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 0x02d05f6ebdcc3d6657f4ef03a6d77ecc43c4cf12d75a3af7453810f79ad6e3e7. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/954467d8-f8d6-49c9-b249-a118b15a9904.json and https://artists.proofprofile.net/proofs/artist/954467d8-f8d6-49c9-b249-a118b15a9904.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 0x74bcb1780e87ef4b76754a79bedc781fecafe155d56c53f7a8f1e63a204106c7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES21S1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bd2812be0b4f0a98705be3b31f6011129cca0f8bbb42fd9aaa12478718a141. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ES21S2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc4cbce80fba2301251ffa793b4a16e30738f14433104ae32b35d13e332af13. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES86D2100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8ef7e3b24c0d2fe3a0972ee0f344c669e0b03c556797d81b3848352e73d33. 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/ES17D2101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7504f84d6b7113c3442a247b0ce56d569b24fba1d1835d79960d82bca0b180a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES17D2101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4faac479e6c98f13bf93344160a263088c447565d97b4a9cc2a7b0270b75c34. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES17D2101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8fee1c8d4cf532ad1f7d66c6a9de760f1bb35ca7f925ac87c9cfb50c066d04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES17D2101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c86274a3623aa493e6e582406d006173ba8ebe0d86a2516c1b145a43ce9ec. 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/ES17D2101435.
Torna a Començar (Un Estiu per Esclatar)
Torna a Començar - Un Estiu per Esclatar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081a6125059e1f96824e05f1ad7018be587c0c53ced697d45d57bd4ba1d3736f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES17D2201724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb130843d5eba14afc487eead86eb2d937d8ef98af2bad2498dd3aa4b3a3bde7e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ES17D2302000.
Un Estiu per Esclatar (La Cançó de L'Estiu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb130843d5eba14afc487eead86eb2d937d8ef98af2bad2498dd3aa4b3a3bde7e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES17D2302000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64169ff28a4620086fe71c3c7383e5c941c83953f9f3fb120853da52c47d528. 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/ES17D2302208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3703bf87c0d6d84b3cb0bc8ba26c99aa841710547b4949454a42b8d106a9b38d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES17D2201946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9024ee6ef77a8e516b6fe54c3066aa55316cff4d0e3872e56ac3320cfd03fdfe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES17D2402591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d11dc4afdaf95858993b45dc993e112f97c73416e1b7ecce97e7f8daec4ba. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES17D2502744.