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 0x2497e269864d8bad3003ad2ba0b10681f4fb4c456a5e28015f6649f2a2043bd4. 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/8cfea4e4-ea51-4cbf-9f5f-64d746d07a09.json and https://artists.proofprofile.net/proofs/artist/8cfea4e4-ea51-4cbf-9f5f-64d746d07a09.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 0x8b0f8e67068b1ab0ae278d47c04b180a41ae34b5496afcfccca4793be46a07ba. 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/USC4R1021569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be190c9e675032a11aa105e7a01b66b512f830eaf1e192fa90db86ef81335c8. 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/USC4R1021568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1514eb34cacf4768926efeadf9081c84fc1fa4198878f7731395aa2bc24708. 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/USC4R1021573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c62cadccd79a7aa35e6202c6ae005b5092115c4b79f2c9c501648dfae91fdf. 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/USC4R1021566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28002b8eef9e0a49eec05b63eff34b9c0d4fc5ab3a2f5c7e971b4b644d03d8b4. 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/USC4R1021574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5054c0a43f3d39aa305011cb79598e606833ca9d6d59f2751b83f31183a7e1. 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/USC4R1021571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25dbee32539bea823c1165c682abb3dff69049d791462c9449fedae7bb6f2b. 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/USC4R1021579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28dca10a013bb7c8737665a00b6b48bac25ae625b6b3a3b51b9d80122edc9a4. 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/USC4R1021578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7f7359b4a7ff47282e5db4ab8335e1be2bab7a3ce360677f26485ac40228cc. 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/USC4R1021567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bab2d438f28f04233341c4a8eeb06e525a2ad1ce508b54428cfe0b681b710d. 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/USC4R1021572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a66cbf1bfe4e1e8e7991fe1c3f4b829090af38d6aa9b15b1dac7f8c182f96b. 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/USC4R1021576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c1b076d06eda5bba11412f111c9b89aff07e3c0b8339e0564f148d3fea0f0. 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/USC4R1021575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e5592d6de8a5542c39267b377cd073d7526be9ab8ab1a0bed827e713804a60. 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/USC4R1021580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4ceb0e30dc93988b764ef98e67dace6c50d13297b3eae421243d57abaf35ec. 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/USC4R1021577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bad624088360ed9d62bdf9466822f8186a6b7067ed1529c3631113f0f01d2a. 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/USC4R1021570.