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 0x9d2715ac5fac758496dbb422a1fa52a494ecc0d71c1484fb5e9bf8acbd7be085. 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/e2cd9b43-3de0-443a-b1e6-90f0937e4cca.json and https://artists.proofprofile.net/proofs/artist/e2cd9b43-3de0-443a-b1e6-90f0937e4cca.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 0x8d833c61088c5097b0c4176db37f8c20c0b1ec601346c81c1eb6067153fbb53d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QMDA62127814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11ad2c71a8c17e48762e7436bd1c993372189ef1e99643736b66efe4b6e7317. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:55Z), 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/QMDA62127815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8594915cbf63284aa1d6b8f40779835bc9d9f8589bbcf581df4d5e9f0f61422. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMDA62127816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dc6f7198b538f013fd257d94e62aadfc8651cf37fa2c912751d13cfc1ae7a4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:26Z), 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/QMDA62127823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba9603d18a910e37f72d91821ca73ac8dbf2211eeca0e17d223038adfec7fdc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:46Z), 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/QMDA62133151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd046a8473b966f51c37694ebe2caf0b7093537b4b402abd5b73ad8f39a2865b3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:35:06Z), 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/QMDA62133153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13958f16d04971457075fc15afb520e08ef5e0732b51265bee6c1c7b4c483d8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMDA62133157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdfd2433d8feb41eb11615366ecb23b4738dd3c1f8d9e527cef2d874d803c60. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA62133160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795fcc508f3d682c69612a2559a4f21af5fe9d6d87d26a255d97180c99223e4e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QMDA62133162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053fe84ccb3366d2bfae50380f09b68b476cc6ea301d44adb7c56c0515c3164. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:01Z), 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/QMDA62133163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21aaf355dfa7d97e4924df7539518a0665c8cba3aa0cbe0074e759a5cc74972. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMDA62133164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1995c3580a767c0fc2c5e15d7ae7544a0cdfd3780bf610f39007aaf5de7cf5e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62133166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2429e40a2699a4741e9d6fd8474a6fc1bb861cdd661c08560a2e6d012b984b1. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QMDA62133167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cc036d836347d945ba72f3f7b351d4c960c531d34ee86cb5e57afdf660c765. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMDA62133171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016ce74edac87069a0d3cca4e0ab667f1ee44dcbd081d49ecb64a75ef2a0f275. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMDA62133174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355b9f0d4308bb67aca3cc0dc9d28da2cea61cdf513bebcb5caaa518acc12102. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:35Z), 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/QMDA62133178.