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 0xc8f651470841cb4e9a04b95e8765b2daa47ef088c2da988257eeaa3594e99a93. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ba9eec-6562-4dad-88f4-e02e453706ce.json and https://artists.proofprofile.net/proofs/artist/10ba9eec-6562-4dad-88f4-e02e453706ce.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 0xf352c0fdf537223a6d9482da3d5402d9bd1f826a4d245daf6fd093cee15f9646. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GX3Q92371900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60d48524d10b66e1d805c44c838e3ec2c38a0098fa325a619a969338c8b23f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA42374335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc6f912374ac7c53e6de01a853f99bc03821d41dcf48b20ed25b6ba9410f1e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX3Q92390239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa70166b78446a8a994f6e0d42b409b6df558c447bd72c32bf64df99c8549baa. 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/GX3Q92386179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ccf9233864899d22b15bf9d4b489ed223d87435e6538c9687a71b63be528ef. 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/QZDA72342202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1499c8b8dacdab9036ccecbf228097c622c07a53185ec775deab5c3f086e02. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:46Z), 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/GBLFP2350073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2527fcea361b116f3e6cbe9af1e7ddcf407e8c4b5a16cf94bbe4b6dbf8ba760d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZFZ42387772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0aff31d94157e252f400b6876de4dffc2362bd28d032e1b7fd10aad91ac98b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/UKXN22379171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82d916d8e58b26ea6128704f3868ee6364ea20d74de5217e810896188f61ff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22304592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9327ffe3bf3b154635321539736b58366049756666ffa500bf714eb1d61dc56. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKXN22416295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cada9afcd822e3f6fd1088beb65f34ea20967ee56f9f539360195eff1072899. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ZAGLV2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584b3e45c3758082858ecb6b685af4ff21689c49f599c5fa638e4507212b9e18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAGLV2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcc485bcaea2a8c990840dd24638c7eb471ca799b08a3eff24c6b0e0454da4c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ZAGLV2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24281f9f4fb9e42071a09421a355f969d55887a7b4f2178aa61fd8958f5feb6a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:04:09Z), 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/ZAGLV2500018.