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 0x9861417e83d90852c57da0f78225f1cae6d04e567de0388e5c86248a9fa443ad. 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/faf7a410-d99e-4238-a99b-f569b50dc0c6.json and https://artists.proofprofile.net/proofs/artist/faf7a410-d99e-4238-a99b-f569b50dc0c6.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 0x1547166eb2374d5ed6dfaf1bc598fc19df08d3ae99318db04938add6fe5a8c9a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6P2404277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0eeff8b8238c79647b406e1ea8024b3179481779d4b8bae588533b11d5056a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZK6M2410379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4b56b21da0e2bc361502745ab3a2848740318554c025102dfc2db780ff2d9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWQ2463355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862379d651c5150367981cb8b8a41b39a70c44bbe770c10057263f186b83e131. 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/QZNWY2443132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38077ab6c551c2d8d51bf4725e231676c560ebfbba3906d9b5157353f9214401. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAU2431630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f039dcd71ab7db3ab7917423b1c4c3460be3ecd470b7e8635358033001a793a. 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/QZKDT2400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb318e5aaa2351269bff50699b571cc6c7823910ff761fa212ec53c44173fba. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZKDT2400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d787a180b707b742be42d3b729eae08f68254af312c51aa45f6e215fdb3606e. 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/QZKDT2400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d3e7d531196809080d50b5834ada3a979c1525cc6ae409787ec36cdfb9825. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZKDT2400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d04e5df384c3742021054235e32aa87bdd88834295858506cb77f7ed15ebed. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZKDT2400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6328b4421e9d63fe9d6acd11e38710c501dab34296be3d2e19bdf9633b655c9b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZS7J2535950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae7c7a02c519329f6b61acf3d042182d542349b4733f890ce4d104ca12aaa01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTLA2522725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dceef48df8477ece07e25bf7775474736df47f28013b4a019e85d862bd80351. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWDW2586277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f64e0cfc2bb1a20c1e642b0e8347fd5add544cf0729f8b515739ca20ee1afa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJZ2558281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03979c11a6ef80d9a44b69c80021ab4ae1a1773b9b993f1bae3588a74b8774bb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZS7J2524476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bee17d03d5431e502739df2161d2b0ef331dd7d1b7aedf2312605a46be8302. 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/QZS7J2579879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba154b695b539ccc764ee3b4c27decb66187d334d3c996fa3d55b1d09bc9910d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZS7J2525764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db9dfb5911de19e643085d5d8c6b22fe24f16352a8e17d1b1d6261405a2ccad. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZS7J2532753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e72ec9a851932d118bc7afa6996cb4a91ef10772766afbb71dde72dfe7ea9. 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/QZS7J2573203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dda1c51fde8af7afda14abc680623e3c00405844712befe014cdabb31357a6. 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/QZS7J2420937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a0ea52fd216b91504cc631f92f7129e31b93bca694831d52035a8356e9cda6. 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/QT3F32449293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dda1c51fde8af7afda14abc680623e3c00405844712befe014cdabb31357a6. 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/QZS7J2420937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e4937f1f844aaedaee55f4b65a38df65481df163b3292da5644647b735faef. 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/QZGLM2507717.