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 0x43f38c2751e962eeb2a31e8a1dab904dbd24110c507e7bf466a4345a59a09271. 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/ad2137e6-9572-47d1-944c-515828bb61c7.json and https://artists.proofprofile.net/proofs/artist/ad2137e6-9572-47d1-944c-515828bb61c7.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 0xcfac63b9e6778380adb93756d30772328aa242733e8683c9bdcdc93e2ad29cde. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/BRHHC6200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4283913af300c37800a578ac11ee279adbfe3ed3095c02e940b24493aae2423a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BREMI7700539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb8425dfb0c85c97896c1c97630b74b2fa44a3b0a6e287bb5a277d4859eae46. 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/BREMI7700543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb07d34ffe083545daa324b66b035d859fc757cd02c7f5cdfb75ad56baee463. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BREMI6200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9b42ad63f5aec9db4ac15154c95f5c67d8f4ec7309c04bca1f515fb447631. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRDEP0500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad869c344e45274f2e29500895c51f84090b9d25eb54bc113a6482401bff0a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:58:54Z), 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/BRDEP0500439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27433d441eaa4100ad74fc0f6e60fe3583a50b13391ea67edd6b9a52c5d49765. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:01Z), 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/BRDEP0500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884a4ca55981546b056c1805f8115406a43073037b76b555242c66f1f87292b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRDEP0500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b82ea606580f3d2f353fbdfe5183ba992aabab46597eefb5c17d6dd431621d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRED60400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73111b4c4149fd4cbdf71bea8d1d9d1b7227231c5380730050a4d4e69f085db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBEWZ0302908.