thumb|200px|right|The grotto of Mas-d'Azil The Arize (; ) is a river of France, a right tributary of the Garonne. It arises at in the massif of Arize, in the Pyrenees, in the department of Ariège. T
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b5102597c5a12171f833be38f5928375d54f0759f09d6ce944fb351408863. 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/5ba077d3-d448-407e-b162-759ed996911c.json and https://artists.proofprofile.net/proofs/artist/5ba077d3-d448-407e-b162-759ed996911c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f89b60478235336bc39ea5923dcfb4f833a681c788fffb0aeeacdcf4f78591. 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/GB2LD2110219.
Over You (Tristan Barraclough & Esipey Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadeac53016326950bfc9d490276cbc8c5a11dab68372f4691d6f4806d5ac14c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZKDK2188821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d15f946df529e87f1166ec1a128a2a7bb5977276256001cdeb76cd9b37b6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZKDK2152132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1646ccc89615b710a5902c6d190da7110603f1806f7deb1fd1fc8a55711c72f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZKDK2161975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc237821e45d0de8021d5f915b1f8baf08cace56ac804b972af03283835bf56e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZKDK2103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713e8e1752e3f45749e7c2bb34b2db1f2f2459f6c52a9935f22e6f7b6826e49. 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/QM42K2192063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dabb51d65939307de34068452488563ec9cdd3d2a3f28a8285c37196908a2a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM42K2150125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b391be9ef6269ea3abb7a2741bc04b13d79634d30ca91016f3d6bfedde1ef0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM42K2102214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01112eed2c8e46abd0e71bab44a80394a01738de50281ce4b7a86dc5667d44. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZKDK2199378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66882360237a1095e3d4dd7189226291524d56bd445f9f340b50dfeb73eb9b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM42K2195018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13626f07edbeeaa51cf5ced546c4103432118822d9940757d0a57849ee3fda9f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZMHM2061720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf822cf28033a68692a05df11b143f3e726ddab588d12b0e7dba2e5247803ef2. 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/GB2LD2010123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287f811f538eeb419dec3f6709392afee2f8b67755045494138cbdeddb478ac. 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/USA2P2009141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46275ab13124ef38e710e5a10a468192947f30337ce291583e3d9a220a642810. 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/GB2LD2210121.