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 0x6cb7ffc339c8227fd112289501aef819270f82e45f9193eb49e7096e8c1e8642. 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/93a07e3d-3bf9-47c9-8cb4-24199c5ab806.json and https://artists.proofprofile.net/proofs/artist/93a07e3d-3bf9-47c9-8cb4-24199c5ab806.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 0x68be736c9a8526431b707028da0c55220d6e3d827186a6ee8f5065ffb0f46019. 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/ES71G2145387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a39c5c300307584e2fb7d81071cab8c2cd8ab522a70f7a178ecc349307cfc8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNJW2262328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898b9b5c5dd93fe7f18c63066048dc9e05cdd2ba42afaa1cb5fa7e298ebefc5. 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/QZES92011343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3574112fbbd686d3a1a9adc25acd2bf436583abef079f92e07e3d46c142065ce. 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/QZES81915926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51274a905e79f60223f86fec9f721c045a4bddc994bab8fcc6b4af09d219232. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBMA21862848.
Frutero Vende Maní (feat. Marcial Istúriz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dedc50a3271ce41aaa128469212650b924ae61dcee74bfdf9fefc630f8babc. 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/TCABG1263425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f566656c6757da426049d0f228114aa5fa070362a77ec3b249eca075d2bbe8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBMA21862852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dccd620b92bfc16cc447929d3b1a013534429e001579ff918e7ebd236b8a907. 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/USDY42181951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0539377e8a82cf5e973545f916a991a4926201945a8e2e2aaf7e47cc6b0dd466. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USL4Q2001097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898b9b5c5dd93fe7f18c63066048dc9e05cdd2ba42afaa1cb5fa7e298ebefc5. 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/QZES92011343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f625ab392d688a4efdafd72b4ce8d8a28792b2bf5a88e6bcb7696b5c0b1d4e. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USCGJ1402280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520999a210502d2206e420aecb87d0ed07e3cf9edb0e18be5ec0f2e8f6bdf398. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLG270800704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed3dcc753c6178966a2f5c08a99c431f73ba5ff5a7e7014d5d083b0d9f8ea4. 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/COA6W2102040.