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 0x698f01a76ba6b1a28046aee79c93d4efdae7a5a0fff27a266a8abcb2f5e0a73a. 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/99788d15-b0d3-49ec-8442-53f8c82dea4a.json and https://artists.proofprofile.net/proofs/artist/99788d15-b0d3-49ec-8442-53f8c82dea4a.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 0x292572440c36e3e3f02e2959aa738a80e00f76ae96c3a61c8f4691065e9f3dbe. 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/QZ93L2110385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44b2f32fb82603bcced806ea2fab6fc6b16ef43a3acc89f8208d632498a9134. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:24Z), 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/QM24S2102894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e302097fdc3e3b4ddf24e5b0f0e748cd53d7dddc48bf82284a6e9ecfe72bb97. 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/QZ93L2129629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f78a8786426d7da5ca50b83e6d2e2238cc39dfb056804820531d8bdf732bd7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZZOPM2115842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b7ddef39e996188483b80f91cf343b06ea732a8f455667d8fac518968e2edc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:37Z), 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/ZZOPM2117359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b95c2a7b5c155b0717a0a397e5fad76f381bc696a7ad199e07d546971bf448. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZZOPM2223577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58853e88f59c560e81b73c8445997e13b4b7e354c32d9b3202ad0fe4ede2d12f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZZOPM2228908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acabad92d21b39907211e0f62dcecdd73b931c5eb7204efd23bf5367e07928a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZQQE2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961390d38638ce577e1d499f6c764507a4b5d666ad4a826fa860f6742e6e8d74. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZVEM2313752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acc5011960b5a955ff87b644e190636e2bc76c728e6950769d0925cef25e5b9. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZVEM2335752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa324b3934589e959f9ef1a6fe1368722de6b1e477951a5400765e6c13c9314c. 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/TLVEM2467232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dad71ce1a8e7cfbd1ddffa27eb8555b41c02d416cc7d5eaa4a3dd7471ba54b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TLVEM2472749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb057143121ad715419e748e2604738b7cf769e30c8883c60d497de492b6ff3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TLVEM2472757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93178b70a4cf4d84f244602e80b225e3f1de208aee45ce0e7b5a09905d337e4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZVEM1828098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ab179442dad5cf39e592b9b15ce303b0b2beea1cfce4f4fe97c4c9891a88c5. 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/QM24S2201278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b85d365774cae2fec42727d3514e2f09e7615281df2146077c3dec9b18e097. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHR12243906.
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