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 0x6d5e8cb558098729c8efa5a595c0c28513a0011e083247ac14560f4d16c5b02c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5fd167b-f328-40c8-8e47-7da10beecdf3.json and https://artists.proofprofile.net/proofs/artist/d5fd167b-f328-40c8-8e47-7da10beecdf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where You Are (feat. Anton Zetterholm & Ana Milva Gomes)
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 0xc053fdb982421822c27a1823bba38566e97926656ccf3c3abe3a9b8e206a4671. 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/TCACU1610589.
Lady Bess (Live from Theater St. Gallen 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7dbd3938d8682ccea96c7016fff9355ae691c93720ba5b17f0e1c4a986c6b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATM892303599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6d6fefbe44dd6221b63c8bd7ae1921475d26a81a5d906a958470fd0add0186. 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/ATM892303602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5ffebfc07fab54a645167071d9315fa89aab6e33c28efad3a892d5ecd88a1d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ATM892303603.
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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae7a155ec60d8e09678943f11164302029e9a8f2a4b88d78d14934c8e4d205. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ATM892303628.
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 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.
Elisabeth - Gesamtaufnahme Live - Jubiläumsfassung 2012
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddd5f10bfd65713054c274e3782aa81393a697c359143dbd04cd4442411e7f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATM891201966.
Die Schatten werden länger (Reprise) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf637325b81480e3d7293283c1a47da2027b08870719648fdf4d962fe0316fed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATM891202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793fe9a24d5eb86bb223487a872189c2959f6ec2852fd7ee1d8cadb9528a42d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATM891202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71942342a7b7e3ca9b9f118bbeb597a4ee45d515783b2fd2bef4607fa1e06e37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ATM891202006.