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 0x67dfdca6fe691683687c4f9ab91d4f6cc20cb0c5a338909b9d4a9ea13fa2d436. 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/d14b9c7f-7419-4730-a19d-6d55d1868493.json and https://artists.proofprofile.net/proofs/artist/d14b9c7f-7419-4730-a19d-6d55d1868493.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 0xd94a1b64b2283475a8318395091ad50afc01c40a36fb70798b3f0686a6fade07. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DETO41733422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a481068efec6e0b4a236d0c5d486f1bd5d3a63883078e0376191c208e1f2ba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGWW2006865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b45257fa7f53c3eea0b38face979f74a64549a7838f4f8baab52a84c422ea. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZGWW2078492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47b634c4db5f88e1b035f99b25baca5afdf018dc560088f2b11e08f840d0e60. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QM42K1949409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3dc37d70fec7d1321cecfd7fcc614911738e0277730647eca51bcd02a7ceaa. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZKDK2024347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa75ccbc746adb4bfa35cb2a519315370304dcb8df95da721ddf2530edf4fd. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/FR26V2054547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d76126f0faf4d76d0f11de07b98597dc195613ddecacb5fb0a06b33f2d9e8d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZS652178503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd45da71aab82771160a7af73e40bca5bbc32d728344e61ec42f2b94e944d0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMHN2008979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982a9cb01173bac0c8481672171822f8cbe823f998e8990d8d83126389640d52. 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/QZMHM2046455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7060027d99790a9c5222beb986c33e4785094db29d8df8c151c7497ad33dcf3c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DETO42291805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431e90280931acf57fd85b67d2bbcbe8b923aa99a9eac845fd2d24f11693b3ac. 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/GX7852200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431e90280931acf57fd85b67d2bbcbe8b923aa99a9eac845fd2d24f11693b3ac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX7852200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96265c8c1738b8b732a68c770f16b4065d5cb1a945946d5e814fbead378f2d4c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZMHN2241988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71003b37d1b71a077f93cad5f149c02fa2cf4792b6281921ed2965303a82535. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZS642402790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7e4e348075dfdf254721afce326bb317d2f1165dd6844d07dc2510578da46. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEUD42442100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aaad9eaaa83c5a2bf74915d5315c3b51c1dd3b02611021a445a6d9b04b4e21. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEUD42446226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fac3d138af5d126ae269bfda5b628da41ac6f7e38cfe5fa934dad6774611ae. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUD42447228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd244ca9595a44967a00c9b76c4dcf5f2ef498916c15f881ed21a52be690d3e43. 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/DEUD42557832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885b19ff8dc68e6c4ef1a9620b4ea3d23b31e34c1527da1290766b410135d76. 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/DEUD42563927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa61068909daa8591f3de5c07b391a0ecaa2e848de907fa5cfe902cd16d329f. 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/DGA072524150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a052df4880f4e93fc764abb4894c6657b2cbfb4f93f4317a723f8db772d33d5. 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/DGA0L2365676.