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 0xd19648eda6f250620a869e812e20f9ebffd60c03b6280ff89b53b443233fcf5f. 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/1cbf3edd-8a21-4851-b365-917a3f1cd15c.json and https://artists.proofprofile.net/proofs/artist/1cbf3edd-8a21-4851-b365-917a3f1cd15c.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 0x642c9c8a422c5964a608a20b9d745bcad3de8c22f6aac1b9d6934a1cd8e316a3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRX452266308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd3a2fad5df482cbfc3c38990d69065f8861e38c4455842b12fcc5d9538894. 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/FRX452226473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81875af66d47a3114385d9518568540cd15d4f9a806434dfe14544954264c7f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRX452266311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef09f9291d771b049adc7926669e9022629622a473afc1bc52842248065dc262. 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/FRX452266313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f0a53b7160c5c812020d9630ee4ac3bf8c8d14c2518beafc3c809d76744632. 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/FRX452266315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245b2bef103c2ecaa23b71f58eb7592f8d3ce5969cae5480c7ebe8bfc424628. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRX452266316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656cbb54258d1f3349a002823b2fb3bffad551501877a0ec610956464326080e. 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/FRX452266319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5d510cb44f29a7e6055969d9e69bb6ae2ffd92ea6433317228d401bd3def1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRX452266321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84770336af2a02a9fa42f8067e3e9c94538de2787d88b3eaa48341a1307b726c. 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/FRX452266322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f24fa6826736d67562f581403560a274cb465b5bc3c6cbeb0f4e0d2ca5387e9. 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/FRX282139999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54560e1838638048cfb5b4a8a0f32b89205ee5d71d2cfe56fdaf6a3d8e0d0871. 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/FRX282140000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93802fc917f04a8b185d7b09731062935bfb6c9f7dabaf8985a9f2e58aa26d7. 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/FRX282140001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2426bafc846f13379425c0f71bec926865ed1d53c296ad9f2a5291bc35d083. 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/FRX282140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f1a7f93ed54a08f6822849addf967c68a65477193f2fcfccca37a85f1c8065. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FRX282140003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19623aab680ab8ccb9421d3ff7683f226fde9021c299fbbd2af42e2a4ade66c2. 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/FRX282140004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07555628f985d92dcf9921834c7823dec004dbceafff5fa5c1f45cca4c1d9cc0. 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/FRX282140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cc84423e969ba198fca8f17f74a44a0530444d5069f0a948d3d6baee09541c. 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/FRX282140006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a09a242ebce816e9679c99dd3817a539809dc9b11b7fb9da0fda62b172af7ac. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRX282140007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35db833a3eff577fe0100f7b768a43772407dfd9719f4a1ee6134d88dcaccfc5. 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/FRX282140008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385a05cd4eccd1e16902b6388af7eee9de04c0a4d9ff5a487f6c3415f03cf8c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN41993102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a5b5b401add7e592df116bfbf239c502a311672185dc42a1451771076cde90. 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/QZHN41993112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8852fd0b9f4401bb09c6ad84919c138c23afa59de967889042c96abadd2ae9ff. 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/QZHN41993113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d46a7834ee8a5213cf46b26d07449fb0d1bb0916c56aeeed08813dd82be12be. 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/QZHN41993110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe052766b84bcca90b754389e4aa45675330eac7efae053631fdb37c25a5ebaa5. 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/QZHN41993103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094edbc000c8e655e9c144dbabf893ee88b6126e91a5c0b85e4dbf6c79089ad. 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/QZHN41993104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02390ff271b7609077a22a5abfa698444d05f9f4b842d097946cce420243231. 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/QZHN41993111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc8aedfa7ac1314c440d0e7a57dbfc6c197acbe656f65e51de76105ea27efe. 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/QZHN41993106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1e928eedcdd3fd14784fa008c5e4cdf389397c1a389221e79474cf128fd8dc. 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/QZHN41993105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22a2ff68cf8698b734b122019c1d7c00840e496832e33c0353517bb1237b4cb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN41993109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162beb6b7fd4d3975ee04a1b8452e96b13bec7c7374fa35bd393401ee1c816f5. 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/QZHN41993107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b5511619d7decb956416188394950caff5b442d583c6205411b1ed9e8a1ea0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN41993108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0516c7e1b2924fef8f2b2e8dd8bc9f32c9543744577c27f7be0385ec037225. 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/QZHN61978757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1601d8373de83775b731080632a447c260b063e64ec986a33a2e254b1253ed. 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/DGA0L2319999.