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 0x9b62cb909af174703039d7217ad9c2cc25f7216c4586f19be6ee83bb07e10619. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4da09f30-1c6b-44bc-9813-ec24e372018f.json and https://artists.proofprofile.net/proofs/artist/4da09f30-1c6b-44bc-9813-ec24e372018f.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 0xfb11ff338152c8d7a67b1172fb8d32caff0cd8130c4f7670cbc5b95ae8c47e18. 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/QZNWT2148658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322c013cf2824eca86d9f053bb60da223074e1e8da391588d9af89f3dcc06d2e. 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/QMBZ92151909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55abc20826fb9ba31f07400842a17f115951712d83fbf07d9f74bbdeb8e2f6a. 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/QZK6K2007196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b382363e42c4473d8527d6a4566307c0d992d6e9a477326f9ae4fee2245f8e. 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/QZFZ22192809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1aaf2cebf7814a4046e9cec2ff96ef16414e157daaec36021c0da3eabdf12b. 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/QZFZ32107761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939beaeed086988c3f7384154aa158420cb08e167d6b2685a279be9fe7023e63. 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/QZFZ32105974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5772e031aa3cf3d678b664365a66fcda52f299aa344df4ae9737912605c679c7. 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/QZFZ72132530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e337950bdf3899a7924abaca00d7dd0cf9de6317717f66415fe668c621638. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA42191171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83385b86f09ce2bc2bc5ace1c999df21998353b7cb5fb016d541b8aa28188bf1. 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/QZDA62104178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9a24524e0218a0f60b730b72926af7eaf09f8b9f1f6bdbe1f507250cb7f75. 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/QZDA62152071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9441d0987023cdc834e39808eb4cc564ff366820b7d22ae7f6db190dc6611e00. 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/QZDA82121846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301caf24ec8ffdea69868475c5d98edd4cfb8fc82ea0d87ad08a0f1af44e04c9. 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/QZDA82136481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246a9e8bb54c0df73bba3f01b72f48643128e677c959793d2a78a3ea175787c. 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/QZES62156886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d92765febcefbef7cb5323011a568d2547e845afb6b69aff1941f181366bea. 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/QZES82199252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e9ea07f9b80290270e63ae023b9eedb0ff35db2419d4e7e22454cb3581bfd. 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/QZHN42185752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6ed0aa535c35e9262135732bfb67228236463f39fa4935badc961077a5e8f. 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/QZNWR2403027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf4970a19ac40499405c6d454ab9d188596777ea481919636918b2128fbd68. 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/QZK6F2435129.