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 0xcad3ce342b78b1e800e69f417e418c9cbfa673b0dfa8b909c4c1e74e1b570066. 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/094a413d-0e4f-4334-b4ec-1e7b9f325128.json and https://artists.proofprofile.net/proofs/artist/094a413d-0e4f-4334-b4ec-1e7b9f325128.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 0x527bed2d6acfa7ad2aea44339988275a1197ac475c22073e81b71f7cfed892b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9M2227390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203fa090c75982982107b1d22a910bf7a1b4c3952c6c9b7620e214df679595a. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/TCAHF2345513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf49725871e4e85632c0901467c3d2aeba561ee52c40c72f4df520e2790a07b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:07Z), 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/TCAHF2345528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c98c361822b5799877fa597bfc11bbebfc2b9d84401d095b995a255e239a1b. 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/TCAHF2345555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1eb712d30f6a1e56b921073e6565f9bb5f8f4de015fd3a6a2e790afa9e0377. 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/TCAHX2433651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2203425555b935955347eba63ae717370a57963a9f503ce85705da51fa25e4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:01Z), 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/TCAIF2438547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b46c456d420c4ec4ef4dcecbbd823d2f823874f1c0d57f2e5fd0d4af516f6de. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIN2437730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0174efa8d4d0cd4b60eeb564129563ec86835328e03874ba31c5a51e0bb9eb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJG2535892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac79a25f2d9d5d046b9296234beab6bb9015a06f938e10a0cb65e94f5fd19d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJG2535909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7664ed777f9d4c04d9b3afa46ecbe20c783a03b8f45f5ea4fdc6d1f93659cc4d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJG2535921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0e07f03671cefd54bce27b3eb0161c8a842572c8c5c7a0f58f770dd91febcd. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAJG2535941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d8be46a3c6c07877c39f9cf932ccb9e6b3afb53be036ba9bba47b8eab97b2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJG2535961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa56a1584ae968fb684f9586adb7239a2b75ee692b962ea1b75c382c6254c974. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJG2535984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044256fdc80b2c5f0cf576d9a79c0d6622e5271bf4d95bf96ffb6a8b8684c15c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAJG2536013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a542a109c178512bf4cd580af9a6b6b0079c8416a4d0298aafd474a46d52548. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAJG2536036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d154e5df574e1878b6b6bdeed8755c619b2b1b4b52a86fb2587d66627b7f079. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJG2536130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d386e1f58b128557284bbe94df15c29579ef5f407df10fb0a9a8e44bd30c149. 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/QT65X2563591.