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 0x9839dd52a232970d575c6c8eb919ccc87da3a200b404ec902778c24d607e19d2. 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/ad660297-1414-4cba-9a7b-cc19df5a79db.json and https://artists.proofprofile.net/proofs/artist/ad660297-1414-4cba-9a7b-cc19df5a79db.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 0x7bb3d688da07e509b5d961f9b2b3bf4a070a5bdc32f669a136941f436a40ec39. 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/FR2X41827350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4afa3c2f8abbfc17fb38dd2af570b71f6b2dd1b2cd39ee72f2c453696a30607. 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/FR2X41827353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3902f3b8cbd6d380dfec4730969d1eeb2f7147379058a2a637dd773cdf844c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INM231700331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02323880a53cbb5a020f73e778a717071775c5c7fc21be3db8d7b4ec82bac21. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/INM231700332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905a8f4a7f08e84fbf217cf77cbd33e5929564304df10fc63992aa02ba33af13. 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/INM231700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6bf6fa9b441c7265c344bda1d2a81d7eba5acb66be60b008d6f7f222c25ef7. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/INM231700334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdf1bf182aad43106a9e50603d552d37cf99b8e4890e042c411179a6bdf8a8f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INM231700336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde509e0411bb5b60742a545157ebbba8da7160ac5ee3e1f0b385b7416608f1aa. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/INA331900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a509658afe8e3262f9c9aa8a1001f42ad4b365b509474b88c06c255798aff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/INA331500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961763a49c2b67dda8bf9c9a8c5b9d2c9118208547b3292aebadc5c49215bb1d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/INA331500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274cb785d48a4ce19ddac3c844784109bb0c2851c0eec035d788bb6b1e972191. 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/INA331500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98d77623a17d2e81217d55d803d2351cc93a7c85fcd5a5ce148ab7464089c7. 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/INA331500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e64a5995fca8f09c44eb9662f0964c724e3ac9876f380392fa085aba4ca9b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INA331400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475968edc1b2f20959b0e5651b6711f277c13141d2d332cb5f2871af75db1ee9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/INA331400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d31677dc4d0878668f21218b5a7172dea7520ecd5e955dd10cee6446b5c7d6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/INA331400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bcc9d1e88ecd024b0cdaabfb3277a39bdb13d3a2f2c9e5e694ea86493db505. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/INA331400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981e2b7536659d4af76b571bd028ef93770be1c107f450e12491a557768ad5d. 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/INA331400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b07da5dd4889f547336e33aeb952076c098d5046a9f61557c84797a1ff8318d. 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/INA331400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5688eb824285373f87aeba687355d0f83a36cbc629e310da1a4c79e4768eaf2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INA331000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe599296cf6a2dedbe26aaac165754912f31365cc9fc113955da0d44fb8b27b4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/INA331000254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b2f355e4fb20d3d34c2a15780be93c8d8ad075fecf4212490d42f035bed84. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INA331000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb745b82a44e8d9cfca8d3a62701106c8b5ff72c6bf8d73a6860aaa04d2683a02. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/INT1S2300125.