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 0x0a2de9276375d3762b59c675e57a1227dbcd9621488dd1ee61804a0c1d93b2e3. 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/cc42c2d9-2d32-4713-9281-12a6bdd4ba74.json and https://artists.proofprofile.net/proofs/artist/cc42c2d9-2d32-4713-9281-12a6bdd4ba74.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 0x0bb9fbdd9df1400d215fa06d777daafffb202b370f973afd4c35daa150115dff. 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/CLEE20901753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a823d99d44b5683fa9b33cc0ff5bb57b72eafd5fdaaac38d7876600efeafbe8. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CLEE20901766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ce8915426cb1bc5b29072b6bd7257985869ecfaa3dafa733aae491ddd2fa3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CLEE20901767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e38a9afba30ec70710e41517186ec2b4ad6e0b757851d4d6cd34d35c492fb6. 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/CLEE20901770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526bee544541eac9d6520e21e9fa5224c61b9308e78f3e3290b7a6e463466dc7. 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/CLEE20901771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057008f936e1fb988d65645187527531b113f95a9bb5ad99e8400a42b4ab1f98. 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/CLEE20901773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea46fa6236ecdca5cf5006b1d07b08404a44923b69b4352e1ea96463bbac923. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CLEE20901769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab65203dba89b1a9b44fa602a5cdf92fe3b957cfeb9e2301e21c2c7be6c04c9. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/ESAAI0257010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206548ab6553b4cdbe91112da551af8113c075b20f941f3d745bd1c342780ac8. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ESAAI0257011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec94da65aef8cd2abb4dc222a935c336eea16fcd0908485042d6e3520384ea07. 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/ESAAI0257013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcead343a150b6fbb2c162dc03b0483306675d4f8525b04a927671d8a59ba6a39. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ESAAI0257016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf377fa8f0322ad3a58802a4924e50b794e3f1b3bc40a1542bcf70849c0b34415. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ESAAI0257017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73392a87a6997a46881362265335ea82f33b52b1b52074eb4a08e332a9e86981. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CLEE20901759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256894fb47a256573386082ff33e230988b0723cec682670aa382cdf753b7605. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CLEE20901765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f357e63111e76bd87e77fcbcf45f92bafe619b884b0666dab34f91723b7c80. 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/CLEE20901768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e38a9afba30ec70710e41517186ec2b4ad6e0b757851d4d6cd34d35c492fb6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/CLEE20901770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993d60cb93fb02ae7bbeb6e5fe72cc597c599ba037c3cf22b8b616143ff2dd05. 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/ES71G1863924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e35c45d5f2c5f845fd05974ca70d38a740e34739190cb8347d7651f09bb7dd6. 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/ES71G1907155.
Inside Looking out (Radio Futuro) (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b48cf83358b99c2171e37b92fe20543f9ac30091389050c77578bcdf827e57. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2429887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a397607e62fa699d013dddf8b33fc3e57bd8e8ba23f4a7f79bf8d1964c9d94. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ES71G2429889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2370bb83d9e3360d39c715e7d355518685e94f83fb29b384a387c9ad3eac5703. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES71G2429892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f6b4d61b2a67c71f15f3fa8d4744715f8f44f4b4798e88cca0bcb4a1fe4ee2. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/ES71G2429893.