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 0x26d58b2a64f764672a1f13565f41b4a45d51db6098afa5286d9f63b3c68d8d45. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25282412-3eba-4ca3-ac12-88d34a38365f.json and https://artists.proofprofile.net/proofs/artist/25282412-3eba-4ca3-ac12-88d34a38365f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d9d87a4c9d9c97af785106e4abe504ccdee4349baff4d672fad719fb74ae4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNWS2455787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdfd2d0ec16853aa1ff6c2f1b98b0de9984d9ece54548e3c958286f9ebd4686. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTB42414139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368386536f1a090f11b101780b21807669d2e8e0130c8962389abeeab8934c75. 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/QZZ7V2415599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4d9291be86aa86258557c3db9c15d31ae4f75a0a17d847e563e3871a4ffe7c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:45Z), 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/QT3F32404762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89f07b98d04e09264b12b2cca1dfb5091395e454cf82cf997749c5d644442a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA82528089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818bada737158cd982d3dc6d23462480e7635ba0a57145acd4a151cd0e9992a8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82527176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce0c62c7151563651256984b3b48ed4d7ec1c840909fc38beda1da87263c4d5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWX2543604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1098d65a8376b9966d057121da99ded912237f0c4b3b2d4c468011b4d4af87. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWZ2523300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603deb5973312be1a4334f8ad5d1dab982043036ab3d7b1fd24d4bb9de4c340b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:39Z), 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/QZTAX2540727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb15c19e172670f668e0b53452edee9a845ee47997ec7fc63d80491daf1f405. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:23Z), 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/QZTBA2527838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a4a8bd56546127a2cd1791c50ea5e85838ac56ffb9d9ec79fc8c668233187f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFF2563032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed738fa218e1360773d8446db512338844f391f9a9846dcb90f1a79b7c113b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFM2531582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085dd9bc2cb31f1003cf60149d9a28e2b22444a0ac62bac7d807bf5ea9bcf6ad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFV2585923.