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 0x510d78caa7b35bcf8a43641899b31c2b4d57d7a371a078182809b14fec76d4ec. 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/cadd7f87-1ed8-4948-af14-699b55a26ba7.json and https://artists.proofprofile.net/proofs/artist/cadd7f87-1ed8-4948-af14-699b55a26ba7.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 0xa3477ebb33a5c9938ade4081b462ed8da2839b1609d804267d1e954bfa147a31. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM21969455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0924d08d3e150b0299280b53c95ec3062d4f070aed2b543542518b6200e3e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN1764812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8bf9a1e7d4f0d324079bc692d26d55d0d11d487c6158ea437162a02a223fc7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN1764813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d4ed8c8921e97234ea0dc9185297b8fafba282c01c63a4eec13bc1843cbee9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ1720884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed43d48c76115ed637920374c41bcb29a9b2975d7fcbdec3d3c5c1e9e8b77896. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1540709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0f11820fc31edbdff1d9517cab30978bca72c6c62544f61edb5eb807cf04f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLZJ1540721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d57d8f128f164bf120c769b87ef4848052732377dfa854bfaf6474d6a98204a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1540722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb60ed66b76366296c4bbdf8238ec9779d9446e1785483162186963ab28e2c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ1540723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb7c43a3c457572853800d6bd0091fd79e1a6a872fe0163678ef4bb0179c18f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLZJ1540839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0120a912107f3b968cd16eb1a2bb20c8ae18e5743058c664f5376bcd38b9d3c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1540841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6173817096592f0b93a1de630b8dbfcb0d514d68a8fe174057e01311b8a3fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1540842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17090bc0156c028b7ff4406f1f41952c5550dabac98ae82cc599814e820055f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1540843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe879b099d064a0b0dcadc10e32621c408045ea944868acaf1df99c09176ddf38. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH2280831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a421825ec109291451ebbad491313c227e0dde16d6590cb19a3df61de5618b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USL4R2085066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5355c699f7a3d1987aca8d84e9844652225dfca96337e853d58d5e734d0a1ace. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH2027884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ebbbdce66b0960c4941ddb6f8b012bee44cdf5857625584238c37afe84452. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS1Z1619393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0630424acb76d368b9ced9f9fa7ba696dcc718ab3509f67119818e87a728ec. 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/DEWK51900230.