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 0x34ea3a855812cdebbc5e3110adba52c06c44009272482d4b02cd3db6bfa2ddd2. 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/c385d7cc-605f-4f47-b6f6-5dcd3342ba4c.json and https://artists.proofprofile.net/proofs/artist/c385d7cc-605f-4f47-b6f6-5dcd3342ba4c.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 0x90159c2b114ea89bc3c8810233aadaf3248078c1261759bcc8e1d25f868d8d04. 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/NLT2H2300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08feb6888b3623d5bba029c227a8de5fb46552ea59942380870f19695c7e3167. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USA2P2201084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94363576cfa7569713295827c43fc2caa2b42ba24a4c534ca437b46ea6e0edb6. 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/QZES51887102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad8115ee136066b0d33906ef278ad4c5ecf521a43bd22c896d022c0e2ba0e19. 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/QZES91926931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee40226067d856e146080cd33fd596c4ecd72b13275c5c5c06f935ec76614ea. 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/QZFYX1928713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b31d9d46e668a97c9382a19dddf8cf2f7bd2c8a7a97718e95d6f7ee652af9f. 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/QZFYX1928715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ca8b389db8b70c7ecfaaac809aeeb934c121cd512c4c10b59f1d294624e3f1. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZFZ72305339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e4130ccd53c2a1d073d9481bf0df5bce7935543a2d83beebd5c0372479115. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2085820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c90ef1a2a7549268dd810376a771ee96d673f7d8bfd5ddcf77a461d291449e. 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/QZNWS2007614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb8ad6dfabb0a975b5e456cc735dc00f212c885f48de8cd44155e9886add1f4. 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/QZHN92125332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9a9e5c811d0ec45a66c488328d98e460f7543f62989cd90cd92721dc7b69c6. 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/QZFZ52103842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c90ef1a2a7549268dd810376a771ee96d673f7d8bfd5ddcf77a461d291449e. 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/QZNWS2007614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e4130ccd53c2a1d073d9481bf0df5bce7935543a2d83beebd5c0372479115. 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/QZHNA2085820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c0254a9889231f1c3ccc3217a80a0056f06ec318ef6146786e3bf235bd7078. 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/QZHNB1911866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad8115ee136066b0d33906ef278ad4c5ecf521a43bd22c896d022c0e2ba0e19. 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/QZES91926931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94363576cfa7569713295827c43fc2caa2b42ba24a4c534ca437b46ea6e0edb6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES51887102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f136241086cc5675ce89d69af798e3d674b5cc072338ae48b07e8c245ca1c2a. 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/NLT2H2300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08feb6888b3623d5bba029c227a8de5fb46552ea59942380870f19695c7e3167. 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/USA2P2201084.
Indie / Pop / Folk Compilation: April 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ca8b389db8b70c7ecfaaac809aeeb934c121cd512c4c10b59f1d294624e3f1. 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/QZFZ72305339.