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 0xe7c091550d1f8dbdd66367e4770de7e410450989662ecf5a275282d7a192fe08. 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/b82b785e-113b-4aed-82f1-1ef064c732a2.json and https://artists.proofprofile.net/proofs/artist/b82b785e-113b-4aed-82f1-1ef064c732a2.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 0xb4c02544db1cb6b4404386164fba536626510e2e075dc4a25488cd8930493b51. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBGSJ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd97e8321f8ddf6ac7f055c0d371a9ea5adf64e4d7a63a1d88ab8cbbb284125a. 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/GBGSJ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2ec5f227d2acd0c920f09bb3b7c0abd5489e590fd61ec68a0997cd7d60323. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBGSJ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1567433c151156040e3bc1db009a51771c04f5b728c6b5b6778dbdb780c2dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBGSJ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce339d40b4c3e7642e60d30bd0de697c455ec587a6fc75ab51133df4fecc1d5d. 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/GBGSJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed6001bc6b6a862c19a4a10ad671526f6c260790d378dc01e709904096909a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBGSJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a80018022374b0457c478cd4185b6eb9e0d7a5576e0afb1eb6015077b61b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBGSJ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163f380f52981eeac49741774c186281b45a26c0b91208615437913559422310. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBGSJ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391a4157c088f26450fc96975522a700dc4f12f7c56372e11c740b0a07a43bf. 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/GBGSJ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f376e13527d084c54b8d2139013ab2f6c5d8116ba846e06df41cd83af0e26. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBGSJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40151a9b33269b704781acbf1e0a5e004bc0669fd2f22029cfbdda7c787651d. 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/GBGSJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823359cf45f6597a7b10743adf0baf0f11108ff5600b218a98c3825a9f428a26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBGSJ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ac083c0636457eb2c12d87fe87b2248e97181e7960632004fd839a880dc581. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBGSJ2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c2ec5f227d2acd0c920f09bb3b7c0abd5489e590fd61ec68a0997cd7d60323. 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/GBGSJ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c20f2fb6e0925475cd3f2007e1b5723432bdb4d7f2184063386d86d15576d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBGSJ2000009.