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 0x0cb53a9b2cb530c3724e7020ba49470c875b74728abb70d9e6c0ca1848be87eb. 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/8bd0b3c9-f62a-4991-9cf2-e360b8a85d36.json and https://artists.proofprofile.net/proofs/artist/8bd0b3c9-f62a-4991-9cf2-e360b8a85d36.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 0x0a40a6a36aa1706668c4db1160ab49b16dc2ce1bf714137fc9b9bda600d1857a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAEY2051194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d862d5e02f550da07b9abe40b863e97ac9dcbc798dfcfba65fc1cce5cf0769. 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/TCAGG2203302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d20d9e09283ae282cca678b60a31cf97f1d0bc741a7d59f2ea20c934e1bfe. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAGG2203309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ca541ae40e8c4fddd9df6eb229c231fd4e3f20cdcfca9635de4aa8efd4c7a6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TCAGG2203312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f8bd9107b99479e4a676d1238f6db116aab13935d1d275821c44640ab4aceb. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAGG2203323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58ec61dc6785b954cffaebda22c688482d1703b179a11b888dc3373fa006daa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGG2203327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91176d9fed2296be09da30d97aac19f5e312669238a35bf7caa1195b5f0b689d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGG2203332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19dcde11b148abb50fce3d7787fbd06e81e5174ad6372c04e21f2fb9307e503. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAGG2246702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870b15c8be7ae58281d7e55f9d3cfb1df1b61cefafb871c68ea2522ff6ff9061. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGG2246708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f88b7095cd58c5eae7e7393d3c9a8e6f0d692345f5a6964013264f53bcd5e7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAGG2246721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce979513f17d508433ab417d172b038595555a6d0c4ca3fc56f112d5f1886b1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAGG2246730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09bf67fcd247c399a21aa1d4ec9fea8f167838c625d7931bec40188c7d592a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGG2246744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f3f64df20fb7039eb69f332c564ea51804aadcff0d6d3460c42163ef4cfae0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGG2246739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb7d94a977503dd09631b0e9753852ee4f188ec4198bc4e6265ca660622beb5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:26Z), 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/TCAGH2229133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de88adfcd9b89cf9d2af8acf45498c21cbbfd9e578ac390e06d24e7c9393b7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGH2229152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd1c14ba488f77d8601726d575e6147b39f0301650a7d6ec2710e87c194fd8. 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/TCAGH2229181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2eb736676e9b523cef2b1789f314becc5bc06b637925fb065c0473f465a1a1. 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/TCAGH2226464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4512cbd91de3f0a18ef1ffcb69d2ccf9ea61786ad206f3fc79daad73bf1b046. 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/NZPB12402820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5dab2876fd5eb798cbfdf62f77fe791bb7d58339d5ef1cfca2f5dcf1054435. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NZPB12402823.