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 0xe843612a05cdacb710e0d5fc7510f5b82462c89baca04e6881750ee889f96fef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5357cd3-3d58-4def-b711-7cc392cd0e02.json and https://artists.proofprofile.net/proofs/artist/e5357cd3-3d58-4def-b711-7cc392cd0e02.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 0xfa546508ba5599209f2173552b6b176744b6fa1c5047151076328372e24568d1. 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/CAGOO2439628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b431919df3ead38cc73dd3d1a7fd6c77ba1ebdd36b22b1a93a3e5adcc4e52d. 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/CAGOO2439635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3d99dc6f9d31f572c4a42e18cf3c64280df00d7f80abeb4c04b1cc9c54bf2a. 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/CAGOO2439631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716384f2189a174d5381c475b6fdfa2316b08588604f6696e3c44828712e8aae. 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/CAGOO2439636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eeae25836ee0f8ab016c023d2ddb2cba740828d3c975f22d2ef5d77948af08. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:11:42Z), 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/CAGOO2439634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f701ac82594438a889485223b2fea3a324359ef46b188c7321ae06c3f27e1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:11:29Z), 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/CAGOO2439630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6073b93fd4a7962c51ca8ef4cbd01e32b1e38009d7c4294560b8f090b86dc6b4. 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/CAGOO2439632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106869e0f3675dc94ee568c16bd08686cc6bc2d6061b630353b9a74483d94826. 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/CAGOO2439633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4c8078bffdfcc2784e042b966562ae7cf682a202fe356db4080013c69b515. 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/CAGOO2439629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988ec271b4cab62d99417b0d58daddc076c610f1b3cc472e54c73abca8ba91f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS662439987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec276314a76e0d99ec065b37c0c6d4f4c7e23e045336d00222de2c8c458dee0a. 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/QZTAT2499627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db701b989b08012bd8ceb906ed9fe0d59a53f6b9245db13555ca13f12748c60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB82446288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5097c17a5e2c1259af5d66fc2cae7fcb528180b0bdab1b4b2b4a0dc45f6cb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXA3V2406815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d066b93c6b66618b2ffbab22130607efae20346f57893adbfb7cae9e2312c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWV2450999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1319a7c47b971f08a1766f53011061ed27d433d636823e89a4057be7d7f437bd. 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/QZHNA2423005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29882f3511dcffc1c7d5b747b8fb5d67e2166e06696dca1b94f0c95e2298de5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHNA2423006.
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