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 0xc49b6e42f43e96462c8b52d89b61b8ca11a8b90b1ec926ba0b29767282aaa493. 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/db2378e7-272c-4eb6-a425-7273ae76956e.json and https://artists.proofprofile.net/proofs/artist/db2378e7-272c-4eb6-a425-7273ae76956e.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 0x8a2ba17416eb9c3b200e8eea313cde1a05bf0a39d8c04a85945b17260ed3e8db. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZMEP2048636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a3dfd6436714124a7970b037ab9877210f26b5c560ebb539f27130b7fb57f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:02:38Z), 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/QZMEQ2045456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c057942cbed8f4ed84bedb7778baed9bf0edb5631c491ce6dc33ba11afb585a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMEQ2297263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69083cdbdb01093feaa66a78ddcba65a4f0eadd5abf66bbd2d124bc132feaf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTPX2236467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1013e41f003e36ce202162523b769020b1138823ca3ed71e9341e311cda30c76. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJX2348363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb519372819a6096ca2679cd1e02904f98b292238783233bc4e0ab3ec91c6fadf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJY2373044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf587fa3d5a8691cd90ce6d8751e28386b416552f85f6faef0223ebad12ce57. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ662474290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd021c6b842c618f1fa0a294c200cb45d7da84c28476119c6b9cc0446ddbe2437. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZYFZ2415666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763fc0b5b70fa0c16b99ad87a3212c145bd606d28f0bd679338c4b4b87614c07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZYFZ2441348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fab4951f5d728657c22a62f2c166fcf18291367a57eb6c735470504bb8a438. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZZ662474301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab37d2f304f9f3e62f8cde55f6e745c5e8c5e2435915b9503c0c5190009a4a. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:33Z), 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/QZWDW2564673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028f2e0afb868d0280f17b476fa450ca7ea691260b301f2fc7cc11531943d72. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:26:49Z), 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/QZWDW2576081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd10a0a42106180274c2785228fd939c2d9129877a9f1885ef3e23cd9a48006e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWDW2576083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe165f06b8f2e71e05defae0264a5d0705864b1651a377132fa5e67dd12b9f41. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDW2576085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55540be4fe164697b274c873796ddfba9f78f66077b1273497dc9242833d204e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWDW2576086.