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 0x27a17c3375e339b4229cd9490cfe3749e83d4499022377b4b01fbd71701a36a6. 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/b6f48d2c-7c3b-4f27-96c9-87ee707fa60e.json and https://artists.proofprofile.net/proofs/artist/b6f48d2c-7c3b-4f27-96c9-87ee707fa60e.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 0x219b4c91f41fcbc579c858e93dc701d29bdf396175c70fe3c8f926fe735ae9f9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXD782302131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1942f5ae60aa2a39e2e61ae6235c334af0e28888ed3de81d5fd97a1aed4ba3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/MXD782302134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960e819647e5a19eb712d7f9387e1a9cc051d0d18081610d56af5c706a9e7b5e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/MXD782302135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded5c33fccbe7430e8ca09cbc5d2fd77306744608bf8c8a3b1d9c4a9ed3ef6e7. 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/MXD782302136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08968e6c0343fa29d1bbd62bda8a4a5c8eb4b4e8401dd759d2d3749032d6c9. 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/MXD782302138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76cfde04d12bfa0812b1d25a6a467272208310d6c94af7e79a50c0ccc86c9c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXD782302137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b91cfa1a398bb4190bb541616b91aac25c30510ff127312a2cc5d92cf4049d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/MXD782302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757bee093169f1f4ad13d495ab9a704deb11e34b5752085873ab6643c3881a82. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/MXD782302139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e6373c36e0e26ac02fe4b96bc1c4249c742d39d996b6ab2b4e4caf1639c98f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE6I32413399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369219fed7a5e1134508a3720c871c7f85423790ba9b160e9ac83595eeada76f. 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/SE6I32413400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bcea11c7fdc91b58633fc2867d11e0c6aa712889ae36d42f02c303697bcb2c. 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/SE6I32413401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92df8d5a99eac4789bb666d389baab12a8e9cd85427cdb3fd5c4e76618a181c. 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/SE6I32413402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258c793c46409e6afc55b1a60894f8d2cfb9e9f5e1073127912230bec4ed4d47. 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/SE6I32413403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20896076667767c7931453713ea2668683b381398bbc55107b6106f2b053bdec. 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/SE6I32413404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa322c7865c14ee81652fd883778a9053fe7fe82bba23ff1901cbd06c1a7a7da9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE6I32413405.