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 0x7fce9e5b50d706cca1aec6a9a0b33758491d50f151a0f80c0c4de7253f702d22. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e9c3c09-8779-481a-8a19-a78df4eeb911.json and https://artists.proofprofile.net/proofs/artist/8e9c3c09-8779-481a-8a19-a78df4eeb911.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 0x3e9274b8dc894b4da7eb5fe5a65c3f18d32e5ee728285a852f60ed4a7a491a0b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAEB1970293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea20cbd3903d422cd9f34aefe0c811060b4f664eb3a17e7eb8f18ad19cd28d1d. 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/TCAEA1960643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709021f9d2c64caf13e4934073de6059f9d3037c690245dca339027ca594f82. 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/TCAEB1970350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353596604d583d4731adc5f2df6973508d6eb6ba957dc07094a4efc7d71a13bb. 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/TCAEB1927997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac43514f79a0fd88d46ec93ff793328ba29c32e3ff0c6dc752bc3875a291c8a8. 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/TCAEB1970374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c40e1d5d6b3f3ab325b8b5813a4bdc3248a4404cf9c062501ddac59ffda90b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCABY1411165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a7005c1dd12b8a78b9203f5290acf0279d455385c92da8fbe4a022673d7a7. 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/TCABY1411167.
Endurance (feat. Selah the Corner & Bumps Inf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab1ff9571f4b33a720fb9c21f52d30da2aa3079c88894c2b7c424caa95f70db. 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/TCABY1411169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557c2d29d236c14c6dfc249cb45d0c0396b7ca90c983ce96375fd5e70ffc165c. 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/TCABY1411180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0295c090abc953457b1b549d2609b58da0de0205c3eeadd58b5819f3805a94. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCABY1411183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60df88ba3ab417a60a2a45a990e7e376b51e807eddacc691f36cc6e4ca3160d5. 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/TCAAS1088834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca24370ea37a9a1661d062fc5bb604882c7d11f1a6a7a052c8536f9481d33e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/TCAAS1088857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0de2a08481f2e69f99514c1afe803c3ba2cb6faeae02f72fa999b1b9fdbf3f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCAAS1088870.