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 0x952a83f9f16bd6c336a53e20eecef2e8d7ecd8a367fa9d77b7f228c055e28381. 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/f98de617-fe9a-4cdb-bdba-c49afc4db5b9.json and https://artists.proofprofile.net/proofs/artist/f98de617-fe9a-4cdb-bdba-c49afc4db5b9.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 0xb994bafd3550395da4fbff314c0dab8559fe4598616254a8c5427d64534f8e78. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEXO42490783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7933d208ef4634773643de486b2e837c9e0f5d802457a4f46331a06897f890c. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/DEXO42490790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678253d16fe514e7a0e7e0c9e240428ac7f18e7cd25601d0a75e3a2b56e45e5f. 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/DEXO42490799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687c6d936d60e95ec7a3623a384a53ae1e433fb76a22129c5e987a1b30dfefe. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/ES7580502142.
Los 5 Latinos, Vol. 2 (Singles Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328e31cd0b4fba1fc5e079894420f4348ca4a8071fbb5d50582df8514e3ac8d1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ES5299300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b0bcf8d8124a84109d267b2a0915e798fd0d6a2927e4ce7bcdb69f7d7b8c9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ES5299300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff4f2e669245197eff1d7c32ad6b1bc44bdeb4d75005942ade33fefc906f92. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ES7580502146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de68da40793e70915e8bcb37bdb2924c7609153601dd26e7ab129df19618a01. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ES5831302116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808a911b27bf8736b9564ee53183c1d03f7104a72d0053842effe57255bcee3b. 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/ES6601405018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524d8b59cf5b4ab2a9e429b27929ffc08b18c1d5b96d652353c2cf1fcbf7ec27. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES6601404994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb98c5e6e957b44925eb53ccb4dc6a7a2c46d175e30ee7ec4b09f5fd7d4bfa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ES6601405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e253efefbbe38eb93d906e58c40ef4c344ff1e0a40f71525aaf91757045376. 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/QM6P41532420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57a355787ffa8b8f350af4e09440e1b09d5172e54b60c2d65e4105e0ab7493c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM6P41532421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4ad1b4a34f9cbf6b9cc968510c2e5e43cae3296f5ab7a02aa7d55a4a73679. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6P41532422.
Por siempre los 5 latinos, Vol. 1 (Remastered)
Por siempre los 5 latinos, Vol. 3 (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142de318b91ed59f6ffe5e6c5a520610b86cc3132330fc24e4b9bfb9b272a4d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES58A1701373.
Por siempre los 5 latinos, Vol. 2 (Remastered)
40 Años de No. 1 en Español: Los 50's, los 60's, los 70's y los 80's, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff4f2e669245197eff1d7c32ad6b1bc44bdeb4d75005942ade33fefc906f92. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ES7580502146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7dc2aadddecf580c0cc2eaa1623121116d8039f881b4df56788defc4581407. 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/ES7580502141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae45206d3ea80ae113da3b46996132066c88188f9f9e2df822bb2be7499b399. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES5299300072.
40 Años de No. 1 en Español : Los 50's, 60's, 70's y 80's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae45206d3ea80ae113da3b46996132066c88188f9f9e2df822bb2be7499b399. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES5299300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdcddb566c5dc9ee9f583a16d1128a52c8a784300c25614eec802692d70a01. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ES5299300064.