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 0xe9e640b9167652a501599abb6e810cd9113c25412038225b4f2ec18567651ced. 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/e514d5ce-8cf3-4f13-ba20-0c23251e3b8f.json and https://artists.proofprofile.net/proofs/artist/e514d5ce-8cf3-4f13-ba20-0c23251e3b8f.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 0xe3fa7d429cf715b886188564684db2d1ad6cabd185458a1f21f0ff6fa58c5ede. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BEL951500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40653de61ea0cceacf181ead7073581d0b3f79f6b483e9032187065090ce84e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:04Z), 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/BEL951700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbaf897961389d689e84c9bd904a5f1f6306dd464718b939c25f2bd3b3e98cb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEL952000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66f1ba5e340676bec78cce01acd7f3524e876709ce87e6b8a40ec0ef14fd9ca. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:40:22Z), 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/BEL952100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac9c699a1a077f0f79a7b4924beaab49d2e39a55d345167ca635f98963218e. 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/BEL951800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4682ad40c3107e86465a7d8b41f272216a5b0d58c62d99bf81a46915fc8dda20. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:01:22Z), 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/BEL952200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598883bbd0fec7456dc7b85cf0140980bbd05e7ffffa05ff2fc39a7ad2f98fed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEL952300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3118ce7825c222966aef4b49f35c2a184272d110f8e8ed50293db6c7141778. 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/BEL952300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5795481408d94fb6a7203f04f234db5c6be4898213b025ffbb782014b4292e2. 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/BEL952300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b60fc1ea55e982e818d5d69dd73526cfc23f97e8a857df2ca3e0fb53e5b5ba. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BEL952300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bd63d35ae82d8cd0c7b358a6ffea2a75b4b0b1a5ee00ce650aeb8cf4e89f0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BEL952400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5539ceebf017e55dcc61bd6e33ccc34bbac7063b03c7c28990efa15f28f0a0b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BEL952400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d30bc6283440acac60a5c4561995fce055db86971fcaf2940020e4b82f1da1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BEL952400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ee61f45a12b193c3214a34a5e6f284c0b9803ca091796406f56a3554f095d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEZ452500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba28ade13babb2adcda4b1c9887810432814c0a2ed56de0c17707bc0e22062. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BEL952500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb341afc13c1f88361c93e3af7abe336a1c11cee32a67dc35e094f17835f05a4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BEL952500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751f8f56ec4301197df21e42d228764ae4718b65a6e252b0cbd81935185d804. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BEL952500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20d3bac94a4698aaa7ba8992c9de87c930752f2219414376e382e3ad2882d7d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BEL952500007.