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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354bfb8368cc11ed4a079b00a8a02499f78a0c9688919bc76f9a6dc3ab522f95. 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/4cf626aa-112c-401e-a5c6-4b4a906e2f92.json and https://artists.proofprofile.net/proofs/artist/4cf626aa-112c-401e-a5c6-4b4a906e2f92.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c77a543475a96b9f01ba86901138d8633932a1aa9b58bf29f54218b3d8405. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FIBAR2400673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6477681cf24b6a3cea3d8733a2e777e26a85420bac7431ebc3e7da614442c2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/FIBAR2400674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa863970c2f7f1f0bfecd5276f71bbe4f9196b7d474b6ab9d3b366d4a6f50d559. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:45Z), 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/FIBAR2400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdfb0975471096c4fb1304493bc34787344e7358fd44062084fa445dd2372e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:05Z), 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/FIBAR2400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5ee4e3d3418b4a8af126cb2d4fc7802d35b9df24ba6f92cd14372794ed430c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:15Z), 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/FIBAR2400677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c11ca6ff71aee9174d3002536061368709dfff136c09081736a148d8e17ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:27Z), 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/FIBAR2400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dcb18c4d0b82f8a4bc363bf8364138f16c5d3097ff78f42cfcaabecf9ea859. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:57Z), 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/FIBAR2500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4cec7b0f62f9e85ad7eb6dc7148ed56f139fa4762294d852e1867a286878c1. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FIBAR2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2068358a6d56706e3f26223afbe7e88facc256448979927b52df9c32df723f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FIBAR2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd51f2cbe09afe7933ecbe37d2fb23ba858d55c36b3d6ae0e8269ce78e75baa5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:06Z), 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/FIBAR2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed20fc65fc8f76f7d3ee6864a4445ff83a2f1cecaf85a4b65fed664ff123473. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIBAR2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907ece58e08e510c6a1976e96078e00fd083722f3a95f67533c267a750d49d71. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:51:27Z), 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/FIBAR2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162ceb01665daecb44c99328eeffee6e20631caab232886d952541b5fcfa8de3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIBAR2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6392b069b623ab32e38cac3645ba79dd18e6049833a3452aff8f6331adf54cf0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FIBAR2500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39306a95928a1032589f735c9ee6369afc3172d3a1d7fb955e9bde59a1e98b3a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:19Z), 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/FIBAR2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4a95c1980c979ca2efceada7a33db87eafb4a9778b99e9e20d952ebbcc929f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:43Z), 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/FIBAR2500066.