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 0x892c8da454d24b4d9a282c1d2e131cddf3b70164ea019042f75a2fe022cc3ad2. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d75b5d92-1ae3-4696-a2bb-05aa6cc830f0.json and https://artists.proofprofile.net/proofs/artist/d75b5d92-1ae3-4696-a2bb-05aa6cc830f0.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 0xb9019433eb71446a7ed3c7246c43524e35eacf78bdfe261c0ef931a00a835728. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5XG2415701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079aafe1b742b59e285508c8f118df1b91ecf61f5f3d75e49947e603b5746a6b. 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/SE5XG2419841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8d368614983a15278854a3eff5751fb4d08c486caa603ff38ed5b4547163f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SE5XG2419840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bba645d8fe393fa344e26ffe131930f7c2fe36cd6d1bc2e9331b25e24387312. 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/SE7OL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41f800445f92e80b16061cc26be796c153435b30b7ebef115fc8eddee34f262. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SE7OL2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624121e57ceb9d4faa56f8fdbacbf7415c0417d321940f2f365661b0c9ee7e3f. 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/SE7OL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee941ce7b4d88919c3943a19dad1a87cf9195a22fdc6db48e1460171cb64d119. 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/SE7OL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c281fb519bc58eb98424ed738a51f57588f0f94498a10ca98bdd9f816dd490. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE7OL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff13097a4f5ee6af7b5f18cb0e07e2f9aa6fafe4414778d913fce80fc272ad0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SE7OL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cee4d70b8e88f1d43c613df77a24051b3c08a2b3eefd7421bf88b49f8108e65. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:51:56Z), 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/SE7OL2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c281fb519bc58eb98424ed738a51f57588f0f94498a10ca98bdd9f816dd490. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE7OL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8084814c208c3c47d87915393d81605ef737096755c95d7fdd846dc00e601db. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE7OL2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff13097a4f5ee6af7b5f18cb0e07e2f9aa6fafe4414778d913fce80fc272ad0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE7OL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59037714ea5d9d124bb0ad4e7b8edbfcaffa8e7c4ceb1eff91632221318343. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:02Z), 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/SE7OL2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f5b10b6efd0260f9af5eb468d1ad86815ed6fdc61c46c3cea5c29c5502c89. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:02Z), 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/SE7OL2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c592766f66377063ffb9a49f645930d1e282b32f2cb581022b0ecf27a3fd137. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE7OL2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292dc0690ffcac82091cc7bc29d25a137171c675ebdaa3841ff83086eaeae320. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE7OL2500029.