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 0xca9ac9d00709e377b6fd0d20b47098e2a05c6cabe9a6037e9cba1b73a0d11434. 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/26d4fa07-dfad-4edf-bd0a-495c05912ed1.json and https://artists.proofprofile.net/proofs/artist/26d4fa07-dfad-4edf-bd0a-495c05912ed1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x7d4f2f370e617fc14e5bfe237fd23c1e4624dcb7c59081376b226482852994ed. 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/USKYW1228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f2f370e617fc14e5bfe237fd23c1e4624dcb7c59081376b226482852994ed. 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/USKYW1228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94425be2a6330c27ecea6e7ff27aa1cf87795698c8e168c2fad9040bd66fdc73. 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/USKYW1331969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d2efe1547d32f24550bf276ba28e878c3a374643c0acd2bbbf025bf7b67843. 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/USKYW1331970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2257bbb0775ce929209f1a776b8e785608134d6fd6939dd0e86368a21be5e6b. 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/USKYW1331973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a869f52a78ad2c0af20a9ec7bafaa7f765613755094907c0e2dd7b2f8ac235. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USKYW1331964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8da61f60466603e1cda5b9c0fbdb379308199ee76a3e4342b325c70dc2c88d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USKYW1331972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364b4f81ba2190c0e4f8bc8efb6b5794222f47a4ec06e82d68cbdab5248efd6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USKYW1331978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1737dee8821ad090044e4b0871a433a528e845f78068140eb73aa4517aef828b. 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/GBRKQ2238533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be63fe2fd24bbe6856087d41c5733ef2b0b09022b2a09c30d48482991fb421. 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/GBRKQ2238535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ead56b3cd7c901bf843d7fe075c6e5e32f6244517ef82033f82382f1de47c. 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/GBRKQ2238537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6d755c308e3d213bcb7b7137e75da55bc3fa2395b8acfd4e80b0762ecc408. 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/GBRKQ2238538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9be2da1dc1d71137f92751863b9a7e81f7f47e4dee7986e373c472f448cf4a. 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/GBRKQ2238541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256abb261601ad4209d65a4cc1159c6637fe8dffdbf1146815c76718cc91d870. 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/GBRKQ2238543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f51dc551f760a8707dacc1b10a41ec1dfff1dfe06a6486f77ce3c74b91b9c5. 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/GBRKQ2238547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a1b170efcf08d3a67f5161d84d33cd70609e6e1f8fd3249af621f2e9655c4. 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/GBRKQ2238550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63502a6cf5d4db8eb9df6541817543fe6bf1f4f4a1cfb3b1090009b9ff2c1b14. 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/GBRKQ2238553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc5aef1a6bb840e0e96088c43c5813e833bd27a0e1c8cfe3fde1ef98908246. 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/GBRKQ2238558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92548a45b418479d0b24bb0582d77003cfd068b4dc1f2ebae7e753183bdc2cca. 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/GBRKQ2238560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39add44fac66457108429b786ffba772e0f088d67a4bec6d30cc54b2c99c2024. 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/GBRKQ2238562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61dcdc98eb60f0044c01a2e10301a3168c360362a03b136a736e6a170b74075. 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/GBRKQ2238563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c3e1bfe6988afa2c297e6fe98690620eb7841e92e25813a1349d248fec413. 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/GBRKQ2238564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e402064de367a33b19110a68dccdbc8f22f70222705bf437ef032328ac0a2a6. 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/GBRKQ2238565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c8f1b3f5c16367eeea5ffe140af9ca399a30e416a1d9169ce77e548a0adde7. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBRKQ2238561.