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 0xba55489112267342b12af6cc5d58508c08fccde2ae011e40a55439e045617944. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb71c1c3-d7e1-43db-a3c7-c4680e73e331.json and https://artists.proofprofile.net/proofs/artist/bb71c1c3-d7e1-43db-a3c7-c4680e73e331.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 0xaa44abd3d29520441b6a6d998685b950d00662a20294fcf97c214b3aa9ef5895. 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/BEB682400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c8100fffedd3289fc4817ab4e0cc071570a56ef3801b5275915ed13d8c689. 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/BEB682300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28813f5622c8f63474ce4289a384b1c3c4331e2c8bf423985833154ec5c260f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEB682400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a87c170b8c9a3b734eac1ab64ad253cbb2fcf649523cf7f27900cbd6de90bd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEB682400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afa0c3e0636f7c4aab95d96ded983465b3bf47d65f1e377242966bc3b8ccacc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEB682400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b7a0e573d789a426c9a2cde688ae285a0d5db61cd0a593ff69baa3a246842e. 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/BEB682400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7541238bd7791b9166fe192ab6de845166e439b70e55f4e79a654ec5bc56ac55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEB682400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa44abd3d29520441b6a6d998685b950d00662a20294fcf97c214b3aa9ef5895. 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/BEB682400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6746eb8b1007ede5fa4d6d790a74acb1f10d7b84a393507b2e6738a8290ce9a. 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/GXBNP2428588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ecc484dec3dac13b999af29d5f7f05fcce578515578b10faed2b660e50388. 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/GXBNP2428589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc486a7d1ec9e48eb5c2ec11745353fa3047614e36176a6875d8f5fe81ff85. 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/GBKQU2482769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5d789badf597106a1e0ed675c3afe3255acfab0771e939e381e45bd68ebec4. 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/BEB682200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf428a1cf81a758f01c571607485f68a14f822fd7755de5688b732abb56280839. 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/USHM82189844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140aa821e9ec3fad813529ca44ec17a8a225503c1bdd8a72822481f4900f30c0. 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/USY282015352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5b5e34432627a55b5c7d7aca0e7951981a3f418d3ac18c3866e990ab6e0618. 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/USL4Q2022543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0029e8199f12c9be4c792c1c938b8b40e10bbf602284a797b39fa4092cf20d. 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/GXBNP2427298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc486a7d1ec9e48eb5c2ec11745353fa3047614e36176a6875d8f5fe81ff85. 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/GBKQU2482769.