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 0xb75537f464e4cd7379b311e75638558466559af1a1f702139773434a8fe1ca8c. 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/f10b0f12-722a-4b0f-842b-4e7692a86f21.json and https://artists.proofprofile.net/proofs/artist/f10b0f12-722a-4b0f-842b-4e7692a86f21.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 0x26368d795cea41166e34eb2f94c4b7d31bc405b9874d970da6c6fa8c083414fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USV351431157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfedd5478f8fe7a1b6a815c379c7adb12a05c430ebd22558b041e36616396c3. 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/USV351431158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9dfc2faf5e3ed515bc57764daa6539f221739b973da712757470070a95e0e4. 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/USV351431159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff33ed89a05460b428267477c713c6a03f6672f9812b43f2f2a5e2e25baef96. 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/USV351431160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fb801434930e3992c53571e6e2bbb5c71b424c330d40bb2de5654a2677032c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USV351431161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f3e165ffa36daa69f7b2db900ad08185b61bf101e60fde6d591578044662b7. 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/USV351431162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7170ed2917b1460b72712f62749e22f26cd993a8caf9f5c879a4040f20b9efd2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USV351431163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a775e525c6b0b1d46985ed8797347540d4a1036fd78b7b9ce7440e9018ec959. 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/USV351431164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16caecd578a42bfc1cb984ae9ced54299b95b58487624869eabab2f90ffd62c. 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/USV351431165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e0bfbb3c0a61c6d1b8e1de4e2a24b2d6ab6ca711cff38322c89be62600200. 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/USV351431166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2e98912911e7a8fc3979fca9167223a6243c9dc3f4a3d987a63f485507470. 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/USV351431167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a66b931bcd3b263e17badee8c7d9dfa706a7223a8c93498f3db2e69a621d191. 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/USV351431168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838b61b3ae8ba080de10aa2d5438aad8ed0f52c82c067d14f299b0e88a84ed1e. 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/USV351431169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358cfc0c5b6d87feedbf2d605ced49481b3487039ceeb683c3fb8ac96d3e8bcf. 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/USV351431170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6d7612cc092b98759e4a1f5a4a77dd489f5ddb6bd9a054c89d00db091afba. 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/USV351431171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b40827db0a0dca97640a18f2e3bc4fd4dac82db46e5c80cc9a2a94eff3c861. 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/US6R21412152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1dee84b53d2b7a0600b4f271ba7d4248707f0d1d679991cf357f7654322a77. 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/US6R21412153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6538a12427a84c70ed7464af30c65a750b5fb069d22deeaa1dcbb879423d2b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US6R21412154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcdc5187d5d5efda8bea983eb04e0c1a47f13d28454a3522b4d4ed5a92a6ee7. 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/US6R21412155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b57870447f51dee1710f32cb5f561191486c614f02cc5d39f5bc5dce649c72. 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/US6R21412156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a35d3c8f24a8237fe898657eae4879edae32759075e55c085762c6c7510d2. 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/US6R21412157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271fa460e5b279f6fa79f25af158fdce813f2ccc600e2fb125553844d79c9f73. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/US6R21412158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d413ad03e437ba27446e7e4b54e25d90ec6b80d0530d24a8e94bd167e1e2581. 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/US6R21412159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef50edf0c0785739583cf9edab891b63e3c51e5126a69e71486a9bbb9b8c3cc. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/US6R21412160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f172420b061c0f8f8aba5af0de7495efbb2f3ff6717bbd66ab405496181bb3f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US6R21412161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc96e58c59ad7e9ff615249b9e2f8af4500baa5711997c5f35e4a123b81d9c9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US6R21412162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791beeb018c642e9310dc71c86906e1f992d15f8ccb6561edb7d7f14cba4e42f. 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/US6R21412163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaecdcb490244ffedd1f18a2d6d8c44a3e7f4085ddb29d45596798afca6efc84. 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/US6R21412164.