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 0xa44e7967095bbd71b6e790f2b2e9eda63ed7603d8eabd2d1ea7b1f9e488060d6. 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/052132d6-56c3-411c-9370-45818bca72c2.json and https://artists.proofprofile.net/proofs/artist/052132d6-56c3-411c-9370-45818bca72c2.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 0x919c11085179ff4662a192544fbcad80923fb6996b106400d336cce52f94e5f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLL531300773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14208ab4eadd71cdd465741b2940846730f8999752e4da07692f97da8cf7f8a0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLL531300774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15fd7d8e63756cca7880316d610d83be087bf9b118dedb3633fed668854070. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLL531200722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb692a6965395d4ac9e0b37b59690164e8a3ceab7f80373758354fe5a418ba624. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLL531600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568aeebca14b98891dbe9a2fa02b16d1422eeeb9dcc29d9b3c131007602542f8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLL531653001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b7b14c3c5f394866492022eb79183ab473dcd32b510a39bc869a736647bfc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:40Z), 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/NLL531653003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ade23706918a51e3d8ac8b50f1e82f70d127de4775e9517638829b1f1fc74a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLL531653004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf2d289a771ca5d4ca3f8babc3bf9d4e738d8ab825f91c51a06bf4cf7d19532. 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/NLL531653101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464326c5e935274fd644e80dff2de4beddb1523cc7413f4d9cb7bba94ca56ec7. 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/NLL531653105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8415486f1c0f7b35335b495291a3d181e8a443c0c88e8941fe5b54da4ba86. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLL531653107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fd05abc0b7b3db7c2ba7d48dd8222a3a198d3f94e959fe431585e1655a60e2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHY2492474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282063802a7a8d032af12d251be37cab47be7297b50e2937315f2ab853974840. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL5J62500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282063802a7a8d032af12d251be37cab47be7297b50e2937315f2ab853974840. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:26:08Z), 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/NL5J62500001.