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 0x13f59e888351fa1cdfa6911d0773dbd7ce65e7bc9b01ae39db642d282ae5130e. 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/d643ba4c-ae11-41fb-b2fd-c2bb03dcdc0c.json and https://artists.proofprofile.net/proofs/artist/d643ba4c-ae11-41fb-b2fd-c2bb03dcdc0c.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 0x40f29196f6d6c2c074d70ee068eab83cbc8c6cdeaa58c621e5d75120410f10e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAC012300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce34e2c88efec8529a3cf5e981743647f6115ee21172e6091bbd6bcb049a313. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZBUKK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88263721f33b275b399791103148be9d0213470551ad5691df88e61e2565b629. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZBUKK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f2213611961f318f33ec80d0164a2b3598df1727a804a9bdcb621c5626a797. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWDW2490175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3d392bae2d463ac6007473bcf8f5921e7b55d1e05946d42ca7897c88a46875. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDW2490177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67330674e6a5c3dcf134cb08281f98e048c2126f1aa030d7ee86f2fa5dc44997. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:20Z), 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/QZWDW2490176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3e5977cb028f30537fbbb6765fdb749081c3d13ecb08046ec3ded17ce4429e. 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/ZAA012400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c570e0bd946a9fac89ff20f8890165b6a1a808350a4fd67f966345a1d98978. 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/ZBU4P2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb272e1818b8626c4ad11c377d7c40f81b462de4ad6b4ab8b9e5db328b6a3f. 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/ZBU4P2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3434ad093bff964434bccb147d982bc32c197e41eb45c8f58cd15f0ba5f2d200. 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/ZBU4P2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff4c601a8be8eac2e9e095d3259cf3935b66b668ab278d33d20907afb4539d. 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/ZBU4P2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ccb7da8c2f61efa253e3da5dd84aafaa9f4d9fe265745b39c397147be1355. 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/ZBU4P2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c8584b74dcdff9f2e8ead8056bdfc7013aaedaea31bb2376266c301c6a99. 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/QZWFR2328610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb606455d187f84bc4167b3cd045bbaf218b7a08dfabc0a59e003ea2506fa2dc9. 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/ZAC012301481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c6b2ab8df0cbe73a5c519e78113439956fb396e5e4c84b38618bb0e5984a8e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZWDW2471475.
Yakho (feat. Jandas, Mema_Percent, Leerosoul, Mksoul & Shoesmeister)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a60c316cc6cd899ad1b54538a0f4544fdf1d92cda56ece038e1266c62ab1e. 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/ZAA012300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf97c4d7236feaae3d88d91109e13b02a9c6fb7e3ba0038337a388a11ad2e826. 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/QMBZ92414603.
Zenzile (feat. Leerosoul, Thatohatsi & Jandas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bf2a88cd170d2de8f1297430faa1701b05f58728a97104aaae7e4bd10a236c. 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/ZAA012400272.