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 0x18e6189457694e8ca280d69e9b0433026ecd8bd95f612c89394e6b28ecddd29f. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87877e2c-2dd0-45f8-a6f0-0c4ef73b0e0f.json and https://artists.proofprofile.net/proofs/artist/87877e2c-2dd0-45f8-a6f0-0c4ef73b0e0f.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 0x76911eaeb90a530a760fd613c2117d0a3c1ac26b58149886c82a2d2a6c59c406. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTAW2379760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68356902e78cd7f8b612d12d6e070beb0e371cd7182f8fc23bbc22ecb723fc20. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB32336819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee602455a033926a2b7ae87b97d3ac1732a07166c11c43fb481cef350b996a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:29Z), 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/QZTB32336821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017f03f8fd1ecf8c1f9c8da033eb5a7c8015afa7af5983e95d606ea5867b9c3c. 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/QZTB32336074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb78b5e533a36a194378146cf033fc3f880ce7621acec72a3cecc9e5a584e450. 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/QZTBD2309383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914241a8f53eda22a665faa162aad6fbb61e46e68dce08ad72164b642b000d37. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZTBD2325859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac818d573beb329800e047b755c2f1f0c3e12cd3a7e28cd326b3aa0cdd23a4. 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/QZTBD2311069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd708df44993aed4540d309c24b20c7d655688ded98dbe1f7f850b1d3960f12e7. 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/QZTBD2311065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc809ce31fefcd587d1b8dc33a1b1a7dd4dfed040d8cbf1fcbf6ead32b5f62. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBRKQ2525418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07adac8f023925beabf8989929d6b3b35b2d6bd28358d21fc387e79e1a0a921b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GBRKQ2525357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad91e46b957a08f33bde271bb9d95e233f857186931f21977a7568dde687b73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBRKQ2566524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df0433d5e9d45b033ed4fcf31a3ade50d5e5861bf250094e64ff494a1270752. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBRKQ2566598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b164d98db39175117f740495a34887a1c0aa6a8386061e0264df73ab9a241. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBRKQ2566690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8cbabc6f19c44c0e8fad31d39bd9d559d9760f7984ca02de1e0feb3dafe93e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2566666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc5d0abcddb15f4f35c27920bf47d25df3b95961dd91cddd8290f8e31922c5c. 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/GBRKQ2566632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3831048c0f6a74f6de006d704beefb02d93d959ea3cb9a0dbfe7c4008e9d68a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBRKQ2525247.