"Layla" is a song written by Eric Clapton and Jim Gordon, originally recorded with their band Derek and the Dominos, as the thirteenth track from their only studio album, Layla and Other Assorted Love
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 0xdcb5840d426b25cece73de5490345292a391e00662f8e7b0450d3bfd120dd0ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fee6f382-e21c-43e6-9de4-682f12f63db6.json and https://artists.proofprofile.net/proofs/artist/fee6f382-e21c-43e6-9de4-682f12f63db6.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 0x908a291f44ee7dcca9bc7c14c80f69c919ec26de7d6c33c7adb23e69df6e2e28. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DELJ82078676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa934fcfb5872bb0b28abf5f6f18a85ee9e45d6694d5797012b5d8480b8f88957. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZC62161565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73477797a6cd8f8e54c1d0a1eec4153e1330c8643f5a195cc0288b252ed6518b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEZC62174862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37ae9439bc4dc5513d3ba610984535842076630ffde149f152671cad4670394. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62174864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd236a3d17eda2c4d93d8fbdb59480f5efa6da8b5e110962975aa5abc6858e0a1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DECE72203123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c67266a043233f91a5eadaf3893796ce026a4e48ca51dcb9157342b9c59f08. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DECE72301455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e42a94b96d9e55967c067f9c8406c7392a6e356718888cf8dd1e68299fea52. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DECE72400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96619abc96c91c5a3ba2093e59b27e9d2d971ebc77c1adbe93d4b0e6d76d152c. 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/DECE72400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1709383b61bc8874b800c8c0adf450f1ce71bfce5b9280e018d9e794c484e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:56:31Z), 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/DECE72400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260403076a3b6695503d90120afbcd5c0e523bcf4151791bf526f769efa9ec77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022370558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe096f494a3225597c3b169eb4bf3debb1373626fc2975ceb4907689cd867584c. 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/DELJ82069023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc068c71be17863bc7c9e70a7559c9146c3486837dcae318088527224ada7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72105077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96619abc96c91c5a3ba2093e59b27e9d2d971ebc77c1adbe93d4b0e6d76d152c. 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/DECE72400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c67266a043233f91a5eadaf3893796ce026a4e48ca51dcb9157342b9c59f08. 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/DECE72301455.