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 0x23628687035cdab00e775ea471d3cf9f96d8ce740505bf88546e930703626f88. 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/4031e522-21c3-4b54-b610-e2036bbd0338.json and https://artists.proofprofile.net/proofs/artist/4031e522-21c3-4b54-b610-e2036bbd0338.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 0xdf3dd2a6296c6e3fd358d2ad3d26c09bb066a6df825824a057096cebaf07009c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCJPJ1970634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac093d26b3e78f14a34fbfe7db134bfce50f9fc2a4292ceabfe74830bc87a4dc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPJ1970630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0c0cb3df654b913001b61d7544ee93a137fb9b2be7ec33851e7b001518e51d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPJ1970631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d32d12522980fe1dd8ba9862780d0d900a6ad8d0aef8c441692b8f20e8089. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPE1634571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676d1dc1b7fae43006099d80f5fffa69b2067a429e2a9db36499f1dadd4c8d4d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPE1634585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d32d12522980fe1dd8ba9862780d0d900a6ad8d0aef8c441692b8f20e8089. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPE1634571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f876a2ae4ae26a88a0cfb20910dbdf9deed634cebda2d4f9bfdf3ee17c3e38. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPE1634576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ce2eb84b2a15bd12c7d5c606a4356c6564f0d0f0b872c860eb14a32d667e5d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCJPE1612150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34261291c17bff40c277b678fa8a7c5f3f189a0f2ce04bbcd3cab742f7b579b9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPE1612158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139b5ab7f367cc4571b3d14be9e0f2c7758b50170c553cfa16af1049badd0bbe. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCJPE1663521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97efe4e90054b3ba43e3eaf282417a89ca7d94e6d4a71d469c93f903df91ffa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPE1663501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4a7f0aceb2c87459118ef8f42dc164c8335090f7ae595a41ce3594fe74a2c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPF1755312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84550f6acce4d643aea3e1316bfcbee5d6e22eebbf7c0353a7ab19962145872. 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/TCJPF1755319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728d9135e6abd121fd4f3670bdf2552bc26d768f3422c53718f7d1cb8622612. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPF1755326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cbd4bf7fa9cd20633c8eed81b3162ed8fe3c5caf486266d69976b4e1ff0a6b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCJPG1854896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec822df2c9022a4983e1f3e893a8522adfd9e6c146246e196ef3d8bc8a551e93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPG1854894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea935e8b8ee64f3e94e203169a2dc09df139b0903c03e0ecbbbe86e807a227d. 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/TCJPI1840520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773f133f4638e92d3ada82f04f58043e8d9ae4cb2b7def36475126ccfc1f311. 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/TCJPI1840522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea935e8b8ee64f3e94e203169a2dc09df139b0903c03e0ecbbbe86e807a227d. 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/TCJPI1840520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773f133f4638e92d3ada82f04f58043e8d9ae4cb2b7def36475126ccfc1f311. 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/TCJPI1840522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f87638dfc169a1c9f7278b541ce0ce090207fb3045b060b2d73f7c6b96b7567. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCJPK1913946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515756e3a44a5cd90f1eac0da4f745df67c86a3759bc6a5162eb6fdf448b9c4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCJPK1913950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755018610a6c79ca646d1fca62ceabb61550271a4f891c5882dd507064515e6d. 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/TCJPK1913976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb0bd6522ddedcc7ae6da53feb936c20a8ce75266129374f7e4f4c22aeef2cc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPK1913982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35a5fbc09bb22ec45ee55d11acf93d80d409438a6557c313d9cb2abbac38b23. 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/TCJPK1914000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc724e1ff12620babe1c5af7fda449448c7912b95dcdff58cffb8952bdf108580. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPK1914007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c502235ac3685052b076bb6f5687ce1cd273340ecbb5e1062984d5a7c201a8a. 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/TCJPK1913949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8515756e3a44a5cd90f1eac0da4f745df67c86a3759bc6a5162eb6fdf448b9c4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPK1913950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8bfe84f4b9cafb8421248158e89a47149f8bb79759bc14198ad79dd2c08ae. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPK1913966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35097756aca9e4aa1177d9a21c4fe2b9eb9795049686faf226f884695502e0a. 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/TCJPK1913975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab264c0372a6c4d4a78bb70f16234e4e718cc36952ebaf5e3742545b8177fb6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPK1913991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141aef90443dd566b802a1582759ecc7bd5f908df13181a50b8fa05cc7de6a22. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCJPN2185850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdef8e0c73ac1b8f10468d8cbdfa10fe877e827f4588ea2f03a91b25ebb9de50. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCJPN2185822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d906c39cd6cd1e176ff4cacb5c94a66d3fd011399babc8db61190aa25bdffbc. 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/TCJPS2277030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd60fba29cb00f2bd4c8ae17f84ad36f11800cef5e1c87b28f12ba5f2e608b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPS2277047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0315f452df3acf9bfa4af7d6facb6ee5dcc6addd12841e9fb757176bcdcb700. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCJPT2236154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a091a0cb9ce48e5eb0699d208a5d344500b09f9cf191efb5f55852e8ec4e3. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TCJPZ2413592.