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 0x20a7459950394331908029aa3f2b7049bc23c6fd603bc853ba4fc9f5e676d6e6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25e6dac7-e462-4ada-8ac6-55b63e88b885.json and https://artists.proofprofile.net/proofs/artist/25e6dac7-e462-4ada-8ac6-55b63e88b885.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 0x14eef23ed9ca655a2ef22d49d3549671b2799321d882d8aeffe1ce0e2defcd86. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUA631400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2b636fae8a2e01253c2178ce1c1a46e555246ff33ec2f5b3b5197e3d32ee23. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUA631501613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8ca668e7cc9292332a7e7e0dcd9ebcf60134cb5f9c548bd4ef0bcde27a1ff. 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/HUA631501616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74832f8dab14e9998dab47b060acc76849cc2fd8d9ea55b4a3809e6912cf2f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUA631601257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c28fe8443b4892c113e4d60abc74ff60e0ebc19fb4594079f0bc2810a3b74e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/HUA631601258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d88dacb2420d7ac25ea379712c56c548353c52e90c35ce6b80b572bd4d3391. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HUA631601265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc7c59e99e2f333ba9807e2bbf4dde0412b8744375ae7fe11b9a4402960e19. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HUA631700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888ee020e06090758d4c333d80f029b75360473d9261637786f0671f8a522514. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/HUA631700464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561a86efe1bcd2a971f04c0174c48e35ea3dca9a5689000ba6f944e9db55016a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUA631700469.
55 - Akusztikus koncert a Kodály Központban II. (Live at Pecs 23/11/2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7959e2aa84cedbc68eb37d3e97b77b251db7cf30fed0490c9fb940e90de0eaf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/HUA631900158.
55 - Akusztikus koncert a Kodály Központban I. (Live at Pecs 23/11/2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de51b502f0f4e3bcdd52a8afd7df614a62c197012ba3ab3b3ef9dca034bbe42. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HUA632100550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d13c969243056324e455bfcbab8ae5839c60171ab6b5a619fccbcb673509367. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUA632100551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb79d73c089acbba5cf39f178118b24e7681a1d024daecdfb1a79692112940a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HUA632100556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aecdf04fb61bbd7db3ad40f70f009db728caf1c3877ce8b74ad3c4a6daf4180. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/HUA632100557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef62a85ec54b6db513683f418a57c35c151d066d65ce3938f0f6883f03e9b67a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA632400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75d3dbb8db7d4ef319043c691eabb572938f14b23a7a21973be43d0e19daaf9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/HUA632400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd027bd29adfd6896973f2b115a14ddd925c2174b4db7008c1d0c2282c60273d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA632400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49532788014420565401747de4b60527e8c340e513c04bdd27f34ef15290d311. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/HUA632400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82726c696c64a0cf0924dbeec93f2829d1db9423a8178eecc01c8f55450ef92a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA632400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428f2351c039bcaf059ba23ce60fb3fc4941acc0222c21de58477c3b89374337. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/HUA632400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22b5ef30fa68520c7ca7bb3acfcc445364055eb19ba27df914e207950d501d6. 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/HUA632000609.