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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef4504c49439785f1ba25d5b93ad5c44bab261be807deafe8377cef34d017d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a71e034-f394-4f85-9841-e84ac730a815.json and https://artists.proofprofile.net/proofs/artist/4a71e034-f394-4f85-9841-e84ac730a815.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fcac4f096eb0471bac3ff6771a04bed5568d80e7ecc7fea50b41993b0db45. 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/NL5WB2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c53f9da4af400579d97933d044bd1488a5e3c55237a6e426ca441075e0f66e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHCD2101959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea027441afe8a26ab45e18d9b0304d9d0386cc0c0ba8cd447aac67340df9273d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHCD2101962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec672b066635c9eb52ac07dc173b4521d6c348754d8f87c1c4f1b3359118efa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBHCD2101963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b281d8e0a53a54f266e2b0f1fc4539a8fef31a87506b8be65f61380354e1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNMU2361568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5571a81aa42b3f64a321da6c610ec4cd19e537973f5ead97fb9d29c8dfaf2646. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR10S2146342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf1b189ed7042cbda852e7710875e190f70f5f1a3fe1801a8155e2dfcf6155b. 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/FR96X2058651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba4f877399f0c82d1701eef80588ebc655a6d94184fa3d876a7f7b47c41c7b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR10S2146346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5b80d7bd2ff4d8500a2d2ea9746d2c66ca056e2fb767ba79c1c07bf398318. 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/FR96X2077376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb138d7068a5679fa70e5913a194f0d423b8689d9002268620e6ce45bf07e21e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X42003204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cb4ac286d8ec66f50be988ce4a4398afb327fbcf3215c769b3d50e24ded9ba. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282066481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240cfcb092e39f235d778b1e542470d4af66438b612cee24b5b0a68d8244057. 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/FR10S2146343.
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 0xd52bf9cc7f3e9710df6ec723015b6629fd9e13028003a8bdedb8ff355db86904. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202124066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e50d74f3f824d9a63390b0daafa5622b95d572c94bcff90cf4c0174acf4348. 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/DGA062215850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2626d6da1fc63ef4686244f4987b284a943d3866a3d8d2236f77de571a415c. 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/FRX452231632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b15938ab6d41e484b796e68d050cb16ae417850ba40abd7de91df59e36b4806. 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/DGA062215851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b41c419ac3fa920f2e77618afaec1ae4d3a615d2230783f157210b077564c61. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA062215852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee96e7bd557f57a84c19d060ddacfc9b721d03d2bf31e90170a0d149e639403. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA062215839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a7cbd110e7232ec67a423df97c018f76fabce1afb538ad0b9a127c0f507c4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S2255411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe507a19a7913c941e482e32cec85cfdbec7fb3015989b2037b3e790aaf837a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR10S2255410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab39ae07d5192dbc9c65e031d0afd062058bc37751dfe0794a86aecafa0501af. 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/DGA062215841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa882d56aec965d8ec59417cea1b1215235f7e3221d62ce96bec56ecd528055d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA062215859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37c49ac983d9a5ecd8665fcc89b7ad1ab9f7bed8c398c5aa3f18894ecaf945. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA062215861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1433f936e074783e32890ec3639183fe94aba65a6495522e8d6d51b9ddff0589. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA062215864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f3e33b7858bb9c1dd81c300c6bde29ca41f39578d18173b04ce196e26f2a30. 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/FR10S2255412.