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 0x9b7e835adbcda806ca77f664ed628543a911f309cedea218a046fa5dceb8c391. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5a1e18c-9e70-40a0-9850-8e1a46c62f17.json and https://artists.proofprofile.net/proofs/artist/e5a1e18c-9e70-40a0-9850-8e1a46c62f17.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 0x1305fa4b7dbe8779057e7b77e542584a085e85acf49cb8b8428c3946dc356a99. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:05Z), 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/QZNWX2209502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5678296bd29ccd11d12a573ff270d9bd476bfd4be399339bb2a63869366f2b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWX2209513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed17c72c0bb80d04dde7b4531e6e65f06f55b0c7e27e441f0e3b1cfb62e0a766. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:35:27Z), 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/QZNWX2230378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7850a3aef17048b8c248041501e008703ee1f9d62ec02fdcae3fa4e14a55a61. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2226489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06433ea634e83284e6d8d6479aed89c878db4f713c6a3ff7b597c990b1270fc3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWX2222848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e8d0720d3eb0d92eb9f12fe41aeac16e4bc6edf2a9b01fcadb0414230235a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2209509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e02e0d1b73f3cb921a9d7e3daa2cf30d433acda00188fce7f5aad979cb0bc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:51Z), 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/QZNWX2239339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139f5d0f2f0105ebc2d582fb2594e1c621b294aca1e25e3e76036c0bcf0f915. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:30:56Z), 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/QZNWX2240031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c61433a1b79b57e8e075b8edf7d46fefc88539407e0f7ff7a2f43082f175d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2239323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d18592e811dc2ae701b7eec37dea8d1d5e343ac516e761590fee74b02f04d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPLR2291475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb822b7d11051d91a05018717c891342ee6d6be67f2aed13e9924a35173a705bb. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPLR2290906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22420544a5d3e01322fdd2564e39e5fecc18671a2b060ffabe0f138e1a71c737. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLR2290914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a24c22373328fdabd2a4a92ea10e5823b5fe46bf400734046a02540a647c17f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZPLR2291477.