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 0xcec1cd33d03e11345a4db82ef8ff1adb63b6e3f7f583647a92e4ae89b035c8a8. 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/14fe521d-6896-4b5c-80f9-c96d9b036ec0.json and https://artists.proofprofile.net/proofs/artist/14fe521d-6896-4b5c-80f9-c96d9b036ec0.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 0x754ec6d794f8ce3a88ec4ff424229352d0d58ccb78786849aed8d2fcc6e25e6c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRR642400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3be2fb0800ae6ce95cee7c1aff28464b40470f51cbce5db10a43010e245bdd. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FRR642400656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4487e1ed7e241e0b1eddbd9550ed18005f01c367261fbf99f9ccd1ef1ff9d13c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FRR642400867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97fa3b65f254dd325676ed4cd113357c6d1e7974e967e2e81aedfb54a401dee. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRR642400865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4487e1ed7e241e0b1eddbd9550ed18005f01c367261fbf99f9ccd1ef1ff9d13c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRR642400867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c81721e89216d720f86442ffc6f9475f2657efc8fd3a6e1e4b65ce28ddc7065. 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/QZES61973067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414e332f1e07867bd7e7a0519035a0b87e63faa16526c7aad16b8a25ac7ec5bf. 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/QZES61973068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a056ccd880c87cd60f566ac353b58b600cbe54ea1f0135eb0206c6f400f71b5. 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/QZES61973069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4371e91d5c0b6ecd1947a4d0905ae6135058c9becc6886ed357dc0b6feb09. 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/QZES61973070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa5b637482a74d482679d4a2eec8a44eaa8a49df14856496af56219b68f695. 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/QZES61973071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41acddbca6bb19c2ddd14eba67fb840b4a8702a3932a5e18ab4701d099ebe0f5. 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/QZES61973072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b72bc6568b918889ca6214d854dd13166af6d5df2238fe40c1d7614d271d4a. 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/QZES61973073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784394abc76930884e79e8f99bece15ae7b770149d7a350f585e1f021139aa7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES61973074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7535b393da43adb22c639397384810414d21acbddd729dd594c4b8c65bd1ab. 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/QZES61973075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb044a710d6c30ef81c73efe69b5ffc7e60633791fa3ff209ebfd817a868cfe5. 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/QZES61973076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd535d2680475e8880da86df948f26472c7b24b665fbf961f2eee435c982e4e. 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/QZES61973077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41584fa2060f8e830902b1aecd8f8cd1deb2b1b9105e546834a1b589ee53fdcf. 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/QZES61973078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967b07bbbcdfb8ced7fb256652495e1514b35b34ccaec65ca6b8a54a01d0f8a9. 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/FRX872117389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e3f9ef819b4088e84d34db90c74c2bff6805641ba39aed2642953de12a065. 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/FRX872117393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193b3df4ee9253268c73f823c3f19e04a2d5c9e58620fc4af2857f67b4d071f1. 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/FRS182137011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d0a81ca1807a7d4e4a15dfcde4d9d82bcb067f3ac310c46a968277f342f60. 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/FRZ052100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d0a81ca1807a7d4e4a15dfcde4d9d82bcb067f3ac310c46a968277f342f60. 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/FRZ052100207.