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 0xec5a230f14ac7f1dcb6e5d42147fe5b734633d7fef0348c13ae7f6eac0e6db70. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/916740f6-9500-4391-948a-dacb91db09ae.json and https://artists.proofprofile.net/proofs/artist/916740f6-9500-4391-948a-dacb91db09ae.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 0x63b038bc2ecba8468c76a78b3a6314f62d969ffb291ede00ac09985484addc4d. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/USVR90240402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe205cd00c37da1a8b8ac96c727cd183c31fb08544b940eaf31082440d87a4ad9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USVR90240405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1771c3c4b24ff2f2e66c0beb9d54bcecffa19850e68e2729cd7bd45346b1d5d. 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/USVR90240408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa5d87f67239d9ab9866e1daca19b32ab8abd725ff57204a1f2e9cbb782a12. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:19Z), 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/USVR90240409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db19c903393e4901a274505a40753daf9d5fb6345f8d1101621fa589df7b95e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USVR90240410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feee961b46d158023994152c97120c46c04154e281c2483b2689df5f815ca9a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:27Z), 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/USVR90747103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8c6fe7fe20f7ab822a08dece5f8b3689a5f592d0e1324f62cd7e2ce188d6fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USVR90747105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd273dbab281f3d778ee79b13a459bb153a84be0671d43056263790d6dce9f3f2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:12:02Z), 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/USVR90747106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c1d5358fa82e0499c39fa57690d18158d09a4123bf0a47f92e49449728cb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US5260810807.
Tony Hawk's American Wasteland Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9abb1c9abe693a876bc8b679bae814283beb2437a54e170fa104ea9972abd84. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USVR90542007.
The Killer in You: A Tribute to Smashing Pumpkins
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5aa4f2e9f77e317bdded636f5b6b959cf3f541c8fb1ea86ce341372c6de033. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US28V0510224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3bf3ddf86ec655671c4fa4648b41c5dfd7f0f3b15924e66b83acd0bdc0cad8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US3DF1816418.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8b6de5327f5efc46be8a62e48025f050984187a526f2975f843bc96ca5b7d4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US3DF1816408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94efb804a87dbe23305a4e99286e39a211bc610f3cd1e7540c22ea96b6fa965c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PTVI19400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b35c359b2dc2e7179f8cbb969f5f09e9e2c37f7f04adbd1dce4e874f8dab6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PTVI19701382.