Holo may refer to: Holo, the theme formerly recommended by Google for the design of Android apps, introduced with Android version 4.0 holo, the codename of SteamOS 3.0 Hölö, a village in Södertälj
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xb9dbbb9db04368d37fdc11f18d9079bf0af2dfa4619e89237d45ffc15b86809f. 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/e4489bad-1f02-4ab1-85b1-34ac14646c8d.json and https://artists.proofprofile.net/proofs/artist/e4489bad-1f02-4ab1-85b1-34ac14646c8d.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 → block OTSBitcoinBlock must exist at that height 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 0x6f573547498406e526a2601813004282220603a4bb3023f59136ddf052039754. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/UKN6K2001609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a697c2f0f0f7d70cd7c4bb6212cef78d9d7c9b2e98531749097acb7814cecee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKN6K2001611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343248e6eeccaa9fe919edaca486083a41325365e2348af655465f5dfa7a66ff. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/FR9W12135826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696c96bbc71adbe1522650298fb844b8ae9d8d9435e6cbd1a9e51aca3ec077c9. 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/FR9W12135825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd204241758913c9496a2ac2cdd05d4447839f2f655e6f3e58c803417f53a0a25. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12135827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89976911286d5972436dd1019622e399a0b5b2b626fc1aa4481121c3fc8869e3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR9Z62100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bac53d5eb3a9c12e136eb03bee81bd3917d388e9d8591c17ff9378d5025bec. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6N22244491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f6012d726e52e968619ec414110ce81c42c228b8354250395eadbc73e98fc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKN6K2202442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8601f7014ad0404ef3195657987eeecfdc016c05c2daa4b08fcffeb4987bdc0. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/UKN6K2202443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53e60e36bd3d9cbd27f82c441bde90e5416eae6125fec5a992cd463054b7f5. 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/FR9W12400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971603f809c84db3533e96300d87c2bcc9ff615b7f1a2a88c97fa661de9c5526. 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/FR9W12400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ef47de18951e08dc8aed9310c0f19c8846a746feee5c5a0b41b5ffd8666f54. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR9W12400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15901e17999096e712f32356d271e6978caa0950ce88d1d69b8a6b46bbedce07. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:06Z), 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/FR9W12400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e9e7fa4d0d8cb1d071cdd6fbe29b1db9c6b3cb2b29838132ff9772785f2feb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce11af4c27cf5dff1299fb0b9fc8d728251d49b94f568a8735d16b0b171216d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60191c60937519b33867423148d3faa5d86681f5cf309c01671a3d377d670ba1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR9W12400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d30aae22a17d90f1b85418d77db26878af445264e727ac801c4446b6204160. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:15Z), 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/FR9Z62400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094ee9526de7f417b747fdc50ebcc57c5c05a0175df5dd0801887a6a850e8007. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKN6K2402132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14c9848305471d9453b66417cf5c7bb169da0dc992ca369f3d121ab31c7c99. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKN6K2402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dace6150e3d629552c54a85f2c853f0b88e0d8443c778c9e8ccccf969ca859. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKN6K2402134.