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 0x946efe9bd88950b59c6bb90d28bad5016e91e03c409447c453b4b780dda32a2d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/739499c4-69e6-4f46-a55f-b717225c138a.json and https://artists.proofprofile.net/proofs/artist/739499c4-69e6-4f46-a55f-b717225c138a.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 0x66ea0276384c7614b0b719c4f46e8dd2656bab5d07d2cde45978e973adce4450. 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/IL4291002327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28d1393bf62944b42e634b984522ac1f4541a1ea590bec81894b418442586e7. 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/IL4291002328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf77bdba86bf5e1f7d63711358ec3a63b7804b8628b56bc527408f3f8f547ff. 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/IL4291002329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c423939bfd82ec588424438bd9db069bdf80b34a48dd7f8b8dbdd84fa55a0. 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/IL4291002330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2700d7252d4e18f2f9d84b771168e0d82edb0d128821710925dcf86065ebc1c8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/IL4291002333.
ויאמר ירמיהו דברי הימים ב' פרק י' פסוק א'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe671b8cb0f903a5e2972580843635e6b76ba78803c00179f2c7f6ffee4e6d7a. 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/IL4291002334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72bedbcd6fbaf2f9a9551a6b4e8084030cf6bceb8d6b1b3a91fbd4c141daf53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL4291002335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984824a2d466e52e86b6660b2a9d9bca63b7c74bf5ed94fede2c3f50f6a26553. 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/IL4291002336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4829420889a337c361ad4ba65085442fa380aae410360236b9ba40fd4dd0b64. 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/IL4291002339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1920693d7a40c5e111c247494529422a6d8009e204f4e0653101e53749e0a9. 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/IL4291002342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e90e5dcecb05921a008f34795e5aa5bec7fb998e6d041b7185a1e1c6d095c1. 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/IL4291002343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34443521725be0675e367c69081eb6247e984bd33be638f516f6c7cf4a5af89. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:53Z), 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/IL4291002326.
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 0xa28ea5e650b66113ad4539be31f69d28d1cbcda0c1d4d91a0f044f30e1e122d8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/IL4291002337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878bbbd20b1cd9c39265c451a19af44e7031b1761e493bcd5cc0a27a6db8a1c3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/IL4291002341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7f8e524d6579830bab8ebf1e6e667d95b32cfeac6ee0ce9ad8455af1d43b5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/IL4291002331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf837c0dd5e22c0ea9cb4be4172b426375f46e0aeaf9c08817f68c13a5ed7c8e9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/IL4291002332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98875e2b424538223beae808fbc059fc7d6375096accc366c9b9353b7c853ef8. 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/IL4291002338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3b79a628b546868de67325408c917b0557fc6b126fb683148d59f32afd5d09. 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/IL4291002340.