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 0x835e02ec697df0d6d2b6c65d435c65877f7457be8638be3ab847e39407a7f328. 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/e9be500f-4003-43f9-9bda-4a0ca086686d.json and https://artists.proofprofile.net/proofs/artist/e9be500f-4003-43f9-9bda-4a0ca086686d.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 0xcd23445586ccae25e770391aaa07a6e24146ebe72ceafc8c5642a86f3751bb6f. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GXBNP2436048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f598b64f78a1a3c130b86957126c54988ffed35d3b29f8931c0eea90001c2f5. 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/GXBNP2436659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f3e1a1eb03c9b87aee201ca2de38fbf9ffe39c9d91eb9c4eb6f331285c268. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBNP2443859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6ad4144743890c6a7bd94cd2477a87eeb3d3d081f773ed407138e65a60f9ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA072428364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0f2be311c0092ca00cb34c04e335afea19eb354debad627778d949cd57b951. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GXBNP2463852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc78dfb6d527e3520090dd7deb34549a2351248a8f51873f9cb332d0764ed29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GXBNP2597104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf78bb4d09a286e9cecfe8d8a38eb9debb361c66fb1621ad797e734415392f. 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/GXBNP2593950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481df4eb6bb6a4b7808ec747b97d457f69bf49d59ca9a71ed5dc9c7c819f7d3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXBNP2526643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87b213ec6763ff097a2cadb85360dbb72ea4c2f25dc854ce73d3916a746349. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX202534590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d308f0a669d1ac964f0d0ef45ea152f4f8d850114c8c2411a29126b483f4ca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282520302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e3b0ca99a66ea8bb52f9753f9f60629bea9f8dbcdbbaa6eff107efc11a57ca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX452516078.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40830139de4174997f0f6aeb502b22dfbbba89f333d6689501cc95eb2ee4d11. 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/QMBZ92574223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24440f2710b1cdd525947357b0029d2537bffbd20690f2aff76b6e1e3b3e0ba0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452577975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96216e4fe8f4c7444887b7313c2fddb66a1f43f7d79f66ee8f627b1ab1bfbf9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FRX452594719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c8de3b64681a7b5369ceb273e2f90c435d5264035b32a31e41d3fe0e9bcb7. 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/GXBNP2571186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6171d7330452f69a27fcd19db9ccfea4b55f9fa4b3b8055a65d0fbac805423. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GXBNP2577403.