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 0x3660624ceef0b60917378f4d9a9c950c7ceb836e67ada309ba61059ed86b5ae8. 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/7fdad3dc-b45e-4768-b6fd-fa2bb0f7a2cd.json and https://artists.proofprofile.net/proofs/artist/7fdad3dc-b45e-4768-b6fd-fa2bb0f7a2cd.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 0xe58b885e9dc4a2aa3b4dee712f208b11c4014137a5c439fb1969664194410d15. 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/USDHM1317916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f925466b089e2d8f3fdd71fc4d38412b47c75e5d437dcf8ae803cfb680fdad. 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/USDHM1317917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ddfbb91c511a9a6de0ab4ab052f55271d9e96e204ccd12c92e5c92364fd898. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USDHM1317918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7588c8d54db9fb9d77ee47f15ef9db3b88206cef826183fbc567f7a2962e834. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:51:20Z), 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/USDHM1317922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5190244a349927605e1d3a446a78cd9218739e20529505bccda307f77f496586. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USDHM1317926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cdeea3d8ebddfb4ac3af40906f955a902b291d29f531e905bef8e214c0efd6. 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/QZ5AB1882211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c6841362f9ff12875d3b7ba679d7c43f3dcf574cd3adcce687b88e492e111. 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/QZ5AB1882213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102f9710511a6639ebdd30a18d9445b40c5d4d203cdc188d32b564a81225680. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB1882214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b3f2ecae3a6c0c6f5248c98834c1278182b7a710d093974a8b54a50a32971. 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/QZ5AB1882216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397ba3416d58b62a2fb2c9adedff6495853a5bb456c565919447c4f08c297ae9. 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/QZ5AB1882217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9e7dc4058ef416e09a59d4049b345a8796b03a1ad7cf535b2ff2d6e9c33d2. 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/QZ5AB1882220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df383e2d94d80b6be20480a764f0795a7035e5d26fae2e4ccfebfda25c51b4. 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/QZ5AB1882222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa549d4083a2314a003746ff9a0d230f915e09052d5a367d2b952e06c6e727b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ5AB1882212.
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 0xd6e7005181273cc70c60494130086462412499d883873aa2bf1ed35c4090b5d8. 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/QZ5AB1882215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783c241cc69808995cc9fe2991f31810dd7b5cb9f359f213daed8025ac3bf39. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZ5AB1882218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf098fafe59bf9fc3e0752fe11c12ae01813b61de15a32446efaa030e8c8e30ae. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZ5AB1882219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe39f0485368144084b5dcf0e7d17cc877b23498a7bb4f1e2cb444469b44610d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZ5AB1882221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2eea1aca03515250d633e631197442ae7907377d556df979c2299111feaf36. 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/QZHZ42105072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d1247d842e68b4e904bcf16c284a6bf1ec7dc7c61e0044eb5b847992adc048. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:34Z), 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/QZHZ52141357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b44dda766d0e8ebab9e5400e1f6ba8a7aa28802d4ad7530cff8728e335f85b7. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:08:26Z), 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/QZGLM2348008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b8d045384e5bab503414d4a40b48bed7c9c6e584e6170362aa12429e321ab2. 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/USANG2219525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602671f92aa89fbf5dbdd396080be06f3670225a0c84bd66ffe00a2bf06d30d8. 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/QZGLM2004645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3e7c695ae09046f57f664ddbc2465e78301e312e614fbdc70555240b1c8e2. 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/USDHM1429350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92434df5567f897b3313f7219c99dc73820144c1a49eea1f73f08ef5b5ad13ec. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZTPX2497106.