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 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 0xac3a4990cd121572c7e2b0aa48f3edaa8af5b7007e5e2ecccb86a76ae5e267f3. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa71b00c-6378-4d67-a0be-5155be466b18.json and https://artists.proofprofile.net/proofs/artist/aa71b00c-6378-4d67-a0be-5155be466b18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elves, Rainbows and Crosses: A Tribute to Ronnie J.Dio, Vol. 1
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 0x23aebac74f27ab72e8057927a3fdb1e04023364bfb2100def60a46bd5c11b9f4. 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/ES5621601202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f627d673c3e9ac30538c297a5a550164312198ae4a9005a69c0f502b24c00c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5621601211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47e03b5fbb2653870bd310781c382b82160160e4879d855671b9f115a60f850. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES5621601216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea192cfb454d26e6016d6df6af416cda44e5d8f3e29f77fc8974c8e82643ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU4317162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b7d6de8df3318bdc3473249c2d1b21c73fd1a7934626941025550e8a11ba9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU4317164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8b4964293e34ba32dc144af39862c1998d7dc2adb5fdf3d86b36e17f2ab6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU4317169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5bf9e50ad3049ece0a5d8402f3b08f4ccf15bb4f20f8f4391ba596b130b40f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU3177875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe319875a1aa0df5b1d788f1a287c7808f35c7d0e07c8aa423c3cc77afaf12529. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBSMU3116106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914bbe5f657baedc62141efe78bc230f6d8015241bdbdd700a899ab56ec1cf5d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBSMU3116107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f24049222a0a858045c1aff97a214e1f0ecf336eebf36bdef9d6f4bd2708d9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSMU3116108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf145f40638e539bab4dce529d1036ea8c7a7470df03b6bc1c58395139ac35035. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU3116109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cc3a8b486b44867efd40c50ccf94751fac051e124695df5f0ab4c02846f78d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU3116112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74046a62241c0e85c51f01920e26e96ea5e96254697aef26227f20c701c7a99a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU3111754.