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 0x086665d76d79a7c3a4b825c4e6610c2086cc79449f240b52126b262babde8bf0. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca4ddf4-f2cd-4b54-b561-9b55b344a8fc.json and https://artists.proofprofile.net/proofs/artist/2ca4ddf4-f2cd-4b54-b561-9b55b344a8fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alexandra-Yoana Alexandrova Thomas Schön
Dracula - Das Musical (Live aus der Wilhelmsburg Ulm 2021)
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 0x4c44f5437c6e4828870873d57758b830c4bc0283fca6abf9ea76f4ae1a3be970. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ATM892203422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61e7a81b2b9e54a15126990ac3f772b7cc42a55ba391dc9553989745945c559. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ATM892203427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4820d78c2a74b398a65be52285ce752e6c34a911e306a2a4ca4dec3c494673e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATM892203428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1cdc3acf79f0e64a4974a66addde8a0f70c71c58fea475f971681f9ec6d5bd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ATM892203430.
Lucys Begräbnis (Mensch vom Weib gebor’n) (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5fb57b5ef4af5573e493da2d7449d315157b51067306dd21f0e643310b615. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ATM892203431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8726e35b317c971fd34ae457e6878d46a16d926cd99999a2335af1c9234b5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATM892203432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a6744f3428c18f3c30978c631eb779cdb4e44ef661b7c6a2af1365ccf8a757. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ATM892203434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad5d275f8ac139899bf3d070da54a2400cf1630142fcc20ec2a7c04408d8c08. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATM892203435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12173e5a616777901276d633b599f0f3fcdac945f48db1bc65e12272a21ddfc1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ATM892203439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a09cb55295d1ad6ec97e19120d5d4b95036f3fe26b48c9e761d4df25eda0e0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ATM892203442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe886d3f4927c62c2fada7f90879869c85d00ae49df7e65b093490f3cda0e08c8. 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/ATM892203443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d7cc5782582309fff36fa6ffc3fd293eca3dd0f004c896323dcb7e1c7b6524. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATM892203444.