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 0x3cdfd4d958ac37e15f7a0a55b876055d919cd5c671646d7b3c9d713fe6a9463d. 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/7678d96d-f7db-4f95-b9c8-8a40241e6d3e.json and https://artists.proofprofile.net/proofs/artist/7678d96d-f7db-4f95-b9c8-8a40241e6d3e.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 0x5fa66ad69171ca89939d021b0f1b35cfcf2f40b3bc234f1e2dcb126d013e09c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR2X41825714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b78b2910208d5fe91336dfeb92d0bf86dabefd386540104d4253e29f1c946. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR2X41842077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68258e1f3032e3ed3e1e0ed47f0ae93679bba3d5c1ecedb18b69cd7065f62336. 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/FR59R1859949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6823d8e312168434f89f51dbbc4a75ba360c313a59e24c6a20bd20768b41cf31. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR59R1878358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1f5ce7b247349dd882cca42ae1f63d88a314c0678e24a5cff2462848e4366b. 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/FR10S1925014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bda02273cf023e91fd471042a6fa7db3314ce2fbb024bdc5405216440b72a13. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR5R00909455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a0ce2c5568c28ba1c7a2bff39904ba2885af757b40b0a6c526111deadc364. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X41933810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71822e0c9a7ad937af67d1fc96f75bea293f5221fe78a04589df63246107a15. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR2X41933812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe975334e009fd0cb9c89c05abe2d2c11aa1b5a0dd85c1a9eca550c10d3df00. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR2X41933815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb407a34171088e746bf7a4f26821de5a1cfecaa796931334d09a984ca72bcd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FR2X41933816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a2c9b3eef3605719c8fb51f3c3646e7a620075807674513904ad5aadec20c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR2X41933819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf86017a1a27cf3290e2f5f3d7126deea53f78522d30b4cd5ec0913bb662cc4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR7U61900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fb0e04d4315ac5ea83840a3a36cce8fdb966528de64aa76f9e5249296ad448. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX201905137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02bbf26891093612a655759d4f6305302bf5928911d7fe08e8e05c7e75aeea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX281964271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0468e2aa504ddf403cfff5f46d9c5770d5bdb6e35c596713282b7c6a26d1b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX281964264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7331f5b463ecf47dd87afc0a66d553796b471f22bff590d702ad01c3634a89. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRX281964265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02bbf26891093612a655759d4f6305302bf5928911d7fe08e8e05c7e75aeea. 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/FRX281964271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396f111cba1292318de3f6c6ad2afcc8fe474f6e2e6782ff2905ef07e424d73. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FRX281964272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fb0e04d4315ac5ea83840a3a36cce8fdb966528de64aa76f9e5249296ad448. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:54Z), 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/FRX201905137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df621492ef31b6def0229b67c6f45711b3c58ea81ea1a08f7e1cb1afc0cd6b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR26V2003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc48f49fe4eacfa97805e8296b3558f93e0d658cf179d67c0021b223635f6f52. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAGB2282357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa013eb7b1941aeec2e02c3161c15b87412f5921e1a3566b66e21cfd74a915f27. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIR2432436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b563060d3dae35b94425b9e39541ed40e82efaf54a5d4445900f49f7953604. 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/TCAIU2436076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69805e148a4fe080f9792245a8ba26c4bb979d654f43262d706dda735de16189. 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/FRDKY2000060.