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 0x6d61042b2bdcd88242794ec83228020d48a5ce87516aa08f1933203d49b5e9fa. 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/eabe27c6-bb3f-4d7a-8ee8-fb276744f7bb.json and https://artists.proofprofile.net/proofs/artist/eabe27c6-bb3f-4d7a-8ee8-fb276744f7bb.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 0x73192ef20653d7bdd842c9cf21dc8b7db10c3f1754c41a6218b76735424be881. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/RUB422002694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf51db238324b291d5a89ff114f2f497fccef1dd82eec681f3be559cd9de4dc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB422101778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a77ae1c5db710cde90b63fc8d098e9d55415eb606c6c3717f30fb53dadf319c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUB422104027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34573fcf5aa24246fa1978114e8172316d61f6dbdb5f41b687f87be7593a6b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB422201263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55d309fa9037eab46c363a72457637f339969b419b962f735e1854f24616f8f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUAGT2305887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7196cfb847225d0e20d49a8f7b4271a2e2b8e8f2535651d147c392c55f7bff7. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUAGT2328877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838535760fe7c75457ea8435af10ffd5f9ac22b6ee1732e459fa1da89d2ae7ed. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUAGT2327804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a642ced4f984d716f73c32971a7e71622b03dccc2d2fe15838dcb5c1efa6b5. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/RUAGT2346625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150c4375e2b47052375ef593de4eb8caf7790d36bbb4d7f03f5e4d79f56c7b8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/RUAGT2346638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72324e16dd9b690255e3a966c0e982067e037176a735d240b4314a744facc73e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1D2494156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da5ba2a10e923bdd40d0208d3a2b2adf4047c556b6208b770318bdee7d4a03c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAGT2445906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2ce2bb070cd71abb8740aa921f14d4a1932e359090c9bdf97189419a262f0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAH62405327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636437313d820c543968a29e4001052d2d372ff5392121dda254ce856d412d19. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/RUA1D2529267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253654ef275da00ea8fe7ce9dee30d63978af744fe35531c155df3acddb34a71. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/RUA1D2529269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636437313d820c543968a29e4001052d2d372ff5392121dda254ce856d412d19. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/RUA1D2529267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceed8efad379319234870328941402593f7b8a793280cd3282adef428bd1609. 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/RUA1D2529268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9849caf565d39453b31409d53a3ff7596c90958fb56c72da79fe8a2f913803. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUA1D2529278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4d6103c1fbeb192cef6ed7aa5e38742ddc9c64b367c494acb41d3d48f04cc5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1D2567869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1c25fa8815c43056642134c8a94a8b1a8c4c40f38cb41ed9a3f586014f7b55. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/RUA1D2567870.