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 0x56c48e587ffac5f35138dea994dfaa9a8fa97b9c3494a50cad743f457806a222. 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/8ca1ca8c-8075-4145-bfb2-c3e1b2b14c27.json and https://artists.proofprofile.net/proofs/artist/8ca1ca8c-8075-4145-bfb2-c3e1b2b14c27.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 0x4b035e3d937c735a4a403ea8d24b26d2903049c5734156aabf01684f18d365bc. 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/TCAHN2316973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b8dd99dd2fe93550c58e69e8569dfe29c4a4f1fc4cdcce9307550da1bb3d3. 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/SGB502549908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc44defb7e9d74e3bf421004fab8580dfbd7f8ae803132471755d829e3555b4c. 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/TCAIT2401639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fde7e9f25eebaf7ce32ae0866f2185bec8d6af56c633930315b65f43bbeebd. 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/SGB502535848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b8dd99dd2fe93550c58e69e8569dfe29c4a4f1fc4cdcce9307550da1bb3d3. 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/SGB502549908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e94e02a46d720fb32e47e11797d4eb62938328554e86e234a3022a0daa7ba1. 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/SGB502549416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7732595c8ea4fd4ada9f6a4a4f5c9d61bc9fd1b7ae6ca55127d14f24647069e9. 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/SGB502557358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb511700a50bd75b96ebd5fa36bed65ff8453ce4f01b0a660ee31927fd323fb. 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/SGB502530707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e7f5e0b17dea39a89a191342e73f871599d2ab378b32898ce82cf23fa02e5. 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/SGB502598784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26812b3a87e222939d46c0c57edf35c88549d019d42ed9a917ab8f26f96b80. 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/SGB502576934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e41ffc58605924fb05348f43c38cd5e7106622eed61d91ff941ec09c9a8d7. 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/SGB502578131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda284bebb8f4a0e2384a43dcf429bc6e618ad491dd6928c1d60243490491af. 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/SGB502551628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f89148584a283d470202224e7a1bcfb9c11d1b5d7721b3e48a147e1b68cde. 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/SGB502542079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f5f611369feee9c3792153d9af2b566b69420416316b7990aed670232527e5. 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/SGB502587654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94ed0bc94a742f8a02fa46f4313ca9fc87bd427810394bb7a534751affcd53. 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/SGB502594425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9441af15a5d519a5ce0a70567dffea8ed993a79871dafbfb919ffef2bd7628. 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/SGB502512384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24391e93fbd4a94304e1b18bbad21445e7df51753d15d777fd4049575273ac5b. 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/SGB502569588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1ed38fe307e660af6065ac996abb71135480346fa0c8f66a18bd5a1eafd00. 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/SGB502544637.