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 0x90d9466c6ea03b2f79abb81581f7a15e3762db29ec2cca5c991c8f1addcfa9e3. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fa81713-cc50-4c5b-a71c-1be3fa321ed4.json and https://artists.proofprofile.net/proofs/artist/8fa81713-cc50-4c5b-a71c-1be3fa321ed4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
עלייך ועל כסף (ועל מוזיקה ועל אלוהים) [Synthesizer Sessions]
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 0xabf0dee00df08359572a72ae24bd9cbe3e68941c265300cfd194d7773ec6f528. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:19:42Z), 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/IL6192304862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19010a7f9fd31d1a679682b7aaad812864022eead494af7704141801307fb7c. 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/IL6192304863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51270c62878dd5ac9fea6736d48024494388d76f8589b4189cd7e0426af3d51. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/IL6192304864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b35c9f243e14324bfc241892e451a639f6d8233ad08a1aadb84b94bc4f2d3b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/IL6192304866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade847b861e27a9a448cff239a7ea3c5689d176976ee4c84746487e83404bd81. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:02Z), 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/IL6192304868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a5f64ffb41ffc0676abbff375fa5cfc8637dffeb274c6161bf9016991ba8cc. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL6192400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336939163bf96837541bdd84610758bc3fb1936ac47ff8b7ed3c363f5849b3fe. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:56Z), 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/IL6192500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28d67c56464d84289fb0396f06362ba610268519eb021c684f48c362f2355e. 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/IL6192500562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb593d2d4d2589117cb77283e9598e29911041ea23123a7770e312e5f01c6060e. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:26Z), 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/IL6192500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e6d8c44343df0865a29b3e174d7959f41fe8d262f70fc4a00e880a7bb0021. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:47:41Z), 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/IL6192500564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016a78c54224c5aba9ae6cff8979f96e3961c0812ea68711696696ec3d379fff. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/IL6192500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2f429449ba2bf624f6daa885a47e372dcb5e8a0b37a5043a7cef1efdf6f77f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:51:14Z), 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/IL6192500566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28d67c56464d84289fb0396f06362ba610268519eb021c684f48c362f2355e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IL6192500562.