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 0x3efbcf8c153b46bfffc1cd4645152b5052568e3c0c09c5f45fc070c1b147a74e. 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/ad756110-b2aa-4c57-ad14-e5151e08e9b7.json and https://artists.proofprofile.net/proofs/artist/ad756110-b2aa-4c57-ad14-e5151e08e9b7.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 0x2f0833f0bcb26aeba1acf57cd91d8fec0b877897143cef76e16f3bd91473e29e. 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/FIP740300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86dec94248e1468dd5911f083011c9237c517a651b5dc084a41532abadf4691. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIP740300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c238dc193f156eaedff44fe015cd047bcaf9737a7ed8c35c56349e3a5d34a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FIP740300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7fa89f1f03a564860437ab9c4baed19c8635645b061b8192b603cf648a0df. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FIP740300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aa1a29dc23885a439e057f0830cb9715ecf7ef5e094cbdaed312c88eeb9b15. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:52Z), 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/FIP740300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5819ac244f871377e7090a0009e8ee2fac9bbef8e2e548a9b10356ec203314af. 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/FITTS0800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb35825ee78d35de166563d04313c2552a57672f733aeaba77c7126ea28936. 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/FITTS0800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d42bb641a1113018a72e409d04eb8c6b71190d5670d7e4ab3360e4d9509ab. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:02:29Z), 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/FITTS1100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eb2e9aa683fc4c7c70f94ed1d09300a7094a62c9da9a4bdc9376843eac3560. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FITTS1600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f5dc27a2e55730431dbfdee4bd39d4885788526b0ecfdf1d28f61b4d6cd04. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:01:12Z), 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/FITTS2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc775b1f46e782f2b17f3df5de0c16e7f873a1c18445556abe52ee8f704a07146. 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/FITTS2000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5330c3c1b8efb323be7665397ab62bbc4b320c4ba9b0d6bc38f41c0b75a3f6b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/FITTS2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a590282efdcbd8fe5c851ada31a37021667e0fba699b9e40d6f08ca6c4e78d2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FITTS2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5353c368996784408fea1d31c8363e5b0dea2d9099817be1533c92d37e088d7. 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/FITTS2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb2e76ea771932747a6109d3d2c82119a79fdbedac3b7d643d08c1762c57961. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:15Z), 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/FITTS2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e6a20205ffa693d4c277c518cf5db59f4aca28c3abcfffc699a9af1a469655. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FITTS2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7db85efad380721961e1be6bceab3bb1e7fbe48757167a48f74680ec9d6f6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FITTS2100051.