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 0x6dde4e72c3ee32db7e79be79cba2c3043fb720056c9108856526286b7e55306d. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/268e1b79-e8f5-4a9f-89a2-329cd2b94b13.json and https://artists.proofprofile.net/proofs/artist/268e1b79-e8f5-4a9f-89a2-329cd2b94b13.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 0xc1cef04c6a02949986707741836488fb0029ed372fa21b1345646dde6eedc5a0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBMJG2334615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf941c2150be0934b3acf778bbd7389ba992b9b614b41a46a5eb5ca9d3a2fe2. 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/GBMJG2334617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ba36fc7fb49d04a828b8200424f0cd91f47dfc8b4cd09234d4151e01c2d9b. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBMJG2227368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b2eda53534413fae72a830344e25ee2901b8dce8f5a5f99111c3c459a94aec. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBMJG2227369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed3601dd9c5e58604f68bf3d078d445a86c7f01305d6ea2994d6f59e2d9ba93. 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/GBMJG2227372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c89d70afbc25ed87860b06c3e3e38ac2476216b4d0949ab1a5cf44cc97ea6d. 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/GBMJG2113857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10e3fb2630f80037969777d158c8a334646216067b4611b89220dda138ef7e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBMJG2113858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da259019ff063ff6b6d53b647a4fbae4066cf8034eef0478e303cca6e85110. 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/GBMJG2113859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e78405533cb60678e409b70408c79412fed77a2a3cf687a00145d0b78642bf. 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/GBMJG2113860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e154d38a99eacf049fbccaafd44b2d31e9b361a69ed4c6561678a07ea6b1d0. 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/GBMJG2113862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dcbad60e96ad5f3c77819993b6e62226a14f8ad4c8fafe9e4fb8bc619c8635. 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/GBMJG2113864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e29f83f0c7d2f656611b2a83e7af703c041e7e6454036dc38c1886653767144. 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/GBMJG2113866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec4d04fb5ea836b1bc67e86914d25d6ba31ceb9b6275b0d3733e174119d1e7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBMJG2113869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17dc90c9571c193495cb86c162b7fc745a23e58f7b98e7b715e4a4c17797feb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBMJG2113870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90acf5f1d2945cbe2030aece5bf24a3e5538ce65289d0cfb2840447dd4bd9f. 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/GBMJG1911922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5364fc58031e73f8df8f722744b82613f505b930b22dd36c3e26d6aae0a912e. 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/GBMJG1911924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff035a46616caa9b09df6adb932bf017b52de9b3b7bb494a0555c31bcf57ccb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBMJG1911934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e370bf47543714e28bf6ae772596b7be57da55af8269a9fbe08d88fd47f22d7. 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/GBMJG1911935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d3bef77af878df18417bc23914022b3351efabe14a900e3a5118f50e0d7b66. 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/GBMJG1911936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65634c651be2b236e4fa9bd70ef0ed0dd4fb0457aa2373a0f1aa8580f125d86. 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/QM22L2002657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a2d880347ab6c28247b267cef56533f63227841e30a5610f471336c9a4911b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM22L2002662.