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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4540c0287629214f0dbab76a9b526cd8c8858c368b411c20a95d4ba7a83e82d0. 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/9f6769b9-7d9d-49a4-a50a-99817879ed39.json and https://artists.proofprofile.net/proofs/artist/9f6769b9-7d9d-49a4-a50a-99817879ed39.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5509e7c9798e18637edd16ce094c11ac80ba06da63244afe9bb90ed6b4dbe7. 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/QM9BV2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd083f2cac3df00f0b79c7ada8b11101ae618c2ad6ab20c79ef80a1ce7ba5ad4a. 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/QM9BV2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9ebfee54275e9f74053e9a0339150e3bbe292afb4337282ae0061562e0f682. 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/QM9BV2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f5102e5b8b1d18ee77f212f12df9795055489570fdc711caca15571adbbdd7. 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/QM9BV2300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb183a7fd01fa77a6d02c4cd51877a0be14cf2295911134bacfd825a2843db4b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM9BV2300074.
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 0x3f463ac9cc7f7d2c717badf012e8c6cf01a85bd6e363349a09702e24ba530041. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM9BV2300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf65119cb6ad5bdf51e822f2dac94ead64615d3eeba5bed328ec4c3471d9bcb. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QM9BV2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8942f06789c4779daa2f945de70c107813a256ef2a8832c56c999926eccbb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM9BV2300086.
A Day At the Farm With Farmer Jason (Bumper Crop Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9344c89dc634b59a51fdef75c3c285b4cfc1051f5200049437b61fc0e534f0. 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/QM9BV1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef15efc6d9aa2191c80bdde7f512a920484fd0148fd3db9545493fc62f5071e8. 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/QM9BV1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a338310340eab9de98c1020e1a09fd1e04b70af0cbf85685422f58ae14280c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM9BV1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3ee863b1b6dcdea20a1d97878ddf677319454154a8bf488bb21d8d0a847cc. 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/QM9BV1400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf8501d2b83df6ef62aa3a9eeeb23f3a279f9bb716321bd20101e760821d2c. 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/QM9BV1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd6bdaa0643e39e8f16ebf4e935683663527c8a4de3b903148d58c68c9f64b. 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/QM9BV1400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650aa8d14ba00ff086c541a78b3b7aabf9bfcd54259e91d058f55594ab558bb. 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/QM9BV1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3d4a6253a34000eae2c981df9af5249996e2db704f4102ffb5da8850bad88. 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/QM9BV1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7d361b7482e71cfdffed5b7dd64858cef64faef88027dffa74a3cc0b4bc30. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM9BV1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8020e117cdf236970afa3b6cadd197ea09c9bd2a1c6f07995b2697628ba9dfa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QM9BV1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8a97ab3890f0beea0d3217739c789ea81e6d090c44234bc9c73e9aef8a354e. 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/QM9BV1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c883df5355b79068ec29377cbe5f7db76388f02a66829d02441f04bbf8f9de. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM9BV1400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43d3e0e84be7731421813ab827be009698ab7f00811a6b1d8dc17d049d2dfc6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM9BV1400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7be9955dc4cd409969e56b089ce47c9da2e3feeb1a7aec1dfc94cb5efec7b6b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM9BV1400030.