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 0xdf9ca6ef8634af32b57ed0c0f34405145c0ea111cffdd186685fd8f20ef2befa. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c383b99-e0b2-40cd-adf2-5e0a1c424e08.json and https://artists.proofprofile.net/proofs/artist/5c383b99-e0b2-40cd-adf2-5e0a1c424e08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lady Bess (Live from Theater St. Gallen 2022)
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 0x12d470e02364627a129df853a91f075024b8419b3ca7d6e9e910b87348eafce2. 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/ATM892303600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e5190975da5a2a4ed7cd7fabb221edc3f75f6f3f7ac83081285804fe10c1a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATM892303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a85e31a1267d896d5da5c2e5ea2f47f40c854b4ae747813b8d8050904395f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ATM892303605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5e30593e7ac27db65994406f75e4314faacf387b2576fc42c395d013c40be2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ATM892303611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c60c35eea850c18d804f48ba771a7999832a9bd63b0ccff7c1d2372464588b5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ATM892303613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46b14acf6a46c04f16688b9c819089de24266382a2c35dde489038f64384d9e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ATM892303615.
Finale 1: Da! Der Kahn des Bischofs (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb380e5c817ac8b1d7498b7d90766a99a9b1d07013b46fa50bab685d9a22d008. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ATM892303620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22239077824cde4a037e8af97dc8852d755c7a4de43c8ebc6ebb22ee6199d410. 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/ATM892303622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe130b26589db0e5f4b1030319aa0269868e308d15e6f9b320b29ea3c7e4d4f4a. 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/ATM892303626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca941bcc16a283e70e606ba092afe5ba53ff3f341c79ac0b80055389b05e6f12. 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/ATM892303627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d577937721fed8ce1454c39139aca06f72f0167710c4adb0adfb00fa2918dae. 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/ATM892303630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b27bd234eeed7f5d38e3a87030b69d8ea987d952e6f786e467e1957c3cbc1f. 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/ATM892303634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe0d7dd39f4b7b711500d8af4d715eb390446568539a3a4f073626506fd4e8b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ATM892303635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f1ddaff782fad190f6696119cfaeaacb37340ad02ef3a49258b9d4e7291aca. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ATM892303637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295cc219df32776820a3949c938d94a95ae2bb2ae0a1d7a7f11fb13a40c2f668. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ATM892303639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae0944fda0f0d9c6367797e5703fdaeb15b0f86d97469de37d947d7fe8f9672. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ATM892303640.