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 0x79813f0c5b25080a17d3c526dc79dc63ceb8e277eb03257c4fa442783a955eda. 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/be558d75-5b6a-4667-9db5-f7c925c7a1db.json and https://artists.proofprofile.net/proofs/artist/be558d75-5b6a-4667-9db5-f7c925c7a1db.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 0x5a0c11743fb027141204c64064eb83e07b010f28a438b12a2a51373656211e5e. 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/BKRQM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5064838be167107df9924f1c1a8fcb91caf9f554acf8fcd4cc873286e236355. 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/BKEHX2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b7f2f6d18b7080c3e4799178b5f6a9a6fef05b7bab750d6c47c0ec6f6f334c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:00Z), 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/BKEHX2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ade26a88d89c4ea1f76a4f19b678ff7e660554f7430a3f86e7677d16d9bd24. 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/BKEHX2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9996ab4c2de75d55449de8f3f691a4f83a3cf9c0b9bdecb60bf3e9700c9949. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:01Z), 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/BKEHX2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ee8c6b8106f99ba8501869ee3767fa77d04d866eacacd7d165c2342b194a5e. 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/BKEHX2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f72c5fe7596bcf382bacbf258ae53972a0825cc92e159a0f249b14f254d59. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/BKEHX2500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc921b1580e58f6ec4579b870fb4ad5bfb53bb46465531153d6f92e5e514eecce. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BKEHX2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924b26076a098b8de877e1a8957fb575c3a9a1be27d95b9d3e8fdf4b4c5b4efd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BKEHX2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37a1cbbaf123399fe7e91a431721d2c75537531d73f047d3a59205585ecf015. 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/BKEHX2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3030770ec5da170bbdfcff9d529d91e817d5daf3637c6fd3e31a65b6eca3a3. 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/BKEHX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4257fa2e9ae81e6155f98a6a4a8f7b359b4f76c04304388cbe5638dfe70837af. 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/BKEHX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3898a909ee382f8d37d953d9367b617c7d026539e4305b7086b0b39cd1ce4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKEHX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd0c20c8096f0b83d1f977aecc0aaf6186079c221e50752e887205fcdffc6e6. 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/BKEHX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a915680faf40132250f08df51219fa855b0229da704ef7e5869fc4c6bc388cd. 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/BKEHX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d648bef297385fa3633fc855c5a7aa7cc1da78cea8afd11eaef2bd363516fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKEHX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299ced5ef633a6d59aebc2b1ad4dc77441c8302ee3dc02824406a05bedc89932. 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/BKEHX2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64cfcfbbab37151babf15564ebe6bd06c8db122639310dec2e56992904f25e. 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/BKEHX2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa63662284c9c7a1a2d17fd2334cf9cc1e73d09dbba31b3ef8cbfcdf1c64c57c. 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/BKEHX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f225d454efc7352a9f165560487effd3d4464ea7a13cba0cff3a37e686db33. 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/BKEHX2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c142f07471e88a2807ea4e7d5ec9650c4c933e67dcf5c6ea2e67540399708e9. 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/BKEHX2500002.