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 0x17958bced57597bbcea6afa094b0c1936f0a3cc591f64dc541caa6a702e245de. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20391f50-dfa3-40d7-bc6e-d93be65e0fdd.json and https://artists.proofprofile.net/proofs/artist/20391f50-dfa3-40d7-bc6e-d93be65e0fdd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peer Gynt Suite No. 1, Op. 46: I. Morning Mood
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 0xda11d3565df1f575ec4f89d3b2ebb0c7adedbe3de6f5e64ebbad2931bc56d7b5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBPS81500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f6e983fd7296ec3228a4988d600bb5df11ced91ffc57a541f4ea77401502d. 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/GBPS81500442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d9070e06eb40da976b4be06370f44d357f523085fd62f936acbb2a6344809c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GBPS81516879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a545b534658c32ae00b6e12b9089950fc57d9459ee756c266a7216f6d8079bd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBPS81400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf627264de0f8e5fb394885b67dcdfbf3f8b9145e3bb53acaaf109f164b67a596. 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/US6R21419985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ec4deb1d97065d75f316a0f292d13483a2787df84fe57b5b7f167589ac4f0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:17Z), 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/GBPS81400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8fabd17cbe3bf8e6e843d9df426198cd38e0fb92af6aea133d3b27f67d5811. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBPS81518881.
Peer Gynt Suite No. 1, Op. 46: III. Anitra's Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7bc23c0c32876544c4b9de4ca171fcd6c0d1f0262cae863c04a067925550af. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe17080428e09f804dee53add80ae3d9fee943c0ff883df589e6c8290612f12. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d505b5c4dde5233aa5dc171fcd712b670af1aaa37adad843f56d95894e9e48a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81400032.
Sixteen Waltzes, Op. 39 No. 15 in A-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf61d99f4f13a96b3fdac35c89f06c5c412c5eef28c2d5721d948163d4775b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87649adbb7132eaadf2415ff959fcfaa9fe55feda01190c60348d7e57ecf7148. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USV291427155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994cf080d291fc1f9c269382682a2d0e8f4b93394261f8829a95bace4fc4be76. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBPS81513658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a72ce2c4a873c982e0f2b257bdc9066e44c254b587466787263bd39b2fdbc9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81400007.