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 0x719cbc13df8ef7233b6522080557a2dc6367d2b6fb840500b01a485f48c450b6. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a593c00-2dea-47c9-b51e-ea88eee33f6d.json and https://artists.proofprofile.net/proofs/artist/5a593c00-2dea-47c9-b51e-ea88eee33f6d.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 0xc818b03a0c7e204b0086f8ab3a271f086337864a2a786ededb322c141344cda8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:35:18Z), 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/HUA612405488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee558647602fb0b12cd0c2e445616eb7e815905939483b33783523cb473c947. 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/HUA612500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c187669e077f1005c7ed9c8b473131b80d9fd793cd7e3116960b7fce83ba82b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/HUA612500638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28025546986ee77484cf6803ca22cb59d3094ae9d0fc41788a3e89426befc9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/HUA612501141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0093081791d2f3fae1b0202680fdef870a30c72ba94a2220be4beb977d5041. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:10:38Z), 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/HUA612502892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc818b03a0c7e204b0086f8ab3a271f086337864a2a786ededb322c141344cda8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HUA612405488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705fcf16674e7dbf9dcc46000d50f273d8288a5e3111111a673bfca8e4b5eab7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/HUA612503281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf167e42386d1413086134fd7fc375b5b358a2840ad6b28a993ed68a5fbd7de7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUA612503637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c57cd132d5378f684827ad8d619d08173e80af64f8186f95c65e1216b755aa8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HUA612504237.