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 0x56b3904aaf83b692e4a295c8963576bacb3eee205fb11b9ef9e670affcde7c8d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46fc0d2c-3d12-472a-a5f8-c50053f6b3b5.json and https://artists.proofprofile.net/proofs/artist/46fc0d2c-3d12-472a-a5f8-c50053f6b3b5.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 0xb25f18cfddf239c481dd8029241235aa832af08d03e0e52fc408892408c887b7. 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/DEHK92103081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5d29dffa0e8d1137a056db791972aede17dbb6665c78e8df7e2191ff0974c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEHK92103961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2045c32c279d88d22afa552eaf82fa48fa16d1fcadb1b509a6e930cebcebcb. 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/DEHK92104161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ece6d3aaf215fde5d3098d0d06e22c7c186c6213073374470dcf14250b9320. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEHK92105021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c9bd5d417a9bbb56cc9b348daaf78747317d6156817c972504f104f1c016d7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BEB682200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ada67eece94f0431e6a6bd8581f31adfe58ed75ecf9159bfd0a4c401011ce. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:49:32Z), 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/BEB682200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5bacaa82db846515c9c537af0c662fae80343640b64082527ea4a2a1f2908b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BEB682300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe81fffdd5f0ea5fd9aab846d2e9c9140486b7ec42c668d5160c4447626112. 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/BEB682300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0e2ca4859353297a64a1426d66955561383069335bc57e09133932e293440b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BEB682300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f32d3b6ee832d1170c22309ace71cecab5e607a914b4073e2923f5ebf0def8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/BEB682300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543129428e5cf2e86016f7faff1c26661ebe6c87aa17672b611c2ee117d31a46. 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/BEB682300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ce58d6b5102f3d5000c361d79abd2370cbfbdada1439e36b255d531f75c1e. 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/BEB682300524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec4077266e96b716113de60ed3712afda4e082d3e16555da50aa2b15f481266. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBKQU2402628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a9494543435dc2228b90f3b83058169305a8273dfb212da3ad2c6b074f33c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BEB682400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7539fdce0d8feba9c5b023f48c3a973b0aefaf9ce5bd9431729237c2f8ce4c. 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/NL4VT2100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e3e6a3650f8b53b12e181ce7b991757d30cf629b90ebf251bb2693cd9e52c4. 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/NL4VT2100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba287ddf4ca17fc8ebb8d7c4929650a88fb399f7488bd5c83eda0022234804b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLH8M2400240.