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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9b0e38aaa275d665b9226251377498b668a8813afda13c40f07288721e3d6. 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/f439fde7-c11a-4621-b8b2-71c9ecff790b.json and https://artists.proofprofile.net/proofs/artist/f439fde7-c11a-4621-b8b2-71c9ecff790b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0dff919016796ba236d63e35644a707700410a2527ca59f4742e7707d78387. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6J2163962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb113ed0d691cd38de614bc834e1de9fd8fcf524d89e363b4c5b8a9f68972b1fd. 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/QZK6J2163963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07b432e606d4b1f521d1c0a376d0728a66ecb1df9b98d07b0b5ea8e4814b9f. 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/QZK6J2163964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62ce9e89866f5f8810b8cdd5c1d1c199956efc010c7d914483e0f6ece3d597. 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/QZK6J2163965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c0c2c48f4a9d027bee4ea209b3421284cb39468fd688fd256365f21ee14b1. 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/QZK6J2163967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92be57951b12fd7de48d1194bad0837824683552abc5adedbad11a895860069. 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/QZK6J2163968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c47faf6f681350412ad42fdb254d3424ad152cf46282430559f82aa6a93da. 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/QZK6J2073408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61f79514579c9561984112012e3b3590713795728d35185ece68e63b88756a4. 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/QZHNC2044867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeb80f77fd5edeb3f0af6466a3e3617a7f4abc074420514ec084e4c169470e1. 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/USUYG1566838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372df969472e1b66403de84fb95d02ed1972ad7de5d637281e82d94aef2c24a8. 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/USUYG1542986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c360cac72bf90558f488c698655e4617b90b14df07b67422136a88e2ee77d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1532468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e22b882aedc430493c50326edbecaf8bb952040a54e1b82dd2f2f1ca837223. 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/USUYG1506641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617637d9b37f5ef122acf29bdb41126811255efcb4dc6a19039b110b74c8a7a6. 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/USUYG1500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0217d584e49e7945855c567c3e93a7b4e437393cb54657c84df6f22d77a086c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1469750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe4618b36ae971dc200cc1d51e2aeea8a1cae99078a064d69b00b6d00d393a. 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/USUYG1439405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98e8976e2618bb75283571ec8c34c13ee777ef45d8f8ca67cdca43a8883094c. 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/USUYG1411656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9a81596440adc2cc28874c353b16e714879c618b07b94ecd8ce9e56830804. 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/QZNWW2118761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67c47faf6f681350412ad42fdb254d3424ad152cf46282430559f82aa6a93da. 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/QZK6J2073408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61f79514579c9561984112012e3b3590713795728d35185ece68e63b88756a4. 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/QZHNC2044867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a938d8415e3567bef2e165754c781ceb4f382f39e30bb800f7dea9339f0d1b. 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/TCAEJ1960167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64552d389e5d52dfde1c1511dfa87ab3736963158dc0e7828c187c35e150e014. 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/TCAEL1912891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25cf8e861349d401866416f967883449f3c6e442f16e037c7063be78448812b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEL1912894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe979149826c60255c7be07535f140cf7d7827c2b3cb2c036f39b7358c7438d23. 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/TCAEL1912900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec557ec715e90be9ff30038e4eee1b0a7a25b924c72e5da38a9d5736d6ad4e37. 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/TCAEL1912908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6800485baacc23dae8b727547684862202d8a1952c7321a7e4823bcfd1415. 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/QZ8LD1948458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2cc7658bb038e1270befe41a71584d7ea6e44a2726ce802c825302e9a3fb6. 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/QZ8LD1948459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a72ac08db721067bba1d5189d59c10edeb0a172ae33c2abd2ab5716eb8dc8b. 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/QZ8LD1948460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f063a93118a43eadf6feed813e1ad117c1d3229b811f3a2d5f40495b4c7a4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZ8LD1948461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77405913d6ea66a885a12abb1279f85643e90767ea2dd9e8fe05cd8eef0b623b. 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/QZ8LD1948462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229a7fc40ee9afb4f4ce496e817e9cbacbe4ace5e759c3d9ca073c21751b8881. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ8LD1948463.