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 0x0947db74f066bd617159451fa909dd027a1a3391d92c84261fd8c466d09c9d38. 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/0558ce91-2bdc-45a1-8d9d-86362c1292b3.json and https://artists.proofprofile.net/proofs/artist/0558ce91-2bdc-45a1-8d9d-86362c1292b3.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 0x522762144eebd4968229ba52b88a04ad6a65783e0f43e026eb2ebcf98f51c38b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRE018300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dacca4f611cf1d5db86799eb978db41d5cd899ad54a3b71558a946fff517449. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GRE018400333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a21e43686a9df499f9a966bc58781096f0313fddb5811a16da80c8b13bc47f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/GRE018600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e3966e3da536d952b956f8b0d6cd38c6ec9785aaf3a7fb8eea7a03a39a9ad9. 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/GRE018600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd92821724b9bb08a49a33ae79bab9cac3b7259a45b511046dd4e48a3988c59. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GRE018500388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dfdd05c8095852901162421c774e0ae278ba52f29c368cf0d9713fc84996f0. 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/GRE018500381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777e8c8a79ca403364a51bd9109ff394805848966aa09226c863afb36fa8825. 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/GRE018400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559791989f31a4b2002ad453bfd37e2cc6ba9aaa2e3bda11c937fc3a57fb35d. 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/GRS018900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98334387d1f86789b68db9c4a398f60e92418328c6787eed7cfe68abefecb982. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GRE018300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecbdbe8cf06c0c0d609e67a3beebdba26361a7e7a2b354327fb60bb31b6aa59. 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/QM6MZ1747873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde2cbc605a4f39834ba8108038675124214e2942b9b5fea55dddcd0a2ed8ca2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6MZ1747882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11f945c1acdda45896128f9e22efe57f57fa8a754fbf0ccadb1b328f45f6166. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/GRER10600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465509e687dac97e395bff307b4bafa0a4c83977e97f6c23f1940ba3272d745. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/GRUM71302102.
7 Megales Epitihies Tis Pitsas Papadopoulou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610fe0145bec361cd3be9c582bd8f36df8012dfacbe0e1d7188f66afba98e762. 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/GRUM72100266.