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 0x7260ddf9f964a6601e681b55e81744851b39628bc9e6149a8512f5ab3116cada. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa818632-14f5-4495-8472-d394169d1e93.json and https://artists.proofprofile.net/proofs/artist/fa818632-14f5-4495-8472-d394169d1e93.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 0xe1eaa84aa8b2fb4bcff2d1917f323014a4b122b55b9ba430cde5d3dcee2b9473. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2315356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e649a2687358a267346d177ec24cbe7847e8108c4fa712e38887c2927f8f26c. 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/CA5KR2315357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c3897fccafbd81816de276ab0817c175f3593682c885e69c9b89aeff7fdab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2315358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3300bd28022bbdc3381cdc3afe108516780277fae528a39d96ede5ff27348f. 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/CA5KR2315359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435e9a4a9a07275514e5d0fc76e5140c11460392986adcefb2c87b5c4c8be89. 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/CA5KR2315360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4eb30b6a5563b33a3b6ce71f056c0d9de43303251898842950bfdbcad5ff29. 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/CA5KR2315361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfb881a567848960b3f187c691ab4352557d5bc1e498ef8fc888b3f1a2da272. 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/CA5KR2315362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b05649f46d10dd8219c445c4886e1161dfc4ea81df0f805583b80def8758fe6. 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/CA5KR2315363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f60d4999420ef38fba971cff6003dc79167b5172b66a2ee47a580e5d09c60. 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/CA5KR2315364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8ed0875dc3af18474301ee2c52cdfdc3e128fc464011f98c6d88aa00bc11e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2315365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24412462d2e2121350f3fa43dbd0277abf254e804fb2f7e9eea271b49ad902d. 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/CA5KR2315366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669a3281171443956be86679b4ffb4027c4c259c5694c402356fa6a6dc17bc91. 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/CA5KR2315367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129788d93a87ecd858ad3e0fae6e9b49b925e81a2c31d30d8c7e9b9e5a5cfd4. 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/CA5KR2315368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2a9ee2a82aa2ae6d109ac646964a915c9dee07fc552120b822c357bf5ea44. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2315369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629175cd9308c120f3b36162cbf4493054f5d453eb4e9d318258415948d6454. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2454500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f8244aaf8936a8d7f329208ca2230b4abf86bce2d8e750c6ee6fd59c40a30a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2454501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cc7d4ca91a75ab520fc85463fc831b528113244fc707d14263f3c2fbc83b6. 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/CA5KR2454502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e347dd5a534dcea240a4e8c014278324479bc20e6d07d738d3a2b54baeaa0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2454504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce98f143f7231e8f502064837616535fdd6b979044a85312a2d44837528b1c5. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CA5KR2454503.
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 0x06873386e433de7e2f0890db561b87c168a694d57ae0aa82638634a22f8c6825. 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/CA5KR2440319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721251b12c5bce9f63660f186282a13ef41231afda3d8b195804fbea9fd26a85. 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/CA5KR2440320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd4f87dfccb37a60122401d47a65c245ebc3d63be5bbb75e343b3124dd2b58a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2440322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0598744edb09ba43f9f2832f0602b1ccbc43700f6cea736ccb451fbf994334. 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/CA5KR2440323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9b930f75d0870f0f46aa11a0728fb2dcc4a3b345650aff032bea89e1bf3b11. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CA5KR2440324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401510c9ebf6ade204021d271479e83ee2449ca34cb96fbfe64dc328064cc70e. 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/QZJL41900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73364749fcaa209ad206f882957e532c08763d36e702f31e580b248a57ba56d0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR2316605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6d235745604e3d6646cfb937fef0f8239336b751ebb252900f3a5d4576005e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:52:07Z), 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/CA5KR2316606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b56d8c227d0ede0691f169bbf5010bb8a514ead55c56c6e18e4b03fdc056c0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA5KR2316609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3815af79e9b34604fb0decaf4d5c170b4b6a166b93f64961fb099967445003. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA5KR2316607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87afed0e77a30401780c0f778f21c68c0804353884bb36c906ad72af6a522561. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CA5KR2316608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8224240750899f291ef6fe97bdcd16dbf8ed177a34b7008e03a3e8b05128992b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CA5KR2316610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8542cbb478af2e204067ef5c0b67878163d951e97e41588f0406df77e5dbe5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR2316611.