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 0xef0563575f2fc0025fe18bf8025b8b2667873dd7d1c654e3963401f6645b3342. 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/b90c282f-c31d-4e2d-85a5-954eab3af255.json and https://artists.proofprofile.net/proofs/artist/b90c282f-c31d-4e2d-85a5-954eab3af255.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 0xbfa59648cfe5bc2b9330b9410dba0014db218ada350105f5199736aa102599d0. 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/QM3DF2276238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769c0a1b93df508d94025698b5623137051cbaac3370d8c14593d91a0929769e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM3DF2287391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee2a9e50e8849f662779da0ab7b0b1c3e5c9af11fc7a7b311f37a5e8b5928dd. 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/QM3DF2294278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c601a9b3e32087ba7aa0a1a96f6350fb70a766a77d372d9b5aace9d11ea2e7. 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/QM3DF2294279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f9ccf7305ce560d676f59347cf059eae3129cddb766ddf2d8630d821f0e1d. 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/QM3DF2294280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97af7800a91be5069b25b8bcf9516734a2110135c70e155aa214fb0957423471. 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/QM3DF2294281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481264d14290d85f51ab121eabf4b760b68ba27e41253d1ca413a3e998d0f701. 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/QM3DF2294282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b19ced2971a2694fe063e3e14bcee28989395179858c86aaf66b130a859672. 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/QMANG2220687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe76195e7998cbe99b973a88a34a42b2bbff1b0f44362bfde8b51f457b810367. 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/QMANG2220691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613b3a8f1a39f6505bcdf6faff490255eaf0f206511efc92f583b9f2a72d85f. 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/QMANG2220696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475163fbb3d3cb33aee94d6e8a9c9c2dbfd244a9b45c289b596e7ab88ed0462. 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/QMANG2220699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609d1d733f4d022da59859a097cd188b44685837b7fdc2b43a9a667904d0db1. 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/QMANG2220688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398907f5cc583a87d7cdb08a91b6544ff0efea1646c99fda5298985c0ae351a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US3DF2407372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5960b6423d2f05f1d8ce929b5d8a8e398681fd044e4be81c7c93cc26f57c44d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2407374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5f313d71b194f0c5cffaf20cf155ad3b1eff28f89b65fc640bc2204de4502b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:50:42Z), 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/US3DF2407375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6912b61c316fc01290aab124cff898a52359d363beee79b5c6b8b6e65f3af10a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2407376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c3898fd9fe23f433885ce079c2f18db809abe9d679f2c87c9373b5a760155. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US3DF2407377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd6170b2b309cdfde8472abb0302f8ea39f33b329fc5541f1fcf820b47a86f5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:52Z), 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/US3DF2407378.