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 0x1774bb33d85a37c4c748845a31ac7e99d4c0dfc15c5d2deefda2b4ec374132a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bcf356b-9757-45b5-8890-471fb5f7d07d.json and https://artists.proofprofile.net/proofs/artist/5bcf356b-9757-45b5-8890-471fb5f7d07d.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 0x3e313bd46ce91790aa95ee824a48aa44424926d02ba876b3e0b794a6837c3b94. 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/ARHR91600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0a1080815834d09e8fbb65d43a780e2ac24ecd7dbc1d77a0a8c46fbe4241e. 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/ARHR91600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306842897cdf5ca02d990ce3e477c61adfbcc0848485252a285f48684fa1d735. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARHR91600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf94b28b21c952ca33046280aa24a3760f5986c4c7f075c5a52faef277d3c58. 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/ARHR91600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2157c727dc7d458f7d353d73ac67b02f481fd826443246d89f713f730730e. 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/ARHR91600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ba4988b1cc0a8dc3bfc95eb5411f86c7c94d8a57784462bf0d7b81cc65d43. 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/ARHR91600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc1a81722fbbf06c7785f39826288b634108adbdc93098b76ea584ffc8e3b57. 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/ARHR91600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc165fd06b20cd51404cc81393f04823f7808a58f659083509db911b176e9d5. 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/ARHR91600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818f5b3eca4adf4cbab2c65b81aa7822a14ec0c55dabbecdf74702bab23b59ec. 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/ARHR91600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc945b2b401bbe17604ae6d2e9ccc700e5d916056f8b6acb19259df8e7a3daf18. 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/ARHR91600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99bb76475f1ddbbdd605c33b254cb6b3807bef27460e1aab768f0b9f8ae582. 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/ARHR91600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcb7c6f3830811155085b2c840ac1eec8b2256347f8e914cc6e45b8e5e3758d. 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/ARHR91600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d9533378899ec457b55761af9a4dca6943b8e25cc4108711aa34c4a482a7e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ARHR91600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64340abbc8895ae50c946ef55de107f5fb216f413877d74fe16562691bfe6527. 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/ARHR91600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803112bc75eb533592795f7fc54011a00580010e081342bd8f0e985eb4aa6474. 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/ARHR91600010.