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 0x58c581cce7874cfac825a5fb8d7d32b8daecf0c0a185b253f48540a21bdfd024. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40419c59-8cde-4a4e-aa2e-b8cfa7ff92ba.json and https://artists.proofprofile.net/proofs/artist/40419c59-8cde-4a4e-aa2e-b8cfa7ff92ba.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 0x1c90ffba552bd05171687b580869e16876ceaa2e07770da7ca8236e0dce8a535. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:43Z), 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/QT3EY2410997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07ccb5821c346e69f6d1b0e30a0602ce50bf9ddf3d57fc394f60de89dd9c42. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:39:32Z), 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/QZFYX2532473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070bb4aba3063c907a738e276b7db6514a76aaa69853256cee1b8b4f729eea8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFYZ2593499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8c634a6534a90569b14d9527f7e3fbce0439979c2c76555a2dbc791db4289. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA52513182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29436106df8ea58f4a754cb6ca68399f7330f1100e4d30539ce8232b4008f90e. 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/QZES52523098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4838c5c0a7e885fa5c27de5f41b4754af0211b6cfb3e17f4ae7707ce4cfb6390. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52597731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959fd8d072f464b77503c05766f9231534a21c1e6bbab4337c5bf779875df1b1. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES72524577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedfb5fbb88cbbc029de5c5c11c62835faf3fbafd2c4d97ce9c828cc95635e0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES72526918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de42a043a6334726f7b158fd82c13a81cf562b0c8c3088918f3d2ac5fcc8e8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES72522576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f46637bc0450b7a5d64a4547a90b1ac9340beadbd31908cbb10772fddf4f8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES72597585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5672808d57d0f4e633d9c916dec83f58e2d2cc7b057b184c0e83750355e1ded9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:04Z), 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/QZES82542935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55342e0be8f1537165547a6fbb3ab2c4fba5b08e46c28e614356460069d7364c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN32506984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc413c25d32f6ff352a298f8ceee5d69da8ba74712392b78ca73df3cd063850d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN92520672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fb4337923df2de2dbe7ab59c160c542f8fd184c67a744c5aa5154a3ee7149c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:10:53Z), 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/QZHNC2557155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85be5124369e43c25c4d196c070402045e0d3b209e1ad24cd459a737db3b9cc9. 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/QZPLS2506814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc39901281f0595467a38054ce7fca62fbf5e9d49c5cd4747c85d18be5fe656. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZPLS2525282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907678d8fec392155df47ba5a1bac25a1049998832676f63172e1869a9855eb4. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7Q2563622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbc87325e80e3b71fcf448147c3a126de02f8e45d26206c373712892de9a268. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7S2512056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b1ebf8e8546e17f708ff91f309d449186fdec92d44b2d9d068d7828139ffe7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT3EX2507281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cdf850049b4e934c7201f699d781bd81bffe9feb3d5b60022e56cdec2b6894. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F92507966.