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 0xbc723b27cd5664897c79dc818add88281ebc1e8e3652e528e52a3145e6f2015f. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a17b239-036a-4e36-94b9-e9446da51083.json and https://artists.proofprofile.net/proofs/artist/2a17b239-036a-4e36-94b9-e9446da51083.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 0x1042ea5cffbcd0f019c0a97e44779cbea114065a8358d299f7a0ab892e4fbb81. 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/DEU671900915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f5d7a79c9ae362b673ca956a93b74c0d4fb7e69cd56bf1ed9b84d1e7ecf94. 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/DEU671900916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0113a62dbf15de08396666c8e306f456ff29454efb34b98f722a034a5a502. 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/DEU671900912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc559c168f3cc6c5495b8422add8f59819a99915a0e4dcaa04b349e037c3fd57. 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/DEU671900911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc943d7da9b2baa922ca6a167f50b24d5d54344963b28a67ef638b6b0596ee065. 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/DEU671900913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fb17e6f59677ed31912389249c703149f6c14d1e5bc018f44bf61f7aa6fc96. 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/DEU671900914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0113a62dbf15de08396666c8e306f456ff29454efb34b98f722a034a5a502. 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/DEU671900912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c63c671f2864664e34bb4506221abe6e3a7f1b0ee869917bc55ac62355eb6ae. 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/DEU671501589.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f03c074839e7e071dec8fa08264c719d14aff5122a6ded63e5d5fdb78c8151. 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/FR8GV1922770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc813cbbfbe8438092950b079688bb1cb52a4e0c95945cb66d2d8428256b3923e. 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/FR8GV1922780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef3efb6a79f395c50acb1c531cc7d67be08576357ba249f8ba2d426920087d2. 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/FR8GV1922820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7b054bba415c05793f03138b6c16bf1f4845d29f62a675b2ef2819e158add. 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/FR8GV1922840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c250ec7745b3931d3f5d874d9ee32b3d7c30d31efca33d73d3ca2b506bc1d4. 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/FR8GV1922850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd854dfec786fef92bdec007ee4dc01edae187fb5f43fe5a1683ddf407f25e2ac. 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/FR8GV1922860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afc059eadba9999e45db0bbf94e0454217538a755088c3a5c443ebf007f0373. 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/FR8GV1922870.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109067d58af93d903765b99161ea0ea1a40f0418377d7e56dd45fd1d10fb767. 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/FR8GV1922880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df7eda24ffc6b08a1b08367b1b6ed0c1b2104335234ea4abc5dfb344fd0075. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR8GV1922760.
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 0xfa33863fd8e9af62099520f56e3b191e0cbaa562a1bf963ae46260d3c6ea45ca. 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/FR8GV2003590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a13f772820c84e7cc2fdf8e4329f2c40860cf51e49cea9c24670e03fab96c0. 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/FR8GV2105140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db236a9ac20f2d9f0b3edf71e33fb5d57199d2ad7fb4370af25204c9ab0388. 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/FR8GV2105290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efd4973ca5aef303f1de67271af670d54279f8a527995467b52e75d2c3afc5. 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/FR8GV1922280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6e55108eb15c2f6f7c7cce617b5081309ce3dca7f6e72a5be2f7782d735c12. 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/FR8GV1922370.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c1af4a5cc7b7bccd01e545480f36f0b524a048dbc400298d03d29c9d59011. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR8GV1903460.