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 0xcc359c7d3961650ff456d15d50441ff50a50a8396523ba775b89e0f922d558bb. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80596e53-d96e-48b7-bbd1-fa2b4f70f01d.json and https://artists.proofprofile.net/proofs/artist/80596e53-d96e-48b7-bbd1-fa2b4f70f01d.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 0x74a87e610e09d9acca17e1d9eea4d86f1220b327ddb3a96fa471993284511309. 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/ZAW381000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ffc9c9274c08154cc7c1794b8fa44628aac8b406b5e702c5f86c49ac99abf2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ZAW381000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e299f2a5c6003d79bfc1bc1c58a5a5d24586de1cf3a80b76ce77f3222a8e5cc. 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/ZAE851600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc562158354b43851ddbc977c6426f7881ce9656e55cf385b761a5a0483fd9f99. 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/ZAE851600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8946e8a3df44e61b2284b485ea0f6715c408c31122a0526f1d892663dec9e546. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ZAE851600049.
There's Nothing That Love Can't Overcome
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e76004f091a3d4e8db4db2672eb7686510859a5e1c106ae2acd46b92fd1db0. 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/ZAE851600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c93355695981e15b255c0c2ae3345df0817f1f9d0fddcc33b16f97569e4203. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ZAE851600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0f7d7d565582b3eb173a56cf7254beec77c7062d43f06aa9dde6ac27d7ea73. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ZAF851600000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935ed99372e6a3763ef28a8bb38849fe973846d199745b88dd3dcb784b6c0f90. 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/ZAF851600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b895a2e6ad0d1e83a6112a2866813c9ff9c38309d424cb60dd8154d3cd759e2. 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/ZAF851600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2ccbad1c64a4761a2f04533174f3b8e81abd93e3779f08acacf9e3a5a29dda. 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/ZAF851600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21803fc5a128812af0c0dfa0c5f6756fabd15b91b9d779370244101e5c9870. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ZAF851600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe050fcb0ca5c43df97cf98121ed46b67c2a95ef7000cd31d65091eedfff35d2. 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/ZAF851600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763cd321c8992208801a4a3a27e386bbb79bfb3a7eaaa22c78a172ddcb7bded. 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/ZAF851600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3ac3109f5fc1abaff57304f92affd11b47aff3eed10bc570c993b18f353e0. 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/ZAF851600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b004f041efea7bc1381165cebe82fbce6198b585262c8fe0295e7dc384ba7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ZAF851600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53a1d95c022e65e52c6f9e529d0f4c7200fd987c88714da0cefd5031bdc603c. 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/ZAF851600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b8951ad2659a22b7dfba1a3bcf48bf7e8382add59992aa23ef56d1db580fa0. 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/ZAF851600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078535888be34074f7b6584635482796812e5cfe616389428d56c6c5c1ac7f24. 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/ZAE851600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0cd800f5ad0e435ff4517ba69372b4e1e191baff5a8302b2892760bc7c489. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ZAE851600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af258a6d4066a85c1805f7b0747d33a079851b669eb59bef80da9f11723519. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAE851600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d7197db51021558c5083bef4a5daf5c03cdcb287d2a1fad10c106a1f3f857. 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/ZAE851600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b27593d7b155c22959344d8403b314f56d76df652392ec725a758d8832162e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ZAE851600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd80cd00264a57a93626446f9e93e461a482ba27c5cff14262debd7e6152983. 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/ZAE851600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000937e26f2d5c6f68fc8031f26ca033785578f0ddbfa84cd7d5d40f3bce3f07. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZAE851600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a9fc2ed1683a31f9e7d4e5794be953e7c72f82a6929328b9f0a2ea818ad6f6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAE851600030.