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 0x3f8b79e8355aadb0b05d4433178325ab3969f2c17cfcbcd89ed9a81e9666692f. 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/98bf4fe8-d2e2-43dd-b4f5-5251136287d9.json and https://artists.proofprofile.net/proofs/artist/98bf4fe8-d2e2-43dd-b4f5-5251136287d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Il Trovatore, Act 3: "Di quella pira"
Music of Barbara Harbach, Vol. 17 - Choral Music I
Rossini: La Cenerentola, Act II: Non più mesta
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 0x5fdba2ecf585d6b7c377d1f1ed769e36e87648892bdbac15970cb90617749434. 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/GBBBC2400370.
Bellini: I Capuleti e i Montecchi, Act I: Ascolta! Se Romeo t'uccise un figlio
I Capuleti e i Montecchi, Act I: Ascolta! Se Romeo t'uccise un figlio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293b85a71ceb9e0a59a773ed15f9ab92ab929b9117c95d10b8b5c100a5ee178b. 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/GBBBC2400366.
Puccini: Turandot, SC 91, Act III: Nessun dorma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4868ae57a8efacf49fed3a94afcc96728244158a2487ee7710f4df17229797. 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/GBBBC2200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e766b780414e82b90b0037fe6f280bafc2d582f2e5dbe0339120fbfee95329. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBF071700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4868ae57a8efacf49fed3a94afcc96728244158a2487ee7710f4df17229797. 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/GBBBC2200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e1da36e19589019423c7b9965e6e6c6b3a645c88af179d06798f071b7405b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEN961801170.
Carmen, WD 31, Act IV: C'est toi, c'est-moi!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f341c732ea24ce44dd9927937f983c346c7b762b5fa5248d4444f068cfb1a2. 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/GBBBC2200330.
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
Carmen, WD 31, Act IV: Viva! Viva! La course est belle!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc1f4d1e898143dbbb4e1f3230c4a0304d39d165367fd1a81e50ca07c145b0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBBBC2200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3a7e2cf77e604b0c725fa3a427ff7f12ce20e195edad124ee1084584daa0c0. 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/DEN961801100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e271c72e596a90f43d6d2987a84bc9da98ac28c939b30d65b9efb939c6d62. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEN961801210.