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 0x558b8e0d1fc5aeba6a8ffedf5422f1773f65f102ed272c86d40a2e826338d123. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/346128ff-75dc-45f8-99c5-690c69cfbd4d.json and https://artists.proofprofile.net/proofs/artist/346128ff-75dc-45f8-99c5-690c69cfbd4d.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 0xca8c6ed3fc9019cabe036b6a70adbad2a1612e0970d233a028b920d71ec70967. 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/QM42K2468722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6501a3d9b3399d05397e291e752271263a387ea5d3551f403398f8e08c2f694. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZMHL2440333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77383363d6663686949ce21a12326593abaeca3c9f02250bb08e17fb19f716d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHP2438007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db1f8495c89f4e9d82a4d51374944a6a236fb320d7156938adf18724bf48fe. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:21:25Z), 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/QZS662421076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb587a44c4a2a5bace9bfce4bab9b973d3b3cc787e8446891820da7ea1955a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMHP2436694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9430504a2ab35180e3c682f083ebb62fe3156679ccbc2041294f578ffd9b3. 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/QZMHK2499218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f1b8f19498fe0b071e391a7e7a46240da011f56f9d034e18f607071aaf8574. 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/QZS632547798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed219c9f5c2bc026fa3ebaeb9f5270d6fd15efb8b53831e152a46f0692e88482. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:22Z), 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/QZMHK2543979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac084ca8772e6ca6154712cc87ac2d2f7f8f2e0e796bb4c5eb3d1b22c751d3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZS632534023.