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 0xa6aeb71d84d8d4531e4c6624d506806939abca8ec11e095adfa7f36e2ef3b9b4. 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/a135213a-7a5c-42fd-894b-31cf1750738d.json and https://artists.proofprofile.net/proofs/artist/a135213a-7a5c-42fd-894b-31cf1750738d.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 0xb8afea5c46edaea691217a0d4019039a87ea07716caf4bd58b0d5b476a641b85. 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/TLREW2222723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7a0736145ada7f2ad9f918053675f332b005e17386103be2310e426be3b6b. 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/QM24S2305052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d05c351f4696f1c8765e91ce98ad2c4d023da32ca8ab3e5b45d95e80fd64cb. 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/QZHN72155475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab2595089a2b93c487416268598a78a6d595fd308ffc0c8f1fc6d29b1cabc31. 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/QZK6M2160290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7b0cf4078e52960bebc9345e0931a3450380dee9df93e0e2fc3151d9703880. 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/QZK6K2153852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21866b489c7fcee0b8969016bf6cf80c91db7ee26afdf9d5fb45f33be1ece7c4. 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/QZ22B3004756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbebad745b0a0b871d23cc16cb319cfb0c7a603ab992f6ace46701b60fa80539. 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/QMEU31615639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3490719651ee1aeb894131f8d700672ac9ed5d68969f9a82dd55ec5fbe8e0. 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/QMEU31615640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7c685778d4b6d4d3e1caa90bc943289353383545d8a97f444fe3c265140c21. 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/QMEU31615643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf47f3690e6f69e6bfec07c190573b56b308b872e37ec010fefa90b20a0632c. 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/QMEU31615648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa950d3d0a1264966b0dedbe175e8b2887fbf842f04c8e6a78f00583d485cdb0f. 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/FRIDO2211919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e53e7bbbc979da7b0bda00394339203565160d4eaea45c57dc04c11e4bff7. 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/QZ5FN2285530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b5fbbcce8722958a2f10514c0354f098687147ed016212c3611f25958cc35. 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/QZDA82226404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae29b9675d515970eb9fbc25496a1291e7de2658b2b37360bda80acec9105d. 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/QZMER2062591.
It Ain't Easy, It Ain't Easy (feat. Nyck Caution, Kirk Knight, CJ Fly & AKTHESAVIOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b8d2e0eaacd5cac7b1685a7cc3b131818378bba28bd610181b8ceca5158d3. 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/USSM11903525.
Puke (feat. Nyck Caution, Erick The Architect, Meechy Darko & AKTHESAVIOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d73e3e3c1d094b32de20bddc0f782f5ab99f178f3627cc4d361632a0a39d9d. 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/USSM11903529.
Last Choir (feat. Meechy Darko, Kirk Knight, Erick The Architect, Nyck Caution & AKTHESAVIOR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ecbc3af168ff31c6a3445f7478681d7128920ec2a3d2567655864b0d90295e. 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/USSM11903526.