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 0x5d4ceb20d2335dabd018295319fe571ea38abf6290d93efb21d2cb2375c6aba4. 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/c86daef3-c27e-469e-8f4b-0581e6dc3ca1.json and https://artists.proofprofile.net/proofs/artist/c86daef3-c27e-469e-8f4b-0581e6dc3ca1.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 0xd3d97423641eec35e61aba39ef9672a90433f24387f2e9a4fcd5b6241d13ec40. 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/QMFME2376862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228fc8bf949a95365bcd5b440d86fbcba3d712ab9f48a91b8dac882da2b0dd1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZ5FN2446611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789700b47b1a2858ba5814c972be6b4caf500a5f143e580f770adbc24b333575. 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/GBRKQ2499874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5cd2fdf1794cff4e88e2d29476e51146015fec1fa4bf110f5a9803c184342c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBWUL2483019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5cd2fdf1794cff4e88e2d29476e51146015fec1fa4bf110f5a9803c184342c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBWUL2483019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789700b47b1a2858ba5814c972be6b4caf500a5f143e580f770adbc24b333575. 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/GBRKQ2499874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228fc8bf949a95365bcd5b440d86fbcba3d712ab9f48a91b8dac882da2b0dd1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZ5FN2446611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d97423641eec35e61aba39ef9672a90433f24387f2e9a4fcd5b6241d13ec40. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMFME2376862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520cee857c8d75ed40355cb63c6f04d350f033e79487cf96bbc454f06deede72. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWDD2480133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47915a4d1b1c30c2ee2ae98e3cce37c4a0d891c244c5804b940c2a1fa4c3f880. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZWDD2489387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47915a4d1b1c30c2ee2ae98e3cce37c4a0d891c244c5804b940c2a1fa4c3f880. 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/QZWDD2489387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ee779019f47edb09cc802d90d9a9f4b5d8b2926e02c54bd7fc16d15b74e88. 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/QZZ8B2438449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a7168686f0b035871bd706b0eef1e7898f185de9ea374bfc1bb599859250e. 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/QZZ8B2439085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e36560c82d779aab729e51bf84719cb26b111e773010a3205caae571c6703. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZEC2458897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789700b47b1a2858ba5814c972be6b4caf500a5f143e580f770adbc24b333575. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBRKQ2499874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d9a6e3bca8a0ddb50de3a21e3a379bbeab2c485766a0b25902069c8149d0f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZEC2458900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b88088a1ca0a51de4e10e544e95e8bd9b1303a9cc11f3745737221fc6a48c4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTV32416231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228fc8bf949a95365bcd5b440d86fbcba3d712ab9f48a91b8dac882da2b0dd1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ5FN2446611.
I wanna marry you (if it's good with you)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e92031d5008ba2f8610d2bbf390ddca981d5afb147aac0e4c1ed977af2630c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWV32544437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157610c3567aa7ec192f7a7c1fdfb372fda9e17cc52fe21c4d30e3ae5b31834. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32544450.