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 0x29c2fa785332dba98bb97c7cd979d319e874f828c79fb5bd0d7b33ce568cd6a9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbcc97e5-c490-4a88-abc7-005c8a6c7e2f.json and https://artists.proofprofile.net/proofs/artist/cbcc97e5-c490-4a88-abc7-005c8a6c7e2f.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 0x5fcb8f731fc90387a7c5703ccf31c09f1085498ffae498ecedd539a9f8866944. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:17Z), 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/FR6KX2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f64622435a0a325b4713fc5a4e1923f756182846a791382ec5dc2829779f32. 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/FR6KX2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f716e480d0bfcbd81471d23152a998520e1c5d0417e33b7536454aca76860bf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:05:01Z), 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/FR9W12364726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e9d74116c399d479a2b9853d49e13afcc44eca71f2e8ca85fbe0ba2142f156. 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/FR9W12350069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826bf72e404b6945d2ff2544e0b1029ea37dcebc3d9d381ca268bad286aa502f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR9W12361785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e8e66c615303d76b04cd68b3f9bc3d993a69683b05925ed6170266ee5b237. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:58Z), 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/FR9W12356010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243331c127b82439426a79c5c4f10eff42c87788122bcaf7f5cea602f421eaef. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR9W12425876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a81d294069c1f29833deca17ab558924d2c2a7666922e881a05c2286963c6f. 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/FR6KX2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56674bb956b9989d71d2922e127b2bb6199c824bb89e903f2234ed0b07c30c1d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:47Z), 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/FR6KX2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb0da14509e5c9ae003ccf6cc5612b3838ac5059bd23368a20ee734343a837. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR6KX2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc231b9c93c8b0fee4601ad103c6bb0b73a119d7849daece0132aa276bf91dd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12446882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16dc72288bb64e82dc2dc9bb2e8dcc93e68cb29f2873576d5116cbeae6c6d27. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR6KX2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a81d294069c1f29833deca17ab558924d2c2a7666922e881a05c2286963c6f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR6KX2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10882e741a844427c8fa5cb93bb4dd7c6d93fbd315436562af62e5ad0809e5fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR6KX2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd94ba9f2222335ef8748f31ead6db6b79e31a295842b3f53e62d57f8718d4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR6KX2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a07129f6a1ea686788cb1c6b7c49252d7dd363d00c5355c9cce561d57400c4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR6KX2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa443282bef87012c8cc07e647126c83a3e811a17dc4fe357d2edcee9376e7834. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:37Z), 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/FRR642401330.