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 0x7f8e810c62741d5864ce2ea1504749b149f8d52871b3df9259d306929c88ecfe. 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/1dc43dcc-4177-4365-969a-1d1f97c9cc95.json and https://artists.proofprofile.net/proofs/artist/1dc43dcc-4177-4365-969a-1d1f97c9cc95.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 0x57f34eb8ab212e9c32e057a9d1a5c7f3af27c678a248919ffa7238a4a2bee738. 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/QT3F22404695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e056ad7b26c6765fac660f5310e1787d72bd0b67cef34dfc2af5ba38aff1adf. 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/QZNMX2489486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ea99c33f0e4f82e3e32e5332663260c8a2cb713b8bbeeaaae67dc736fa9a6. 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/QZNMV2413172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e25bb1814bfcd4cb2ef92b55db50a1332f99ec06bc282af0efccc2b0e3dbdee. 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/QZES52419902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc407233de828f7263c31eb8c7213d987d67dfe861245d0ba9c24eebb532c0e86. 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/UKW3Z2101787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d6e6a8076bf71ea10e56751ef0868aebb62a4ccc3ccc662beccd0391d5b2e3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES52419903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f6195d889d39009712f556150ed1aea5c166192a69589a0d55e238e229047. 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/UKW3Z2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7b7222c588bade11cf477878262c5ec1cd961cabca83b9335449dac19afebe. 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/QZNMY2334875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35963c2a4a6fb5dc71d3540fb0da081375cf53b4ce8221e743ee575f9429915f. 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/QZNB82388874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d7761da04195e30f8dd43e160f42d3dfea6de1e0ee06bbcaeb1643d91bada7. 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/QZNB82253878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceeb3639353441e96839cac3e7e3e8f68ef9312a348a91b7b9b2ebf6286b888. 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/QZMWW2109041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cbfdeaf2a47a9d18815f9c4556eeacd8575b42f28aaed19fdda46e7125a68b. 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/QZMWW2137953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b6a3957baef07a57e2792ade7c47ae7b328291cb5366be75d91f424e2bd55f. 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/QZMWW2157804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f5a355bdb71ba9a27cc8ca3e6a304900c0509f954562702c10796b2309753. 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/QZMWW2157805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf490707df9981c9c8a1dc7e18c167e3197613e99c1843ba4a3ffd8eccbe55ac. 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/UKW3Z2000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cbfdeaf2a47a9d18815f9c4556eeacd8575b42f28aaed19fdda46e7125a68b. 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/QZMWW2137953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceeb3639353441e96839cac3e7e3e8f68ef9312a348a91b7b9b2ebf6286b888. 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/QZMWW2109041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc407233de828f7263c31eb8c7213d987d67dfe861245d0ba9c24eebb532c0e86. 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/UKW3Z2101787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba1498a8307f90c35b6c11574c06c1a2b1e78aeccb7699fddec1316804fdd57. 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/QZNMU2169494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf490707df9981c9c8a1dc7e18c167e3197613e99c1843ba4a3ffd8eccbe55ac. 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/UKW3Z2000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eea36f6b070f9270e56850b7b70315f4ec6a066881e3ebd87fffbbfffed89f8. 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/UKW3Z2000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12c53cfdd88df264efb7818366d2f1e256fb933e6f0496d4b5c2b1a8c40271. 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/TCAEX2063107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92166091c19216062dc3779981ed7706748b500642fc06f3b66622b9fa8e2690. 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/UKW3Z2000512.