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 0xc46a2157c62cbf2e9c44e3136ebec41da99f815e6720a2fb07620ba330d84e55. 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/8e0637b5-9a64-466c-8397-c90d66bf8f07.json and https://artists.proofprofile.net/proofs/artist/8e0637b5-9a64-466c-8397-c90d66bf8f07.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 0xae52da9c45359360c12f3a4132897426311143657638e4cec3b5df3e7717844d. 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/QZPEW2480670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c8682e79dad1d48a522b8600fd602b7f6f980c6783e4874c5adac9e9b40859. 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/QZPEW2448645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d16ee105db620f98a5fcbfa945ab2b006d7be1b037b6374181a960840beba7. 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/QZNWS2325903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603da34e1e47ecea3fa2a2808aae34e05d18281aaca1f3ed76235e553f95cece. 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/QZKDK2368730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fabb27dcaebf7ea20dbf282f5a4a74d4122f07b2b81bbe9a12c10cca9189b7. 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/QZKDK2375672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019195d5fab107f03f26af4c375bb4825b4f6cad362f2f926aa865af88d0315b. 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/QZH5E2248169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b9a61aee31955530eecace08e32ff4ab494f80e1235348bf4a40cefc635ce9. 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/QZNWZ2125946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664cd65c5721ed4fd9bb2ee8b324b2d1d761abc5bfa058b18456a420e9c23e14. 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/QZHPJ2109415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8b4b7626ef8bc55e4aed99b5ff1dc92ee833bef759b1c548068084ee0407d. 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/QZHPJ2109416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064f5c6372bfe6051851e871b26fe03434ae310b409d39859e34f72528e4039f. 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/QZHPJ2109418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a2ab48e42f6c635483ec2e8c009050da841240965256504b87f11ed2b6b14a. 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/QZF8N2124398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca91fe1d00177743e4ebda51fbf82d1063576279c284df8721397d290a7854. 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/QZHPJ2109423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d722500890377829a975c8a6f85c2272b265720645a5b298526dff4be40b0. 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/QZHPJ2109427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a2ab48e42f6c635483ec2e8c009050da841240965256504b87f11ed2b6b14a. 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/QZF8N2124398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afba145553e7669b0d1412c1a76440c34258ca95a02d5aae61f6acb1656303a. 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/QZMHK2009271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7758bcb080400ea10c71d5e1323fb635e9a818a2de4fa7d7cb6c9ce0bba9c6ce. 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/QZMHK2078849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd85d2e7b84730bca60293d36dfe471e7aafb08c694d97dab63b309ef9dc152. 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/QZJRB2046848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dbbba7f7421f0f2d3af8451084019968a179d44e764a410d45eeacced3a5cc. 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/QM42K2153539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e4235a22e7036dbbd76c744cd17c3bd1544dbb9099aa23d5ffb3ba69c475c3. 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/QZKDK2025522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4147b0ca2035f393d7743b925b659b1f6176ce30dc1a003acbb08d8071853d40. 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/QM42K2088536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79bb6fa6e2ae0dc71ae6e1d04897ae7338c9257cebb246297dda6cf356ebd86. 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/QZKDK2004574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db315e8c0984c07332c3d42a8aaa0c6576f23f9ced762754a56926d5ff48a4e. 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/QZKDK2022798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f416f51e542cf1bbec0f9f92c4170cf5ab80e29048d792de5433af6d39dc23. 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/QZKDK2047915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec20cce0f5a485ee3218a7522156fb94f3d0c33339875070c017344fbabb17. 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/QZKDK2087627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c7c0b04b00e1b99a6dc822558e959378c96200783b3abe4b16cecbde0b9387. 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/QZKDK2015812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31090a2a5c3ec4462c9f5cb51a1b57ee3b976f1ee21f0ff000d31a5206da6a8. 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/QZES52288406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f2222614409cd31e68e318f35b799ccaf4ccc0dba07ef3f89ccf2102a36e11. 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/QZKDK2081677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8239101c31092366911a8aafb2a814ac66026edbcb4eacfa7971711e80b159. 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/QZK6H2096828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e2290c8b1243a5e94addffc09d3804dddaa4cce61d3346c951cd40b485e18. 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/US38Y2308796.