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 0xaf5102d5feba8c5132ec22d80095f794b8ad89eb3bfc936b90087bb9fac317d2. 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/7f7db510-41dc-4e08-bc9e-bd5441595a9f.json and https://artists.proofprofile.net/proofs/artist/7f7db510-41dc-4e08-bc9e-bd5441595a9f.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 0x5561552661b67a146acf5ee8d5a94251a92be0f9a47130579a8b8a06f738586d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBBFT0400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b93efa08eb6578198f4dc76a507a042d027142507803f78fa3451770f29b8f5. 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/GBBFT0400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a88b09c9baa2f63419059f408f4b14e87b1229dba05c9881e51d819a82605c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBFT0400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dca9adb61e9d7d6d681b3f96b0a68e6fd056271521023cbf5b5908682b25ba. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBBFT0400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddae9d752af8ab1e453e2e7ce546f69a9996378e8c45989f19137377c8568395. 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/GBBFT0400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e8cd85664fe99abf4166409a6ac0e2c2452fda2b1396ae68723169d36f7dc9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBFT0400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd405c7cf58befef9e15aec7700df7f60740478c2413b5795925ed65f13e462. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBBFT0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451a5b98280cd2fcb0663fc88fa83057b51c28699e7848172fc96d12e0760640. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBBFT0000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc950dc7d2b03af7a2e90416d7349175feb957aabd1ae1064d0fbb0581f3c110e. 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/GBBFT0700022.
Die kubanische Auswahl, Vol. 1 (Der wirkliche Reiz kubanischer Musik)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265247682122964ded6ac081a9b7c2510433100c0c6cfc889725ec10c804d1bd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBBFT0400135.
The Best Of Cuba: Ballad, Bolero, Romantic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8303c35c212cfafee4dfd55bf0db58dcfaeebfd6ccd8eb4e4e5fcbe4706c9a8b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBBFT0700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd405c7cf58befef9e15aec7700df7f60740478c2413b5795925ed65f13e462. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBFT0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d043485de5893b5bcd78eec9623021fde97114c3f020e354c9c2c5c8ac9f5e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBFT0400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95706ca831b99c056ec7b424960b97c1cefb24ec97ed1e29c6b9013d2055ce1c. 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/GBBFT1000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561552661b67a146acf5ee8d5a94251a92be0f9a47130579a8b8a06f738586d. 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/GBBFT0400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4993bee5526d79bf588f05a509d2f8967c825327fe9d0c60a4181e1af17a3589. 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/QMFME1579333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1b6932d10c1c202e83edd4a2c66068c362fbba219a54c4f20d5382c9a71c1c. 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/GBBFT0700018.