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 0x49c7c604de298f4e613018dbba306253116945d23783fd5ea4efc4cd0d391c10. 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/2dfcd62a-d37d-4146-b330-73f80ec39e7a.json and https://artists.proofprofile.net/proofs/artist/2dfcd62a-d37d-4146-b330-73f80ec39e7a.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 0xd198113239d7f30c21f99226ae2bf343d4e362a449524d87f091ae3a43eaa2fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFG2031421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06788a101fdb53f93dea12a46e21b98ac2846b7663cac95e7af4dde1593c8db7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFL2121052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343189bf6ad98b1c67680f775f52fa09bd6cf9d99c76d353c271b82f5950a071. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFM2187629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf958cf93167bd01569451ab21ab28c8208dba612a68ceb3a66d747f01f5605fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFQ2131547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d129a82e019732dfa2005c619ff643526f765cb3e532c09bf8b73d0db4e83d9. 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/QMEU32206099.
Didn't Even Date (feat. Roman Alexander)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac729f8a603fc74f5d2080b749b4824239340498fb5a79c8ce84849dba37f881. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEU32206102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf044ee149d8fec31f96f322495bc025fbb14ebadf50d06e884a566832d48c52. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QMEU32206097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d129a82e019732dfa2005c619ff643526f765cb3e532c09bf8b73d0db4e83d9. 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/QMEU32206099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0a5b9cad839a009a0688452563959749efcbb0f50a2fde07ca26d348172ff2. 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/QMEU32206098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afa36460e8e1eb801f455db2aed2268e5d22da950156f050c76f5f861c6b007. 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/QMEU32206100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d357b21b843bb01c887e36d5a91879712b30ff58b81067340091143137dc535. 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/QMEU32206101.
Younger Version of Myself (feat. Abby Anderson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8e94fefe629ad49e0fbff5fc865c55c40914d4e0a823c7ce5076645c1c4e0. 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/QM24S2204563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac729f8a603fc74f5d2080b749b4824239340498fb5a79c8ce84849dba37f881. 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/QMEU32206102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95bbb9b12b87f314c7f852b0fe494db6d6ca59d9b804981506379b2e3e925c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHK2334114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4857edad15d0ec49e106b85f5caafbb82be72fbeee66c0045b4966073b644. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWV32445177.
Trace of You / Halloween on Christmas Eve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f392a1171d21c3e8e679d18c7e2ef0b4dee152198396f20b0772546ac861e5b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ8A2419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16a2301b1562bbb81d87e65339ecaf2adf21e9f89cadca47dc7c0a36d75225. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZZEB2454893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f392a1171d21c3e8e679d18c7e2ef0b4dee152198396f20b0772546ac861e5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ8A2419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b4abc6e23281b4d74cb394296af503596b4c981e8566bf964b14a0adef0408. 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/QZ5FN2549216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4fafb7c920d8149e23414c4effdf8d79affe973a174f8657eed41a57bdf64. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6N22333451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107f5490d218952676d1c739259f55ffe1d7ad299d83f0fa7a6b9ea593ec941. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKPL2170525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870a4730d34929af408fb01d72764746153bc2c93d01bacbb1a6ee82df243dfe. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBKPL2144723.