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 0x1798020a7e3d194c5f91adcc464d09d9177cdf842d928f7788c98790eb7d66c8. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52ae5d01-2113-4b26-85f8-3457ecbaa71a.json and https://artists.proofprofile.net/proofs/artist/52ae5d01-2113-4b26-85f8-3457ecbaa71a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing Street : Original 1931-1939 Recordings
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 0x591afbc8b5caddcd6204428fa7584573f23c4bae92e3a9f7277d0b538c0ae355. 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/SE2IL9500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dac891b33ef4115458d7f760bbf20cc3a8bdea53bdfa488e29f8748db1466c5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE2IL9500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaea7c5a9dd0fd5d286e0dcdf4696eb77c38f933eac462c661c328bf112c045d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE2IL9500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10adca253e6b3f12900d18e9941b2831b0ea48c759a8837eff29cf89844beb4b. 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/SE2IL9500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d988c4cab0bbd6d69e53bfaa03cbbcba2d44801ae7fb64243adf833a21407. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USC9R8401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f45d0c1291655fb4452f7c936a688194861874173b68e75ffdcf24c99479ca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USC9R8401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5586a03e0872d6e7e784b2beec2254b01c61ca2b7d35f0c0e3ed02425fa107. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USC9R8401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c80fcd12b8b77add93546100e0c62b7e7d71dd960b2a9b2a234fa698659dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33681f1a288a0ccaaa1f04af0438003863ca8222bff18bdddd038f6171bade8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USC9R8401405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d12fd6c26799b39461bc686a0b3db9e25c3b9a36831ec5156133d230ad09b6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USC9R8401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eebb3ab5f13fe3382810d0e1e59293a418843308ac38fa7364cedee05679234. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e2521ce0a8dc783588b019bbfa112c1893bd70e3a1a73c4b011c9622ce31b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e30814d2f066767623e4e870ce3a492916c0775195166455ae84eae35b8217. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0b1a1071aacd210d374d76c26674e6d02a254b078e3507f91c6f212bea877e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USC9R8401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a364fdd65ddf82b2e8341f7b6262ac025d1be3085722c4b7b82f0d84f2d57. 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/USC9R8401411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37260aa6f18452f9382f65dcbc9ace0dd774778db975cf5e41d774f1a3fdc07. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94606c9bbcd52e9508c88274c01cad9f943b69be806f7daee77869a1aa12c4c1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USC9R8401413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5591c0c9f7a2816675f65c26dd57c6f7a71bdc34d3de9858ebd96ee9cff27563. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USC9R8401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2e1829d36503c662b43d333adb475704001de97c03dd701f7e515c2e0b144e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USC9R8401415.