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 0x464860dc98053f842a4575a4587b56df241e79e86313deb6e4df0fd3ab2e42f4. 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/d544078d-28a5-4acc-9a74-fc171d6202ad.json and https://artists.proofprofile.net/proofs/artist/d544078d-28a5-4acc-9a74-fc171d6202ad.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 0x261e4c645176a1a4f351a55a76a58450c215e30737dff8823f4a114e78e93379. 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/ES5152200485.
Estoy Contigo (feat. Ana Torroja, Andrés Suárez, David Otero, Funambulista, India Martinez, Iván Ferreiro, Maldita Nerea, Melendi, Rozalén & Vanesa Martin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cff3667f77fe7d5432e2fdde81597cd9bbb0a58a88d0dc3c2eb0cbe07271a. 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/ES5021702128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b892ba8687b07ba678178ef8762bc898f313d79f9a89866a4a5fd33521f3fa. 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/ES5021900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585ac370587cf9cf683e83b094aa832c9848cd6c40906a34ab8c3bbf93c5edf. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ES5151601844.
La Voz De Dentro - En Directo En El Estadio Olímpico De La Cartuja De Sevilla / 2016
Tour Bailar El Viento (Una Noche Olímpica / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b39fe501b1e3ca208514fcab78f8c0a7e553dfdfe4176350420abbcb2ebb048. 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/ES5701601151.
Despedida y cierre (feat. Manuel Carrasco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51ec69bd4501a205dc4e0b7b871b78e30501a7c5bd878a15025fd0bb83bf12. 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/ES5152100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c4138f248a68484bcff88cdfa12a5e761399fe8fa54de1b486acb15ae162c. 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/ES5021702344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c4138f248a68484bcff88cdfa12a5e761399fe8fa54de1b486acb15ae162c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5021702344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc2322742084de10765eac5141bb4cd17caf9107c6ce92c3439d170ed7f4cc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES5152300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc2322742084de10765eac5141bb4cd17caf9107c6ce92c3439d170ed7f4cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES5152300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67c4e1b33a73733b38d4834b950b27d3f2d37991f8dcdb284abea66c431efff. 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/ES5151601839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805cdf1bc9933b3038d36eeefe7d4d361bc8704ac0cfaf583d2e969f88cd8699. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES5151000688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fa1542453b0536ccbb2f4a8965a9e50fc3dd5546f6b415817a16474f0191d9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ESA031503755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cb70ea3b69af7a6801956779a7dd9bbc9adb6eca8406ca67affc6252157d49. 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/ES5151701832.