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 0xcc34342c9770bff7fa580be96a5fe41143334cd58c2369669daf7886094fc6b9. 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/d9109a78-6d0d-433e-8638-c5f4ffa30527.json and https://artists.proofprofile.net/proofs/artist/d9109a78-6d0d-433e-8638-c5f4ffa30527.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 0x8141f012c40eb500ef885da3acca06b9db3b781346d21e5c9030bd9bb2a52a05. 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/QZTAW2301874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73303f9a75719a68f2260d9de3b9dd86819d2000ec9001b5d0f72fc1c69a5bd. 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/QZDA52497072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261991efcb808b1fd4937fd6abb35b84928df834d61a6381c8a128518420f3c9. 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/USLD91756340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb4238a2448d84c79ebb67cd1f94f1495a441b21c6dfd3b5738575975b0ae29. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:24Z), 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/USLD91758191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cedc49a4c3fcd7ff002a0ce4dd0f58da47962e398fc262d1328aeaf742068fb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:06:31Z), 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/USLD91758192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fec353cbbd4f2efb64e8ddb3150d8f7b91c6031d66746405928cea8d98329. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91758193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24d102b4d74318e7d566b3f934d151b8ecd230a9a2b4b9b282af8888c5f46d8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:28Z), 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/USLD91758194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa156d18f137458d759b7db8c498db952783869b1084c4d154d37ae0d3cd266f6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USLD91758195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3071069d270fdf5c399ce8d33f3253ce900a5eef19f9b3f2241e6175c65322. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USLD91758196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ae1ddd44828b67c844eef12ee35b7ce2180fe57004bcd6e7b26c8bc9e311d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:08Z), 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/USLD91758197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd70372d8779fd9a51877fb91cc92135ec243b614c51873f228b11cc332d61b. 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/USLD91758198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bbca76426eebfc9fe6c36258edad596d39a73b7663b3542933078838caab2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLD91770358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0090b97ad82b10b993db02aa2338b26de084e6b838ce18296a5599ce2d811348. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USLD91770360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b241417d5f8194ec7dcffc6b42efb23d0059f09f8607093dc55a56d0a0debf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91770365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4cd856d85d578172d738aea29ef182207f782d29d591ac5720e27be34fd31d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLD91776283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c84b8b540abfe2d5477adf027706bfc497497e545d4b2815dadf8dd65af951b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USLD91778216.