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 0xb6ff1eeb37f6c821fce7b57b5ee6ffd068443ca72612f77a91c0195259ee6c0e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b3ef869-efbc-48ee-af0e-2d307f0f258a.json and https://artists.proofprofile.net/proofs/artist/5b3ef869-efbc-48ee-af0e-2d307f0f258a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mascagni: Cavalleria Rusticana/Leoncavallo: Pagliacci
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 0xed0532d4b67ff15e4a21c846648aa68a992c483c7537107555f3754c6852413e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBF077740902.
Pagliacci / Act 1: "Un grande spettacolo!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b87087ebf5b04fbd7e073c4993a86080af054fe73faa8c0806b5ac17eafd2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBF077740903.
Pagliacci / Act 1: "Cammina adagio" - "Derisione e scherno!" - "Padron! che fate!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77637bb4822e69022373a4bcea7aaba8bc58c50b01789d96408ca25e3ee29969. 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/GBF077740909.
Pagliacci / Act 2: "Presto, affrettiamoci"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa92def20dfe38c196149e5930c3208f7158782560370ce468576c9e6e60d79. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBF077740912.
Pagliacci / Act 2: "Pagliaccio, mio marito"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db3802110152f3757cc21c19b0c97df849b9ed0da46e473ed6228c3ff7acc8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBF077740913.
Pagliacci / Act 2: "E dessa! Dei, come è bella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c95f239b524363a2b7d39f69c293cabb70495918db439c06637cedc1e474f89. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBF077740914.
Pagliacci / Act 2: "Arlecchin! Colombina!" - "Prendi questo narcotico"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006ba3b4df44d62f9950e83c3ae65b74ae81db9123f47e846549fc901b4f7a26. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBF077740915.
Pagliacci / Act 2: "Versa il filtro ne la tazza sua!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd884b09eaace0dcab69d87f06f310db6fe9c8a1f56f48527251ae8b08a5c77. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBF077740916.
Pagliacci / Act 2: "No, Pagliaccio non son...Suvvia, cosi terribile"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f467aa0311fca71ae0c3e9b7c3fa10ad645dfc82f4fd707aed40dde6c213aff. 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/GBF077740917.
I due Foscari / Act 2: Scena: "O patrizi..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af2505302595c9a92a445c27bcf67ef80696550cc17028c400fe9e97f2f8b18. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLA507511026.
I due Foscari / Act 3: Scena: "Egli ora parte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc8f410a6be24e9894de6d02d1d06dde9cb13c999e34f8f67062e3cb761562. 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/NLA507511032.
I due Foscari / Act 3: Scena: "Che venga a me, se lice" "Quel bronzo infernale"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c631448fd0617876476f0a3064532e9682acd490c0e6b1a7040893d2ad62154. 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/NLA507511036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f467aa0311fca71ae0c3e9b7c3fa10ad645dfc82f4fd707aed40dde6c213aff. 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/GBF077740917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc722eb0ccdbcfa5b5db8b2acca79c4ad4c5f51a50202fc285a92b5462c1679f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLA507511002.
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
I due Foscari / Act 2: "Queste innocenti lagrime"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa68aa1264617649e62ddc7ba229266979f653e254669948b446a9ea4071199. 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/NLA507511027.
I due Foscari / Act 3: Introduzione: "Alla gioia!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be53df08812b82e6d1a83eaaa550f8ea49a8e30d0eb129ebb51e4a62a4e49d6. 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/NLA507511028.
Lucia di Lammermoor / Act 1: "Cruda, funesta smania"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6161b884eca40f23b2f389818a3b5456ee5c28efa810c6b787e655254a8f3df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLA507509903.
Lucia di Lammermoor / Act 1: "Il tuo dubbio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea49c9a04ca19d8fe30845fc5c71a40b133c713800855100cb47a4486bb3cb2c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLA507509904.