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 0xf8762705bfd7ef12cc75b5e1b17c38750ad060a7fd33800d91747a4f3c6a617a. 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/f4dc8ce8-b796-44a1-abe6-ada891e8c1f9.json and https://artists.proofprofile.net/proofs/artist/f4dc8ce8-b796-44a1-abe6-ada891e8c1f9.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 0x0b99db6dd10e00fbc3f7a658184393e0ec673b356dc04982bd3884a9d180b5b3. 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/USLD91737246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aef58d8f1f82cb199d122f8ec921105195b4fa32ac2c26b52843b096f198029. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USLD91737247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0293651ce6020c818712be1ec242d8d068b7e8b4551e72067c8a69c82465cc5e. 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/USLD91737206.
Ratatatattle (feat. Blu, Lord Apex & Kota the Friend)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a21d0bcfae3c6301d3182e4d4b4e4f83cad452ea0aec25bc5ea8d64d2290aa. 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/USLD91737248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cda92f58f386a7cbc713ad45c9bf04c8313f0d51b864d26c300d2382c00e57. 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/USLD91737249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e735c85e891dbc19114f2860d339227ae4615788a41a03c70d7f84c0f0a4af7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USLD91737007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa399487f86441a7ac3973a639e7abb0ed8b2b7be4293f24857cccb08ac78fa5a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USLD91737250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bc75bc5127c31a5fee4528992e8d55fb2e8a6e82183d0805055a26d2eed423. 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/QZTAS2288697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0ee7488e814b7d60256e56e8cf763d9adc71624591f0412aa4588e4ccb81b. 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/QZTAS2288698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a66539ddadc8daa6abc227441e8095ab5927a0f8cd9858088a7e6787f952c86. 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/QZTAS2288699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ecb941aeb8cefc4cfc42f1808a07386dcf937116895651ac1fe18abadb9566. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTAS2288700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4582707f91cc0055c10cb894da3f0c7c4a942ff21351e8f6328cf60c4114c7. 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/QZTAS2288701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670c8eb2bd834210615a23cbc920435e97b279ac66a1a2b1ff1f841b1260054. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTAS2288702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3414c3414f0e8a0e66cbdaf03e9e2d35936e60b8b710603f4a6d47d5b99ac6a5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTAS2288703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213d5a131e220ff0c06eeebb78e95ba9b2b2b4358f9759702b334ee89c33e108. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAS2288704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e47b92a2744d58e774951e28c137843b6ebe98dabd952320ab624f35815769. 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/QZTAS2288705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca3b77fd0dec41ef2f95e015ed5200f2d1e457d99a730adec0fc16c5a41698a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTAS2288706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0293651ce6020c818712be1ec242d8d068b7e8b4551e72067c8a69c82465cc5e. 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/USLD91737206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e735c85e891dbc19114f2860d339227ae4615788a41a03c70d7f84c0f0a4af7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USLD91737007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9503746ef6394e3b32de2cb43557b42d91bcceb4fb2db3b874d23be07b8d984a. 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/QM24S2400105.