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 0x38448acfb862bf507134b84e9fa8523087fc1961cb8832036196e91562be4ae7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff6578c3-faa1-4d9a-be26-ec86f5721031.json and https://artists.proofprofile.net/proofs/artist/ff6578c3-faa1-4d9a-be26-ec86f5721031.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x2c7be09c6aa4dca86b07e1b61d8253b4434c7c7e5adad2699a2e312efd89d427. 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/CALC42021151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a2d4a1b81e0e80795fba1c8f6a73230fb72084bc9c6f65c27cb78f0ec2c55. 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/CALC42020321.
Ercole sul Termodonte, RV 749.31: Zeffiretti, che sussurrate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5867c56b85d0afc6f7945ab0da4549ee5cbf7250d8313143bf57007e65f5f331. 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/CALC42020322.
Il Giustino, RV 717: Vedrò con mio diletto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699ae0e22694d5530fd30015607aa97ae03130b05cbb3a34cb804f78cdf37fe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CALC42020324.
Farnace, RV 711: Da quel ferro che ha svenato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6876b3faf9a86555653cda564f06f710085f69f68f014c2291eddd41934d4. 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/CALC42020325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb682773c8731ecfc23acc24bb43d521eeb7c12328e9560acef3e6ef9ee8db164. 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/CALC42020327.
Ne me quitte pas (Arr. for Chamber Ensemble by Grégoire Jeay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a58ad344c14910a4e3a70703135cb819f34144b6d157701a4ae7acc1e375d. 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/CBBUS2407012.
La nuit est ma femme (Un opéra d’après Jack Kerouac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d8fbf1e0fbb9868e7fad769b709c1a0d9c73f4d2aac26f00c7c2534d2bfe1. 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/CBBUS2407001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267722e82fcd2ab811659a85f23d3e2b34b7ebd2ab7823c090c419d6d508238. 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/CBBUS2407002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb318541ba1c3c3c95a95827a5740e2fab326d9db89698c08f9d7ef550f19ae92. 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/CBBUS2407003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d295762641bc54df8579df1a5d892931853691b20cfeb63cd0819e3daf1693e. 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/CBBUS2407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5dac91dc830aa2cedd8e7f0aac38d9e47b2e92045cb60cb6a40b5baf3595bd. 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/CBBUS2407005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b127a8d4619c9d04539bcecf423d1da619f2b3fa009b35b503f92a573b4f65. 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/CBBUS2407006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee6ae809b02e92c0e7504a8269a4e6edee87cd5c73a623351d2156d377a9ba. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CBBUS2407007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba29a776496ef543b36fa354285c563afe92e79946893a9aac11a52ef2d0697. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CBBUS2407008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f10280a9bfc2febcadc8c6bd6a0c8ae6887ae081e4a287d71a64f1a0a41a82. 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/CBBUS2407009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f0b395d865edf045373f56c18e3ec16dbd3b812f1676c9cfdd6c058a1aba5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CBBUS2407010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233885e281daf49ffb1da60770b4462de9d6403f8e20bb7605e19ae13dd6db8a. 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/CBBUS2407011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a58ad344c14910a4e3a70703135cb819f34144b6d157701a4ae7acc1e375d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CBBUS2407012.