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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3be4d983cdef8092767ba12830091392aa31a37978956018a3f09194c5afd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5ad4010-fb09-4d3d-a1e2-cd5db2c152d8.json and https://artists.proofprofile.net/proofs/artist/f5ad4010-fb09-4d3d-a1e2-cd5db2c152d8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359c329fa5a1478d18474bfb71d2ae4416536ae24ff4a05566a1a10ba3d10e3. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/FRXY29800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6816303b27969cc3ff3569d51f098bed2c36ba572b880d95806c4f18edf85. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FRXY29800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c0e05c1aacdeebcde43ba8f6790b40028ecd1ebf50c5831b6d058ad8751d7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRXY29800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523ab386c07c3307c66d18fbd041e1f83c5dbcada18c0fa696885b5f92075516. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRXY29800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00446945aca1a2a825640905119f38d41d11cfd183307309d9ed3f224c493f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRXY29800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359c329fa5a1478d18474bfb71d2ae4416536ae24ff4a05566a1a10ba3d10e3. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRXY29800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6816303b27969cc3ff3569d51f098bed2c36ba572b880d95806c4f18edf85. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:34Z), 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/FRXY29800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00446945aca1a2a825640905119f38d41d11cfd183307309d9ed3f224c493f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRXY29800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71c0e2e643dad01470a63f342592717a683143558020a822058df90005fe19c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRXY29800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ede17166fef005ad2b661454e1d33ebcb0286f50b6dde202d959c6bab71fea4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:38:27Z), 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/FRXY20100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ede17166fef005ad2b661454e1d33ebcb0286f50b6dde202d959c6bab71fea4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:27:27Z), 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/FRXY20100059.
From Buenos Aires To París (Best of 1958 - 2003)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bcf3edff4a4b65a4157e44ad157728a3d67ed7537a36e8d12b3b509c376447. 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/QMFME1324924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe64d3ab34185b1369c0a9c0d20d05934b1afdb7a58fc99a0cca6d94abf583. 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/US6R21343966.
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