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 0x1e8ef3c0ec7f49983b1685d6ce7e396c00601da2d16ed4bf53976daaf330a418. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8cea7b1-11e2-4198-b471-15afc49fd092.json and https://artists.proofprofile.net/proofs/artist/d8cea7b1-11e2-4198-b471-15afc49fd092.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 0x97cf646fcc6d02802693a02a86dfffc3b634d0306ea60b28fd90b0b0549740a5. 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/QMBZ92177972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a18d4bcd6ac5604b815bc7c6cd05de9b1ff4f8f62f32786d4fa3ad79137409. 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/QMBZ92177975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d7d93efce9f9d314328a7e2e41965ac6c79e92a557582f296a251d612a309f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:06Z), 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/QMBZ92177974.
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 0xd6f11abc103fe2fadfbf64db42fa64aea589254f0c69d306daf7164288fb2b1b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMBZ92177973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4fa6875b3792531208ef455f382aef559e5d4e27d99e55c25d77e27629a88. 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/QMBZ92177976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd041e203753af345db57bacf96f59d22627af02d7e55c95ccc7a86fde3fe1293. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ92177977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045d0fad91c8fbb2c94871bb2c3e5f784a392762fa16d968f0fcdf385ac9484c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMBZ92177978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2fb1eb1b1733abfa2e28b4535de7a89b3f105c6dc57ec64f376bb005a95bee. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMBZ92177979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3e008375a1aa55df1e7f8bd99874770f6c8c145db2fedad7af1e2604896bb0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMBZ92177980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566627480132713252d5f33d3be8d48d57a89f02227a3b728fd6cfc26e499de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ92177981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87cc694a65c7ea563e242425ce82d6dedd53a9635a728c89c7b1ab184eb42f. 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/QM6P41906699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3509edcff7f59fe7755d501c5891949bd6cf27608c54f3fee3c95998bcbb5bfd. 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/QM4TX1964437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc140ec7c98fcb1b6016ebfb76b44506a82714835e5d7165c763bd2452e91be34. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM4TW2030061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ee7878d7fba73df85a5318bc8a379162bf3f892b993923d1395695591903f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM91401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f77a75779939f08a395fb76a3a7504f34211954e47e980c78b5d346c197660. 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/QM6N22496139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb61b8341dfc53fcd7ede6ab876c7d6854d9ae491d9bb9d224ef9397a72537. 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/QM6N22347823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa54588fc07dc35e29aebfb67758f690b427cbf94b05ae03ec07653f6db8cb6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6N22347824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ca17383ce087b437cf041d61e393b5507c57f422e194f3c82dc990f94f00e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6N22347826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb37dbb8785ab02184afe452e949889025850a0b814d4dbc5eca553b0fb1c19. 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/QM6N22347828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40769eef01547b5ed5783aeb4272f59e5abe508748a9ce530ddfa833c1448c7a. 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/QMDA72227420.