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 0xb61366b03173520f5493e6357bc8a7b2171f55e6a61141b4d9865a7f7ea7d75e. 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/bdce8e77-5e9a-47f2-8c1d-8210be2802fe.json and https://artists.proofprofile.net/proofs/artist/bdce8e77-5e9a-47f2-8c1d-8210be2802fe.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 0xa4dae268e247088afffe697a0742eb7bbe90da39c7d9e0e7a541cfac2ceb93a8. 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/DEQ022118710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ae7e9acfc436d3c6e606130b1a0b51fcd3570f24eb78fc4b2ef27f945da4a. 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/DEQ022118711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d601e0bc493efe1d7760e486133c14618d52b2f7b0824ccc5c418b3800c7e49. 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/DEQ022118712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2764ea558f1cf959a8e8b2ff9a917fafe43789d9dd30d15b8a3f52ff96a391e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEQ022118713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df24fcec906ae2c2b309c62e659504a251f10b221bfe8930940cf79f835f466. 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/DEQ022118714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b5f43b36e4fe695eb39e50c74e02fc2de3581ffa3d751827f51a9bb391dd6. 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/DEQ022118715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdd511f2ba6a4048a9225343d37e1a49be7309fbdf6c639adc470eaf22b5d92. 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/DEQ022118716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f1be175d66c66632a531d6428233e1ee6f6ac657cc655d177cab2519b8806. 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/DEQ022118717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26da8046d08113035a0310e992c04bb0c62c7890a0a8131b94f2190cbaee1f. 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/DEQ022118718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72d04ed4a71b64f5f33730e6eb0f3c7237666b18f3c37a6338d824a86f082a. 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/DEQ022118719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b4850cf4a4ec44027880e29a4ec7758bf66bae5b30a090862b921ca02446d. 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/DEQ022118720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ffb57a555e1267f244fd33253dc3b9f9be542217c51bda227fcf951ed9c126. 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/DEQ022118721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183965dbd082b30c52deeb45285bd4c2be6c4a69c32c67a471ed3f0525f6dbe4. 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/DEZC62408628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac56b604ebc6fd7d2624fa85d9068dc054c91b973f60cc86a0abd852cb195507. 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/DEZC62408629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d53fe5a5f904b242d7a878f6acb7f82f1e812306a84b12bb22b4b7779862c. 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/DEZC62408630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dc059715474b51f993f27c5b6f55c2e51356812491ceb93615176240511f7. 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/DEZC62408631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a16c93372d0b32d7152df9a2a3a56caeb0e4048ed4694c564debe17ddb86c6. 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/DEZC62408632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbcbe634a3765e01ebecd5c24b4816483bae30beba62eec91b139c8ef1843b. 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/DEZC62408633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4606eff459d7277c38319b9ba9de69b6c9f32f246e485b5c14cdeef46ff77b. 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/DEZC62408634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7758379cf4b54ba8b2cce4e0e2525de3b13157f8c709438e267a1c70cea02ae8. 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/DEZC62408635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d81b0833b26d6909efb4e5f810d01381eeb027716044b24542aa08e18af2a1. 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/DEZC62408636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72a1329aae5494d42d95db23ddf3a8cc7e636cea3ad211f44595b4943c52440. 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/DEZC62408637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae3626d9fc1e56f98f803dff2f79ef8c0af0374a2edecf4bcecb20198caca5f. 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/DEZC62408638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1966e364596374ceea3873585b344251bb8d00a90da6a57c122b5bd89cc7aa0. 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/DEZ651348157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73320388203dba641306a2a94ca4db48c1bf3a9a0bf65b8eaae384aeedf018c2. 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/DEQ022382359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f87e2512715b4e6f118beb122c95598dd585a9e68052d170c509dfca5fee90. 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/DEQ022382363.