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 0x303a668fe8bf1bd74c3b7b820920ea2dc85a6c6465ee2e91b55bc4f5e9f6c0d9. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/332bdb89-31dc-4dc9-8ca6-a09079fe24de.json and https://artists.proofprofile.net/proofs/artist/332bdb89-31dc-4dc9-8ca6-a09079fe24de.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 0x683a6063ce0d94ca07b2eea62030d65a4c24ddb0cea2a920a32780c28b0072b4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB52303765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0a623b76bab42b8b1d284fcdd34157708596c5ad256b1506ed646eaa468b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB52303766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f71a4227d46237c47940dab171b48faaa6bfbca05521e07c38f6dfa09de211. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB52303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d8866cc09d03af58aa548a57d9cd5bdffdf35810122ffc40d7d05284be5ab5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL2DY2300951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156bc788468851f6deca903bb6966ddb2c8f0b0126194b6a371223c53e1e522f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PL2DY2300952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f6574fc71d579a27015406cd7a7e78de74607b6afd84403425b8299ac379eb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PL2DY2300954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a009745266574afa303e3755cd5a39590d122eefea5c60ecc12c7e405046f4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PL2DY2300945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96177e80866ada7be5e7865cee48ed64a1d2e784a57c957e07dce4882d031617. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PL2DY2300946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094f3c1176ade9d152c0603b4d4431a80c652380769e3ed289be3054a29990fa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PL2DY2300947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f603bffa3131e5ee5a434240162a61dd912fa6f6316080db575637219c4655c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PLUM72200982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e77074ccf63a913eb1af5b0dd500c8ffd4b3cd309f820d916bf13ab7ab41d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PL2DY2300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79757c21f185ae6bceb11ea3f93254f0f84ee515c7d939c9a01bdd3ed70034b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/PL2DY2300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84fe92f67770e8ad691dcd2009976da2ef23f975b59787f243b393b47016a96. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/PLUM72200826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276196878c21e1d05287b4ba511e448c8c19775e0672f03d565bf9814a9df61e. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/PL2DY2300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b50e5f2d28b905055850477f27df3f39a5b9ba66972bc6df0f6b4f07c0d58. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PL2DY2300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ea9596204e889d0f70b5af4fa1465ec0f1a91ecadb65938e7495c0a33d42c7. 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/QZFZ62266131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb167b811282cde3132832cde4bbb8030e67db8b9cbb84cc863da6cf46768df17. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ42260212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fde683bda978654a75702a4d71c86426a2dc68492c11438df71af780d9a7d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWZ2181670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c722f6d7bd15e9a0424dcc2e309bf3ae02448acabc8997dbf8de467bbeddf30. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWW2157231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c17a90c1a9289edf703f82853fb5123043320017a065d935a8a448d8235408. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWU2117908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efbea9fc866ce156360e11997715f8eeb23aa99b0d1ea0cf90e35864f184029. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6F2135311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb974560f2b52ab14e9c121efe62ab92cd95c5f6f9725a16552fc464d0891f80c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6J2188416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a2c793149c68b5714920f5a8b19e0de19d2e950e2536e8f9a28959630b997b. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZK6N2125094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5af7a324d264238fe97faca47d192f6e66f95979439d5fe22f90b21ddeb6c8. 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/QZHNC2168687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d61d87d131a0e2529ff1195893af46b6ae6125006636d6c7a71fc6362bf3857. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN82188606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e6a6c59e81cc2eabe180349a4375f8db61faa934e452b737f7bbc713e07dc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN72123174.