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 0x0111a9ce2bb6c81c357466b6fe7d536258651a5a3e8440e0983049c244ac2cf3. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe2c685c-a931-4526-8ab0-e86333400f11.json and https://artists.proofprofile.net/proofs/artist/fe2c685c-a931-4526-8ab0-e86333400f11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Royal Symphonic Band of the Belgian Guides
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 0x19828d748c9b220aedeb3c0f2ab9c63df25a05d598914248a4003a63c0f77489. 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/NLC351519901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b97d414577138c32a4768df3f825badac3371f3b70fc799e8865c4613042e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC351519902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b5aa36faa734e8f88ec3f4dbaadefd62c7d63fa4171bd7886290be6413ac2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLC351519903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2da9b3ebfc10d8bdc2f3b6d0d7687cf893682fdf1ace631380e337844325e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLC351519904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2e377666cbcf2f36538eee8b8876c6057297f0c4053e23635dae13de3c3b3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLC351519906.
El Olimpo de los Dioses: IX. Ares and Athena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c09648337b880bf1203d02995846ff32bc6af759794c8877b03100735594a9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC351519909.
El Olimpo de los Dioses: X. Zeus and Hera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2fe2e72e94754e0846ef92f7f3ece2d450995a614ea938e75e71524f885142. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:09Z), 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/NLC351519910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47adb85f9f94d5eff4e92b89ca1fd43c6789b13f54f72574a2064870ef288bf8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLC351519912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc9057e6641821a38c01b67c1e7d59467e349ff9a08782e9b7ed7a823234f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC351519913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e2548e982c5b0655f7595073f51296485813eb1aa4a20c352023bf29000ba. 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/NLC351519905.
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 0x6fddb7773352c5e8f4f917a29cbecff8c786e7fc69d80a0f65507cdead47ffba. 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/NLC351519907.
El Olimpo de los Dioses: VIII. Aphrodite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cfd40d3cc33c6cec451e5f5753b7fde3e06942afb27484a866f5adf16d9b4f. 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/NLC351519908.
Second Concerto for Clarinet and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea54c45d909c7a847b06a8aee6afd64cdf7af562c17423a4f1b6156067804a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLC351519911.