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 0x4e3eb8332807b24b6fd924bc9647676ffc51169608a0ca6f2c6bfbe329df8c24. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0a41278-7d90-4e0d-b711-591a2e6e5cbe.json and https://artists.proofprofile.net/proofs/artist/c0a41278-7d90-4e0d-b711-591a2e6e5cbe.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 0x616acbda395aa49229ccbc9e26526e4bed6c32ea443f4b9027d7dedb3e7e2803. 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/QZZ662438064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef71ef09f46be388abec5770947c953b9d1beaa64b105a3441417e83207b4a1. 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/QZZ662438065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b50f0e9c544285626baea1281575fb63c6483eae90de5f9f677c183cb9849. 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/QZZ662438066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba36ea8ec20d1637d3b512b32fbbec31412a444760d76a37fddea0406fa6f59. 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/QZWDW2327377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31b0b705f0e34e7a39edb339f59c268bf8c22f5da62fd289455d24af493f5f. 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/QZN882324661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0540ace555139f19892edfa8b9c51646db53e6027b1134a3e8c8aa4627529a14. 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/QZWDW2201145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e6e8ebeff8572500b6653cdd0ea089294bdee3f6dc881ed42c84c13f9f2b6. 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/QZN882301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acb2a627dab044684fbf47545f749cb20d7a2fc3dea4009fb28d866eaf048b. 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/QZHN62230478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22ef71bd74f2e01a857be96d5570f3bfa6691f71f0deec13e8638092c9d0fbb. 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/QZN882244976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd60241a7953eab1839a21ec8e9dc0ee883037305676ad1dcefea856d485379. 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/QZN882244977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e193620a024aae63927e86c174f09d58a3d736c0802dc4daf69a89eadec0b1f. 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/QZN882244978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a25360426ba76f27a91e00bad421128517591e97b7e2af87368955b7ca94d0. 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/QZN882244979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe98e340eaf22e922944fde8cfc7b20b55e49bde7aa67fd258735edb47d40b5d. 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/QZN882244980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acb2a627dab044684fbf47545f749cb20d7a2fc3dea4009fb28d866eaf048b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:59:35Z), 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/QZHN62230478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690876c1e6d9ea97c8b18cd912145b658982b11c8ba9aeba0779fcecb9ed9a0c. 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/QZFZ62223489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2735d85e60b4bcafec6675026a1126cb4bd295c36c8d6ac953e3c7da064a4f5. 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/QZFYY2229398.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f421c1c1ef33481bc88199070ef196e703bd6f16ac4d7f0d9443dba4ee6c59. 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/QZNWW2114316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b445e888bd037acf8c0392bd04efd3b16da5e636d2b584bac903d33409c1e55. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2108687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad385c4cc5e46ff7b4e662005dfe2d4b3af4f60986753087c18d63742f38aaf7. 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/QZK6G2136547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe544f269fbe9b12c29bf2ac51c96cbc2be2163dee4c5845150f13896580ccf0f. 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/SKA012300458.