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 0xefce1129f6b58cdd0178a0f1f39dffdbca16e9d5d30d316c8019d8148a2e64dd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4882c83e-39dd-4a87-bde8-410130b20cdd.json and https://artists.proofprofile.net/proofs/artist/4882c83e-39dd-4a87-bde8-410130b20cdd.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 0xf8bd220b46784b29f4be0ae904475d0845baac7f1e7edbbeb45ff21244395912. 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/DGA052035312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7bc71392562da77d29aed90ef8565e8f68acd3306f7b97f6520d3320ac3dd7. 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/DGA052035313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2b6bcef955a24c4c0ef582fbbba4392234293a87e0d80ce694471dfa18c578. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NLCK42401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada473f3cf559d2b9b4a0a8acd9f36136c4c0a9f249088e8f3b4f18046ecf5a. 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/NLCK42401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfebeb9b30e5df6f8b5a1c834faf12e73485838f56bbb75723b416f907709f8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:37Z), 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/UKN6K2300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceccb4d9ff06a670fdcdd03315dca8f9ec079ac574c32f1864717ed5d336f9a. 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/CH6542246501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbf2a3a5b0824ec4ea0815bc3b83d161438337ad4d2dfa0f713b1e78bf0e8d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH6542246502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed47fbd21772e949192f1baf975b9c8b3969c42bc3fe51edf548178e4501f9. 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/FR59R2262723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04261c86ac8e69a428ba5e6f592c54a497d997f8064826cf222b5a2c3e94bdc0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202120742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf26023a8447f270f97e4e1e3d3406677c87e205c3b9147dda188c183e4d32e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX202120743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0cee4c2f88073a28aa8ecc4d8b21f82a441b29ddecc5f187dacbcdcd4afe36. 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/GBKQU2065213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194bf669a44c3434fb3e67ade74c487116f3159f97c84476d4c6844533bd6dbc. 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/NLCK42210353.
What's Poppin - Narciss' Champagne Poppin Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7a79e6f87d3ccacf87a113809cc03b7384241d0b43fa0f429281f7b86ca7d. 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/NLCK42210354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa36512ea84fc03824b514c26cca9bbc889b17e2911a3bc2384c48a2db97e5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLCK42210358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ef118ee406f525336156581a3b16b86f054b85862a7b1b9c19b2c0d5abe20. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZKDK2103862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6573fad1447fd9875b0d7ab927ff666e6497e9bd0f7fe3cafb74e3e20ef0ac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2259561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390fc2ae24528a2c53d5162cd624fbdd9d0a5d989e87352739876ebee686c7e6. 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/QZNWR2259565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e09c6e05de797918e96852228eaca5bf15ccb6da54b414f9846d37495d292e. 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/QZKDK2382052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe5f7a74aec99fb36e842b5d59e72c803b9eab8e1a071a258fe6d4a76fa8fab. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:05Z), 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/QZKDK2382098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039adad2b73bd10d6a00a07f0016494cc3979ec8eb0f2f4a2333a004444f8ff1. 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/QZMHP2050195.