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 0xe85053d19f6d771718c5b0a07ec94b7caa5d37af9540ecd20170ebfbcd88ccac. 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/bf67e02f-14e9-4240-9744-71687e0845c3.json and https://artists.proofprofile.net/proofs/artist/bf67e02f-14e9-4240-9744-71687e0845c3.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 0x4ef98cc40419548f8eb8455a017f1c08b385c61d841c88903557d975a5e3e4b3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2015160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0722e46cf22e21dcec4123e3f86c076fe38366492e0b8be8fabeede9c2d9e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZD1913907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2b6c2f83b0b76f4f3bfdd2c5ce6be414bb9c6be12266709dd49b811eedd07. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/CA5KR2015161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f9239b7d03c58ae55d0f90fa8590848340fc949670282525df83e0237998e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CA5KR2015162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d8a00dc469643d5962eadf234be875c53ebb7013ecb000d2f8ebbbd78dc9cc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:25Z), 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/CA5KR2015169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ff85c99f3ba6c581433e120441f362011338f3bb93bf1c1cd7e3aba2bdfd5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CA5KR2015164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a63aed299f08cf2125f38b3d2fb0c22ec5af35053db867264d2b8ee96458433. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6G2233439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0921b60ec42c2de34ee70b4ac14d892e4659bf1a0b3906823380e4e151805318. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMBZ92271315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232e1a65fc70bc9a763dbca840e2afd5ff5eee2eed992795cf69b06e7e93bd4f. 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/GX8LE2220658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c9c1b13a3033a865ec49e208c8cbe129fc3fa7c5e08617003c777eb088556. 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/GX89G2301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e865ddcfd381a44a544308ef4798ea10880b4fd79b422f072ec4c0ccf9a969a. 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/NLT2H2300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc8a391827ce7850de87dda6cd52303a961e5f5af19dbb1a4db3b45532dfe7. 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/DEXO32311492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f77e71836ce6b06ac36f815237a4406f7dd4a72267f6ebacdcf4f6f60f202. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX5MY2578918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab67fb27a11f775facdc7ed7065bd2a8192f79903f0f008e9299f003d243a7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS632107856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b70cf0f0eded8a85f388494b10f65eabe43e2c024835f43054acbe8fd18ec. 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/NL9KQ2390093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478485f7a3c3704f686f05c4192e912974b50308e52dad0812ad99f0fa1d0d16. 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/SE6XY2542102.