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 0x4f643294d4f350bfe7cc6ca213b5943de77611fa22babb6a5e7a47ac63c4b1c4. 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/6ced333b-afa0-441e-a3d2-7164fd764705.json and https://artists.proofprofile.net/proofs/artist/6ced333b-afa0-441e-a3d2-7164fd764705.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 0x2374daeb088608a71f09fab0dac83ea456bbf9c7beaab88f730303befca09ed3. 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/QM6P42305642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc878ebf68c6cfb6b3fc2d14fed6bf1b0c3c267874b31cc90bc0ab1ea2e6a21b2. 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/QM6P42305648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2307e19ba96a95486a28c74f189a90931969463123b10c20064f345f63cdd77e. 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/QM6P42305646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32cec5f4219edd975214629da395e9bdaeaee5fa1fbcaf28a68659eaa20cdaf. 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/QM6P42305645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210aabab97b765cc7077247bc9ea2d6147b55c593974ad77b07ce19b7385b01e. 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/QM6P42305649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0af5bdf8af231c92c5235bba5d58e2d31476e155a7ac197f58250a4c3b53043. 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/QM6P42305650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f105c60c67141c20565911f27e0b257cfc23751612f9f997c338530de78c1. 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/QM6P42305647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9aef732badd49d3f2a7519cca118b8aec10ccbd99c88d252ca9da995f8bd75. 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/QM6P42305643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32cec5f4219edd975214629da395e9bdaeaee5fa1fbcaf28a68659eaa20cdaf. 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/QM6P42305645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90473ee33765f2b10f16f782f7b7dde8d16fafe47705edd8bf21dc751dc2185a. 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/USZ4V2300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b04865324010b40646c1eb286c6c87a31767c016d258acb30526370a1dff608. 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/USZ4V2300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9730e627327dd39bd251dd0c92ee7dc0086e5904b1776f47a7c54212809b2c89. 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/USZ4V2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625f37f2d7776bb2c5128a1d1bf7529d482c77c6c3194fa9f0e72b14d83ac8cc. 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/USZ4V2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6b459a92b4ea417962342fa36bba483a2b5b6b5f65e7a58b36e527e9782f5. 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/USZ4V2300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab95dc61a499d6576389411e83179baea1b68649af750ca60e645e2caf59315. 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/USZ4V2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c0d2f9acf8e73caa9bb0451c901002ec762059dbbe122a45801ffcf264359. 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/USZ4V2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90473ee33765f2b10f16f782f7b7dde8d16fafe47705edd8bf21dc751dc2185a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USZ4V2300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c7e46fee99eb915100e5557730d4905f7a90646a006aaa47fa916c4ab8eecf. 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/QZMEM2164464.