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 0x7c0644acb69f4e027b1ec63f2a447f1c8c254362e07d7f090cf6aa9a6c9ebb1c. 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/e42c52e5-608d-4218-bc8c-9c2c94753397.json and https://artists.proofprofile.net/proofs/artist/e42c52e5-608d-4218-bc8c-9c2c94753397.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 0xa1d750224f6481c9c1308061f22fcac7c6e88dfe861884b57fd21521aa8f1d9d. 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/QZTB42318794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc709a273d42e01aade73b22d98b5f6f6ba2fe3d4de1c0390e519a933051962ea. 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/QZTB42318795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ad961013e758798561f81376c9d7611fd4c6d68b08850d80fec044d41755f5. 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/QZTB42318796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ce863a5fee1fb510b923d5c4d88d87ebff7474f208c7a20576a91467cdcc71. 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/QZTB42318797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96bf8d4e57ecf7f385fbc3850f97c8ef48350642a937190e826eb59ebcc11b9. 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/QZTB42318798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e22a54c26ec237c9abcbe2f894f37d4462c3f45bfc1386595bbd62fd86dde. 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/QZTB42318799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec91107df4fe9eedad7252f784a4b4fd546f495a0804bb7d93e0afc1c7a0734. 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/QZTB42318800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff9ae2706beb27f92273f27970e559d68ac3294bf9f9216afe3258dc017ee8. 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/QZTB42318801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32456dec5880c8215212748866ed0744874a1f7685259ad6a8d829b7b20019e5. 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/QZTB92296150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ec539d067f336422370c9d62d4d5adcc7bfa1406fbdbeb3b833f5c9e0a62a. 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/QZTB92296151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d93078afb725a57aa83c35583d94040954aad3085b35e8ba115414986cd461. 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/QZTB92296152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5eeb5bc44ca7b395de9aa3ed57fbbc69cfc4d28029f6aea353ee36d8e2ca8d. 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/QZTB92296153.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20b1bc7f7c83ff855c290ce503d6c9e7f309de6f33117b6108dadc8f8ce02bd. 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/QZTB92296154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2ec851142db737b3ee9ac5abff52ed1f77d40c7b79d9818792bbc94e4e0300. 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/QZTB92296155.