/artist/51b3d880-d3a0-450b-b953-6d95647c36f6.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 0x37629c88d6acea40c4b03e4f8e2fe52947be9135ded3aa79e9e07a9e76899c10. 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/USAT20506614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694dc39d1308ebcc0fc34bd9d34791c3b4a0091e04774420eb02735a2d5c82d5. 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/USAT20506555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8265ad23db0aee2100bce548438016a6d91094078d2f41041faa21e4aa5221d8. 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/USAT20003573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdbb02d2705c5d7bf9ff42a17f9280d48bba07c0931ec6243d74b39ea455ba. 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/USAT20000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb3ed0c62a813cc23d48cc0481eddc3ef82e3974ad4847e4820500a4d83c6b. 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/USAT20100512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50754a234c05eedba1ea83e839b5c6081406f07b4e16690208c308c2fc5d0132. 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/USAT20000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bfdf6420a9c0b55ca37279a6be4dd9701a4c0caceedf4927a5d9e67d45f9cc. 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/USAT29901705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbdf089d66fe9d343521b9f3dd67e15c5027975b95aaf10921773eda0a15594. 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/USAT20000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0fd76d15f56e420dcf9ac49a1c14acbfeecf98e82d10f4fc1266e0eee20dc. 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/USAT20000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e7759ab93161e832f8bbf59e25595dc3e03ba30958723ab2d791361ec5d746. 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/USAT20100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3a203a42d572a3a3e28ec5b3117aa6ea1372239c594b07a2be9497a2a180ff. 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/USAT20100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5070b2a15aac2c67905bf1e9dc1ff0548e7f170d4d039f86ec605ddfe165d0. 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/USAT29901700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162afe3dfb357076955577bc36543b1da2a33214447b1382b100ca2fb9cc735d. 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/USAT20000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba3d89cb3a153ce645b74fd78ddda3a4faaef5e9e746e390a99c68744330eb. 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/USAT20000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36359f6847e9e812df566d54661d255c633d29dec7ba00de6f00e7a8ae58d5dc. 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/USAT20100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d9ad6acc4d892ffc89c8420bcbc5b1eeccc4aa8988cbf16ebd4009252f49ed. 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/USAT20000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4d37b7b1ab805bc53558715c79b0f8598da25e26e31f36693a12d5e6c7d3b9. 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/USAT29901699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7fd74e766e3656eb554590de1fc897ef0a790e576bb0e5d717e17595651347. 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/USAT20000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6c3019e902cd29b73ce4cffd016ef8b100fcc94a0e6683d727906953f9c3f. 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/USAT20000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d95bcea565a1420432151d502229aab805f99757fcb8349663121ae42575e. 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/USAT20000095.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe02d063b882b8ec43b3ba56ed42dd876301bc273ab909527a2fc9374bd3d67. 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/USAT20506563.