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 0x0905a5bba2125cb8246d95af7a4b22b57ef0812bc46c8d161a2cb39d1e775796. 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/2c6fb95b-4bdd-49f9-9ab6-b74a3d6f978f.json and https://artists.proofprofile.net/proofs/artist/2c6fb95b-4bdd-49f9-9ab6-b74a3d6f978f.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 0xe4f0eaa23e5bf3ca7e5e3cb815160c40677895d0dc7979de89c7f96ba1b3e38a. 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/QM4TW2200724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ca584b472a12531cb9273a423d32fd34f49410acec9bd2b811cb3ac58865ca. 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/QM7282430984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663059e2f169809d4341d982c65309ac8a924e266ec5fbd5fb086fc161fe2475. 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/QM7282430985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7bd65c8a96d0e8fc1b88bb34b3919e8de7bb10970c290e0c7964746f244920. 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/QM7282430986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492b5512b9910d1959c018bffe44b5728cb8812e5e2da2bb5b65fcec2efd1c2. 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/QM7282430987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18b6393b4bf917c39202abfc63099cd7452702d45fb5de7cf22353876df4127. 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/QM7282430988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b4e4fefe0a44f3ceaa16678224a7472c691ea3fd7afb3b29de8f048c1e7ee. 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/QM7282430990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb49c7e1195ed451d64ab354334ecd542ac4bcaa002682b3dd754b08ba83df12. 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/QM6P42416917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae98de097381386f93f717870b154f955850073a7cf78da11e6211d23b6c738f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM6P42416921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f78c7c004b4af1f874181201e80fd707facc6d4f978df040c1ccc7def4f4444. 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/QM6P42532162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbd02dfd3c632111fdadb5b9c68482ccc2147c1909bd4cf64222683f309271a. 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/QM6N22519764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407ef1a0b58368a9fb07b132b8f2e15f759e662117e151f3042d6523ba0c4fd9. 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/QM6N22546971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d3b09a0d14045e0fccda01b6e84f96da8223e1350d6f6e29c5c04e5ebb32b. 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/QM6MZ2563288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21da5bef694d4e7a8570b340d6e6acdfbbe46b8df7fac8813cce0087b62a48. 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/QM4TX2570952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb12e5813a4924937f3b567aa3cf54ef9784558d19ca1dcf57b57363015b9332. 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/QM4TX2567662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3b749902ac105eaa5e2264e0f6930ab699347df8344286259b6724d435fc7. 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/QM4TW2580414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd567f75d6bd0835b8f9d0856a45797a53fff4aad261b8da907ae2c08180602. 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/QM4TW2558825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c51974f0eb4fca1ad5ce4c6a6a4458c40c8e9fbae4f23547d5c8bbe4ccd39. 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/QMFME2475870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663059e2f169809d4341d982c65309ac8a924e266ec5fbd5fb086fc161fe2475. 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/QM7282430985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b4e4fefe0a44f3ceaa16678224a7472c691ea3fd7afb3b29de8f048c1e7ee. 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/QM7282430990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cc9cc301c2c621e8ad0bf3b906c43fc7a38534bb69a6e55a23df8d587a2bde. 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/QM4TW2472240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c1dfa224ae3ebe685cdced0472431a0c86ece15c7468fdf259f6d52c9800d. 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/QMFME2325978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b81dcb7d6ef150b6fae941d499c32c204e0493e21cffbca5ae70f4f9fcbe11. 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/QMFME2314763.