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 0xed26dc9053fc7e989e7ddd13fd1a6f24e6649c5db66d7388f3281af9d5c99c4e. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81cd0298-92e7-4716-9848-14332abd3994.json and https://artists.proofprofile.net/proofs/artist/81cd0298-92e7-4716-9848-14332abd3994.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd86710f45bad406e03306e55c67f1f639b2c8553afa52938bdb0180293fc037. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUC591900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593bbd5f834b2b72b7640f826c1b739d65153d6bfffef25a2f0a623c6308c4bb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HUC591900158.
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 0xa1d02568934ebd8ebb20aceeb91e06ae8087cf0c337a1d4b4f2f568676add9e1. 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/HUC591900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b0a38d93f6d9d7302d62466234b16305ce6ac2b02bdba9492cca4c4e7e891. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HUC591900165.
Nem! (Az Eszperantó Királyság Hivatalos Himnuszai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f414d49f063bb3ac2672167804c7733692739dd7615e48f6b79d1b1564f746d. 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/HUAE11800365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1139ca81e1cf5475735a4df16d5abd9b5ee186d0b9b3b3076f0e9b460bd0e6f0. 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/HUB281207462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25036f4ea657979ec9073948f2014555b3075e83faa4ce0f8e40e6a579333f22. 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/HUB281207434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1025481db80c0aa7f036909952332f38bb42c41de92e5b71f7bd670bf8d53d7. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HUB281207437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86e35a622579fa5705c05064e185e13f6714adeeea7bac7234133c8adcd2b51. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HUB281207440.
Halhatatlanok (A Politikusok Szerelmes Dala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513cb8b057c0502531c41a925a155de0fe8dd510e491ae3f857759f5b22476a. 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/HUB281207428.
Buszsofőr (A Kiábrándultak Szerelmes Dala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e96e3860c1418b200db2a257adc6f34c80c633662f35aab55ea33dba01f132. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUB281207424.
Ne Aggyad Az Agyad! (Underground Katalógus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88529997f8f3a7245461a7ff8231045549cb44e5d5a6c5bf1bb5bceb6e0d399. 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/HUA030900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792465e219c297a8a8e5ad6e2ad15dca5955ca2a6225a1a4f17169184cedb45. 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/HUA030900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f1453d11dc01dbc4c9e13f5eb8f79032df9a633d031c171c6586073dc01022. 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/HUA030900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e632facb21c6ed0e9c0e1e93fe133a75ef7d5717c0a1801276e5df9687ed1. 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/HUA030900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e0c10fbc6e1d7101dd4e4f9ba9bc1160abd1e54681bf94b312017c1d3c0190. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUA030900148.