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 0x0fbd62a88998e36d6862e4abef332e9673e4a7153e461757e420d9a63caeaea4. 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/3bb5eecc-8693-4fb9-b692-fb500a99f58b.json and https://artists.proofprofile.net/proofs/artist/3bb5eecc-8693-4fb9-b692-fb500a99f58b.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 0x61a2e27416b7a4ea3390aef68e24ebd1eec4d1877f22a735483c76a97b33f5a5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ITI021100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c2308c5a206807db455c8f978db7f3649c690b1a927d38ad90d4c863c90a56. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/ITI021100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4892a50d08f7e7900d8bc0a49d9540558dd9574db6bb00398a198b2d85c04ab. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITI021100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20e6f37b883f159782109999020385766b629fc6a4cf6edeaa2306a52aca11f. 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/ITI021100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0b1e0c4a20e9165f092424d93037da85a93605959eab2b6d5e60f5a36b531d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ITI021100448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda172af1a6ed7d16ff74a525581be46d29b63d1660c819f9adbcc5c9d0b7567. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ITI021100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6316858b41b7c1a8696c32d7af5c47b0e15da53e6a7003997e51cd2f3980f8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ITI021100455.
Let's Christmas Together / Santa Claus in Coming to Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866040c0b238e909f068674ded01370390de400ac81124cfb913ca1b4d8bf8f2. 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/ITI021300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae2c389deb16aff8c4fad669a1c4af62621c3659e826496850cb065752f977b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITI021300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f361f8f799c590089add6976776086c2cf5eec628c49e845294b1223ceec96. 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/ITI021300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7aad5357a9e19e330a812bf565aff494f84ab823c0de15de2f775d1906ad20. 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/ITI021500393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679f6b5042f5d93bf597e7af422715c239bd4b565375194dccd34e627496fd37. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ITI021500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38570c63c701ae10f068699e328f8240cd2e0630f78b5c7e10b73edc18afc8eb. 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/ITI021700436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aae5c0d0bd475b854544d95c28b07d997f997311bcb8338a09044cfac88698. 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/ITI021900163.
Italian Lounge, Vol. 2 (The Most Popular Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420d971b9a28c1d5e9be56564818a618c310edf9a4d232ae02a28bff9ba46e4c. 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/ITI021300141.
Italian Restaurant Lounge Music (The best Italian Songs to relax for your lunch or dinner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499bdc1542e43e56eb530f8851f30cc70cf2ac7d4109bc0d2cf2090ca6395945. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITI021300140.
50 Italian Standards (Le più belle canzoni italiane in versione chillout)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420d971b9a28c1d5e9be56564818a618c310edf9a4d232ae02a28bff9ba46e4c. 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/ITI021300141.
Italian Lounge, Vol. 4 (Beautiful Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499bdc1542e43e56eb530f8851f30cc70cf2ac7d4109bc0d2cf2090ca6395945. 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/ITI021300140.
Il caffè italiano: Roma (Italian Lounge Espresso Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba5aebd6baa18fb1b706b802e4afd9357c42a78c9cbf966727130f52c06a034. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ITI021500398.
Italian Lounge, Vol. 3 (The Most Popular Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68971bc4c0af638d5c6320c04bd8da664f523599bbbaa1ed31694c0ac15c2681. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITI021100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0810d68ba1b05ccca8f808c989d0bf4630c07b40a84426a34be541dbdc0cfc2f. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ITI021100452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0810d68ba1b05ccca8f808c989d0bf4630c07b40a84426a34be541dbdc0cfc2f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITI021100452.
Il caffè italiano: Bologna (Italian Lounge Espresso Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68971bc4c0af638d5c6320c04bd8da664f523599bbbaa1ed31694c0ac15c2681. 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/ITI021100447.
Italian Restaurant Lounge Music Vol.2 (The best Italian Songs to relax for your lunch or dinner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbd9a10f91893147b2868896ff7018345b31c9bebcf63d54fb6851ea421f5b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITI022000158.
Bossa Italiana Vol. 4 (Italian Songs in a Brazilian Flavour)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbc7dd822061c2906e9ac0d901e66cb66adabce39aee51436ad2cee2b1dc974. 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/ITI021700450.