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 0x942facf9ed228e67b1816167aaf23203714b2c7f4a73cd06fc7614b2eed61a2b. 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/4804f33a-a444-4721-be39-ba8ba0e2266c.json and https://artists.proofprofile.net/proofs/artist/4804f33a-a444-4721-be39-ba8ba0e2266c.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 0x5a314b92c3baa1e4622dd1118c206ad31aa94fb67aa8b8aadac920de9eba49cb. 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/QM6MZ2225343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3829ce72e1cbaeb43b675ab2f43e8b182109afa9ceef6ac8b242b3ae3c46a. 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/QM6N21961016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb003b7903a464c9353a97fefdc3a8a84a9673c62fb0d57044f858c2e71a12f1d. 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/DECP92004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c6e434994fd968fc0a2690ecb0badc178d33ebc6198edacae3997686046f6. 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/DECP92004002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04424f06a61f445efea90c4a47002b0941bae75ace93d9ccc0c6aee09b095aa. 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/DECP92004003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfdea94424dc6805b7a69e91907633aa9a490e9bb618348a96b60ca1028d2f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DECP92004004.
Sinfonia d'Apollo - O quam tu pulchra es
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde624407751ca40687b5ddf8362c28a89891799924de93ce041e2c08b64b6ae7. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DECP92004005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56b3e2eb7af34e1bfdfa775889957b36024a1f08ffde4ed784ac9fa3b101ed4. 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/DECP92004006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaa569dcbe26c37985f9a4f129dfce9af59dce3e026802d52f76b81fba7d7c5. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DECP92004007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8656c4cc41d49d7992915f5660e6e3667960f3fab3f45afe154ba811c6eec85. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DECP92004008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c4e2ba54ecd205999d310b256ab5f03b45470a5f1b5d17beb39bd9774f6b5b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DECP92004009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803260fc3c5a9e33b6b8cb39eae7aa3f57efe783f9f1237c1c2daceb6c1f04b2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DECP92004010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e384e6a6d43eedba811cd054900ea2201f72b4f57ee5fb854169798a2dc8c8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DECP92004012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f4f592410af15dc03ee9b8540fcec98641b6dca70e9dba215eacd0374e1410. 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/DECP92004014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9093c5d4f1c47830ff82bd741c24e137869f36f65aabc4a28035bc2dcd1d21ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DECP92004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d64d75de3ca5328986bdffc0b8ae268690b87734fbc5b8c67d018fe60b5498. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DECP92004016.
Homo fugit velut umbra - Passacalli della vit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff473fc9f58c46d76e03113ab356c998e94235f6fe24e536a2dfd5b588cdc2a. 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/DECP92004017.
Passacaglia (After L. Rossi) - Gli amori di Apollo e di Dafne: Lamento d'Apollo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c6e434994fd968fc0a2690ecb0badc178d33ebc6198edacae3997686046f6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DECP92004002.
Libro IV d'intavolatura di chitarrone: Capona (Arr. X. Díaz-Latorre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfdea94424dc6805b7a69e91907633aa9a490e9bb618348a96b60ca1028d2f3. 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/DECP92004004.
Ya salió de la mar (Arr. N. Devecioğlu & F. Heumann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8656c4cc41d49d7992915f5660e6e3667960f3fab3f45afe154ba811c6eec85. 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/DECP92004008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803260fc3c5a9e33b6b8cb39eae7aa3f57efe783f9f1237c1c2daceb6c1f04b2. 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/DECP92004010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f4f592410af15dc03ee9b8540fcec98641b6dca70e9dba215eacd0374e1410. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DECP92004014.