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 0xc25dae5cc7edaf74c85ed9b9b5a37f6fa215c404d99f2e1de6b6cd56d798df83. 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/f87937f7-b7d7-4f33-9bcd-8f03c216aeff.json and https://artists.proofprofile.net/proofs/artist/f87937f7-b7d7-4f33-9bcd-8f03c216aeff.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 0xf10501fd42b9b9f8db22fe1d55238d3d92284250ef4fd679920fc41da19fad69. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA072416644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056384c6a2493ecd0f75385a0deadf2d4e7dcd50c70fa49b13988fe5b202cf19. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:10:44Z), 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/DGA072416646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa33bd97310b9a5dd499bc5c6f85eaf29affc504b2e257215bc1c54f046e9c8. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA072416660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4343572bfcc06870ea887ef64fdb6d6a2c7edc0b2a71c06296d0c892ce0ea7fb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:44:14Z), 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/DGA072416632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70974c4927c716b6d6e9d1166fcb6363605973ad74c42dfafc76f806cdafd60e. 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/DGA072416616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58d1eeb7c4531e9686944a937cfd37e18c9d619d1580a51e595abec5215bb75. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:20Z), 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/DGA072416618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6602168e9f727328bd021f2605ce034d5aab1f6fd594c9c47ac9c0cb17dd44e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA072416623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2bb0414ca3107d6fde30800a9cbeac415e25220745c1c4e74db8bfd57dde63. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/RUB731520957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcd858605a34e6a1c03c2f74098e00d9f3422eb45a6fd43dde068adbe0bb2c8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR59R2547730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915507ae283351f5461873df136d248b621c4170399f146506456ab685e40a3. 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/RUAGT2578454.