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 0xcefd7713df7324b71ca747c5310ea8e636900ca9a6f10a9bcd7627fc2268c8a4. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4a855f3-c981-447c-9be5-9cb5d982d4b8.json and https://artists.proofprofile.net/proofs/artist/e4a855f3-c981-447c-9be5-9cb5d982d4b8.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 0x19268418194a912e2e502c7136b5ab06ee514d45524537e3545995f9258de3c5. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZMHK2578988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff14944122b338cfa9dcdc3258cbcb744984224daf8eb0c079a1274ea06075eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2594520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c76e664ab332015c1ce9a3db12e867dc5f6bdc15032d42eeb36759e2c01e0. 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/QZHNB2525579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a0ebec47de7752d107060d4aaf6e4fa44b633b8b43514fd43d0c2393434f18. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHNB2523711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3559cb82a0b4243a72137a98cc74ec5044273889d51667bfa3ed76915fdde. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2525582.
I did it myself, my wrists are also opened
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10911b9e5008c8fa2011bc5b9754ae00da26e099a30896a9e2eabd7bd02b079. 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/QZK6F2519307.
This Letter Written In My Blood Just To Show You How Hard I'm Trying
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419a59b8996d680679baeb1cb3227a91d13c6526d2c9aa156bf2a0b03b5c65c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPLS2579351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7b44b6ba6cd4761756e039cdcfa57978279a292f99b608e252a3872ad948a. 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/QZTAU2514879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19a71b45f89634a063aa7f9050eae455ced872e1f7cfabfbbc6cde0f29b6145. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBA2520473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7d3b7d978f64586d9ee960a02a93ee01d0e0d6e34fcaf086b0a0129c82687. 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/QZWFK2500673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa4411ca3902f8af29bf68a424cddfa7a361c58f3fd60b4fd8fe682b6c03bd4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFN2513956.
Your New Boyfriend Looks Like Regret In A Cardigan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f46015dd3ccee93c3a6d80c7284f148f8c06c5bfcb13c5f06b7402c5c71b18e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZZ7M2595489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9e440840d0437986dddb8831580fb1fbf7910bb20223a067a702d3bc86a525. 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/QT3F42564215.