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 0x23918d3ace7d93b954072296b036d78a92bc99094f600fee1a53eeb6e4603fc4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0076bbf-8fe1-429d-9ec9-e282dce9f414.json and https://artists.proofprofile.net/proofs/artist/b0076bbf-8fe1-429d-9ec9-e282dce9f414.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 0xffefb628c50f857b6f6f713c76b9cf938852e7b65fb16498fd79bcc5288f1fe2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6K2383812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04433166bd575a6283b0ce6346b53b7e8d4420a8b0813ce8842d641713677601. 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/QZK6H2373246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffefb628c50f857b6f6f713c76b9cf938852e7b65fb16498fd79bcc5288f1fe2. 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/QZK6K2383812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041e3a2439328159eb5ce0591a290f0f30c3ab4080f909154caf6883c87ab7c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMEN2104456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e12a095989a4ff4bc9eca5ae68632920051a39bea6417a3ef48ef3e2abbd84. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ62101082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d397ff2db8e48e44cc1474af3f2d4e01f70caffdbbc20dd1de5ca955e5e0e9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNWT2075419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd8235bb80546dedd2a9b9b60f422a2a4d7e9ad39eac6b710a6ef4eefa93405. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZMEN2075768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6870783ea3ef41227cebed01e3f5753098fa4512938126666a9899196c7497fe. 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/QZHN41923305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a741b475af0032c69bb6495851c07db291eea60389f95d47258bebcde89b55d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZFYY1997513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48270ad28affd3f4f2283ae32a1603c2bed071f877534cace01c4f240abdb8fc. 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/QZES71960768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed069a4deb290e1e559d8eb81c5a6167024aa2cfc763bca8b7461ab9c2ef63f8. 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/USDHM1815776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b12c7a6666c5edec16a9f76b25ff567407e4ae9d0bc89ff1e34017d040d9c. 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/USDHM1826391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361de0255a998977ba6a5bdcf42ecb3802b02e8d74defcf181de624904050936. 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/USDHM1826392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca4ee2215d1b51c10c36eeb8025be50f59ef11fa184de3478111e0777528f84. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDHM1826393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a865c199a2c3264ed21feef4a6f8ffc335967f5477e286c10b32cfb21d154. 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/USDHM1826394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936d93e4f17e56190c08f380711cbe4b6b70f848b09593409942f4d367f3c5f. 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/USDHM1826395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce7460058e7efb7ede984734f66329f98f942ece7a1f0e1f8c0841d5622cf7. 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/USDHM1826396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a42d8ac594ed8d46ad61c09e844b9ad57e496719b8007d65454530bde7342. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDHM1826397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6cbb4766bece51484b165237d287c9dd50d6d5a27b14a5885738b9749194f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDHM1826398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a2b8952637e5f2700265a0296f935c3841547ff8bed398c768dbcda8d7712. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDHM1826399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241953122093c7d43d1a088c1bdbffb4e5f0a6baf5e4718e6a225c130a729a6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDHM1826401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf076b5f7f62696a45deff4c8b7e34b0640d78e7c41903d14a4963359413800f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDHM1826402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f94bc58c85db8a0e41bda0155b52a072c5f38518904ef84b798a78e9f80d6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USDHM1826403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b633f029a18bd728181ff1eca267e643859244279deec6ee23a3ae51ae3e5d. 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/USDHM1826404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921236703c54bca4ce060c93029a6a3066255319c7fb58dde7422bc4ddb88862. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDHM1826405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3137a9c426d1d71714150cdc98c539feb486e48b3b9f798ad379531076ab47. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USDHM1826406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346e1d26404c7c0fc9a2635cafe71bd695f0ca9c50e7a3a506302af8bf18ae8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZFYY2007426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xface416d39793e5d72dd7520c4425b2224cf9a280a4cb26b06f9d3fd62d2903c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZFYY2007428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d57fcba05180fe1b3e9a10028ca9aa7e3b0731503ad3a2fc8efac6ff9137296. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM81860509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8ec55c00ef46b65b8236c531dd32117ef0f7a6ff308dfb6ab389deeae5ede. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2069941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82a7fc126d8d888eb902a080e8b76cb783587e287548640962b0574addb26e4. 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/QZES92530074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc765a287c49b87c219948cfbe882977e3c3ac99da8af8a9f5f086a1855dd318b. 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/QZZ7W2463065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f78e6408c57554bd34be70a3f9f22bd70d881a2c68dabe58affdef86066b1d7. 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/QZZ782473818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c14524ab99586d12e1767588b05246d0470bbc38dfc4b565937df3013b6f40. 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/QZDFP2149900.