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 0xb779b00e55e8ce70f76d0c4ce21ccd912bdbbdf03e66e433ac81119cad2a533c. 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/b564dccc-ab69-4816-8df9-8bcc57a6e87b.json and https://artists.proofprofile.net/proofs/artist/b564dccc-ab69-4816-8df9-8bcc57a6e87b.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 0x7698e742d60bb747e424de6274c7912f7da8cca45a989ecd4fbefc03011411bc. 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/QZW5K2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd7aac627f767e3c73f02a2668ee1c519fd48bbc3dc9112c71eb5cbfd07f2e. 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/TCAGA2219622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab74226799da6780e8218e0a50295c3c88798f2a32d0c6479494c34e3e1a3478. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZW5K2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d6ee3967a7073cb1dc7eb07eec772b214e463857ec1ea618c16a5eb49e5f8. 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/QZW5K2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d82e210b38b9eb2c2573bab3a59f144d05610a88ac3ff1ee5935aec0c34c0c. 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/QZW5K2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00837000eaa5e17047c0d0374f64cdfbc0f449906b6d6ad87099d0f7d7141a21. 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/TCAGA2219638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79496ed025e669a395fe9e63676c6cb795549b345806b92201a227ee93cf8441. 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/QZW5K2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48027d609df5047e69f43a99da4d250fcc9efd1250dfa1eac9e68a9381be5316. 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/TCAGK2276427.
Hype Songs for the Sensible Millennial, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aad02b9562093d0daf77c76a287d22536f862c010d26d627624ca0d3d6066ae. 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/TCAFS2163660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44d50855842191f4d71f441ad15e9153338c6138cf2add74b68d163e03041df. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAFS2154172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbdf2466eb97b2d8e1fb1723ad010d4bc6b71951d7d9e921c9866953072cfb2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAGH2203123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bb19d5e0c3c2a0942a50be0deebbf9a6222a410b16eef7437657da3b26606f. 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/TCAFT2182014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d38352d13fa00b76bf70dca428a9cbcd2593c56005db2358338e2f139d631c. 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/TCAFX2120385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff02260b9c72444295f80ccfaf2bfd4ce2198550560b3383684ead0a3c139b2. 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/TCAFY2157440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dd7aac627f767e3c73f02a2668ee1c519fd48bbc3dc9112c71eb5cbfd07f2e. 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/TCAGA2219622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00837000eaa5e17047c0d0374f64cdfbc0f449906b6d6ad87099d0f7d7141a21. 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/TCAGA2219638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f24e88b9be449debe943e3bfcf06bafd13fd2f5b6e276e7ccbb9f57fdf001af. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAGB2253259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b92e1ede1d69fac2473dbaf3dfced6f6aea87adb05a75a974083d5f99cad0a. 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/TCAGB2265960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a899018efae030bbca8597c6d4f0db7be571abdaee7c5f98d64ca923ecdf95. 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/TCAGE2240697.