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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db5fcee79dece3c261a8f2a430592548f3d14515ef9396d4080b4930f300f75. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2446dd8-37cc-43df-b01f-392ec23863f5.json and https://artists.proofprofile.net/proofs/artist/c2446dd8-37cc-43df-b01f-392ec23863f5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9f6b41ab1516fc8a99c5f5c8de0fd879aa36deb6fbca6e47feac771f5b4676. 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/QZ5AB1862715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc730956cbc297904acece64046918a7338f3fa9cc74f61a83d0b67fd5550d6. 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/QZ5AB1791652.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc23e45a0594dd80c907a60bf7cc9e1c86bd5cc7f54eeccb86042d9c832ba71. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1862721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd20dc00ec2f8d8148a1b5d2f3a851800c780ec2a34c2f41d807938bb661b390. 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/QZ5AB1862724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12abe777ee81e16e3cc0833b27b99c05605047c8b17ce5de207d3b56efbda175. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1862729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93af4bd51e5aa3880c1c7c5a6ffa3e739b3c5a549bb34a4fb0634ab14e2147. 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/QZ5AB1862732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483cf940567993b81c83f303d163ae202bce7e730ff1b39501abccefffa7dfaf. 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/QZGLS2103842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a481159bc2f190d7c431e15d10718bbea272e8a27f3f26c4b9cb8dec2995b4. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QZGLS2103834.
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 0x839eb74bcc26c899f43a0565a6e457c1a74618c747af16845813e9a8a34dd60f. 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/QZGLS2103844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d560bd63f9b6a0d1807f5e16073b1ab69481af81d490cfd197f07884981d4cb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZGLS2103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc00c0e33bbef3da2cd58635cb6d1a0e7a5f21bda9e71c04eac7be001f681f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZGLS2103841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6b928a0231ed3c3243096a0f82de8403d92fdad054a4395e63574524dc7c16. 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/US7VG2214470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5493991de033a74678a65f6c85df6dead9496f473cb13611be31f0c00a1b3108. 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/US7VG2214469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959ba8f9bf17a46e628bf873bc7cf7fb75201986617897940e2b1c25b28cb245. 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/US7VG2214473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a07134b072ad510c4a4bbeabb4b2220dcf1d48c8a75bac5b66f444a5e284d. 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/US7VG2214474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75623389919f1cd3d7fbde99495780da369913feb452a3539751ae4587570eae. 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/US7VG2214475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafee10e489141a0c2e2da17e9c6dde6633ed52b5f5a8d9ac570a15a5ff40b6f. 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/US7VG2214476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226244199085de7f8049376bf05576bb68050d45f812ef39b222839083dcca8d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US7VG2214472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce19c1283a9daca638b6fa962aca180cad4c17350e65b585e612ec5887001d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US7VG2214477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88dd5001fab0e201600313f510188ec264342dd87d3a42327f89772839de3b7. 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/QZ5AB2136818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a8d09bf90cbfe5633ff6a404b4d2e6209e5ae7377a27fe204b88443092916. 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/QZ5AB2136813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eff43d3b77ee4cabd5a4746f366f6b648e78458237ffb5115850b7e5363585. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB2136814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fa5ec90d300c4197e34458474791fdecc3dddf8532d457d50d1e32571ab7c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ5AB2136815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dab5a66a065cdd4818013bdea94581a43c1c8a83b386fe595df25f856c25b40. 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/QZ5AB2136816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71cf90568f01d42c077b4b4b0167685ac32dacf68c5c17589b891507643e2cc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZ5AB2136817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bc9ed4f879aaa8309db598d97d4c9faaec4536cc87005cfd439327e6937d5c. 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/QZGLS2103925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd89d8ceb027a338a5438fb6cb06203555137f302bcd4d5b7206084ffc0ff7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2103923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c6b507a4e8c0d389578d9aa2555ca69d5ca102fb1cd566d196f827baeb40a3. 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/QZGLS2103920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0dde1724f4276e548e8ef77ce5235fe9a8327e20f4c6854172da4be4e0e6b7. 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/QZGLS2103917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d19f0aa201af3ae66e40c74e029c08bc6aa4d21687c8dfd06fb747cb2618d. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZGLS2103919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79543a876713b17d568559111ccd18ef7050620984dec2be7c475ba425fa82. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZGLS2103916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed5e2fdf3bbf948217041f1a15c6096b4b505cfa58fbd7f5bcdb485dfa59cec. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZGLS2103918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee7ea214ceac1def368125e1ef2de09a56e2a5d2af6cdf6e2f2bbfafb6a29bb. 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/US7VG1691263.