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 0x75274330f2aa0c2e37f7c1c58f797a635a81a603d7889f80e2e7bf68dcfea327. 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/4f76c93b-e1be-476f-95d2-a6355106ec75.json and https://artists.proofprofile.net/proofs/artist/4f76c93b-e1be-476f-95d2-a6355106ec75.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 0xbe1aa052bd3e140bd7cd993f3fc8a5ce249abefe7cc39742e0e3fa311b4e7491. 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/USCGH1199318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87b41e954d05e32658400704b59bade63cb5f8bd73900b705fffe58e5d589fb. 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/USCGH1199319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e5692dc6304a47b1fe7ab5fce5f8e28d25c51af6f61b24a473f8964726f6b. 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/USCGH1199320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b6e95aac7c2a32c3f17c9a4ca96b922a5fb6e78e041f66f3cdc407e01d6bd. 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/USCGH1199321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4668baa5c429099bdda4ae7b4baaaaf66158962843b19522da94719f219ab093. 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/USCGH1199322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70294d70d290f16599343d2829bd785348b23c105c3972d704e26968aadbe0. 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/USCGH1199323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012a127dbf80a963479cc19b3cbf71bc9428da6abb912faeefe9575bade2fc56. 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/USCGH1199324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6a3b76ae9cb1e3881feb3a4b9f22fe0169e563efa578eef69f7943753d286c. 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/USCGH1199325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2fa440327af49f6e99b35ff2d89c65c64fb7df2a1a920d6d90b5c03c027958. 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/USCGH1199326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66058a80341735d1a6bd66ebd3670602d2f617eabb63f1eb1507cfc3ec27924f. 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/USCGH1199327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39337bd97dd7c52cef17a24ff85e97f3418b09e39eb3d2b92ab566cead4a1e93. 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/USCGH1199328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc12e6c656425ad74e1ddeb48c34930fbad0155af99d05e557806d2ac6fb6b. 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/USCGH1199329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e8f75bd9d471eb91bd385981290c831c5a8bd38de70cd8666f2acc76c861cb. 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/USCGH1199330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d85dfccb67954dec32112d18d958f42d4d2af893a693dd7649f40501e4313b. 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/USCGH1199331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c22918f2378ad956b30ab092d1cf84c5b869e3dfbbaa2e64ca60cf278cc55f. 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/USCGH1199332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19812ab4f45ea14ed9e44f3ef8de50b1d000fd3e4869f5b2ed8faa7abecbae57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMAAK2054295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1310252d61c80febb51a7765c9a786ded41c4b733e9c76bf461d7733f5072534. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMAAK2054296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6520bfb4af003d1a7d39e7cb1fe45d9018ea8fe8890c24f8b976b99804c97a8. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QMAAK2054297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea05fe993b8ba42491739619febdd2cd430be0f06a62dd0058e304f857d60910. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMAAK2054298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f87396a4a1731a0a6fad6267c5792c6ce341adffb97981c45675b4a1b01fa2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QMAAK2054299.