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 0x07cc363765a4941607d92b2d8bf3e0c3e5488b482cf65d84e9e7b811dd79b244. 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/8cd34d36-5896-47f3-9a40-4979b738c26f.json and https://artists.proofprofile.net/proofs/artist/8cd34d36-5896-47f3-9a40-4979b738c26f.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 0xdaf05e99ecea959cf8218ec1145fe48b57242fe078c3152aafe0c91bdf0ed5ee. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZ5WQ1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91b49147bc8c7cbfef9ea594bd4035ce70a803a00cf5725953af539861541c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5WQ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb947bf5709d6316dd486cec1eafc153f7c58d54300329c3f411564cf95e2e460. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZ5WQ1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d94cee0ca24081b951094375b871847a6982b6aa0f25e7fe4b2a7b1e35dc2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:49Z), 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/QZ5WQ1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa61bb5b65ae572985c8237e90c75258e07a6d6ef7efedf27a3e85b93a29f6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5WQ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568671be3d4448809ffef98d0b33dafa4ba5e2a88d460db62eb1be6815b8a9bb. 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/QZ5WQ1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a9cff9435cd06fb23a24c5608788ba90aa11109dcbd3d5f09eb70ede72094. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZ5WQ1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6906ceaac5987e9e6daad64cb408f9b2404e7935062cabfea9d548a346e2f918. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5WQ1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3e15a0aa7ea12d03300e2e3721fd5617f386027dba083c24e9d0ca7af67f6e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:41:08Z), 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/QZ5WQ1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca61abc2e89a2ff44a96379f749034acd7e8380a22dc2a39bf0f04492cbe032. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:12:33Z), 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/QZ5WQ1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e89e674beedc698ad99af7b4bf66c7fa39c8938c49e4f6c57c67bd0e75f4bc4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ5WQ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4567feeb6aee4a225e5ba1e19026958bade448bb763c0c3d7f208d89fa5266. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:39Z), 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/QZ5WQ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb498baa990767e539edd29bd185608c08968ccf342d9f2e36d09de84869f6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZ5WQ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151e34fae73e464a915874961904e99a25fdf6d406a5419e6dd36a3f5e14ddc4. 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/QZ5WQ2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f08eca40b9ca2a2d952e3a97711eea53ed24f3fc8fae680016d9d4533056d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZ5WQ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf533ba0e44f53b7de341ea9975199adbc797f0243254dcbf77c2b0aa8787908b. 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/USDY42561074.