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 0x38c6ca7acb362d2b56683097f7904669c9b6c230a4a18005d76d286cd3dd5443. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a68c45e7-bb39-4f30-ad3b-ee55e9ad30af.json and https://artists.proofprofile.net/proofs/artist/a68c45e7-bb39-4f30-ad3b-ee55e9ad30af.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 0x58e14a19031c09f7cb78cbcdb31ca393447a072cbae691d1e064c058fb998a54. 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/USA561254841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20d4deb2ff5195447b4baa87a463fb48aed5a83370a320e3f5cc518bb7e9cd5. 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/USA561254842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdc6e8e89815cb720484c5d7deab598712cd73dc04cd0060f6a7b51dc520c68. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:20Z), 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/QMFMG1428823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1400834ef6ce999a3d268f1c587dd0608d830a5aa4f1ec5f769062e629eed. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:13Z), 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/QMFMG1428832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313168df351fd8ddb86d6163a2b3f17341b2f470be6451c6d498c9a9a9621df0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:02Z), 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/QM4TW1543722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6302f99f62d6a992d0d0e595c80faf650fb7fb09d08f653036ed49dd86a7f77. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USY1R1965705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a8828a22ae06c19ece3a75558776c4057032ad3910258915a3d4b2668b1d6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USY1R1965706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b86689db306f389ee2441cd6b6ad14ed8b10c6eb4529f2827133fd3f3edd5fd. 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/USY1R1965707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b08e0b86071b8f04f59ce046932b037d58cc70b89cec46ac7ce2630b178c19. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:31Z), 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/USY1R1965708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ebd19c83b43cfd01bde9ef85f161d14498e0ca10b2bd9aedccc2eaa84ad65b. 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/USY1R1965710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e2ae49927ec9064a70a0c57cf5d536cb1661cce2b444d607835e642635871a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USY1R1965713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08ed7256c489114ebd5d63187f9271ce238aa562e5000b8e27a5c5f20bb61c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:02Z), 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/USY1R2178501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b19ca8bbae72049bf1614265d42210faee976489d4e739ccf409d2424c16e9. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USY1R2178502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4fdd53103da4a58e0c42c1efbff80ef3bc230253e7fc07385d8306b8abf9f8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:36Z), 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/USY1R2178503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d88199d62d408c0ebc995028dc99912816d02d16ca4479b16c89ca9fba27b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY1R2178504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962823ab20334bfb5bb8b21620f11a0549505d68ca57a6fad750bba7053de0d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USY1R2178505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ac7ab42cae792d33f744047de91509f3e1f4d7f31665b4c3191e9590a72419. 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/USY1R2178508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ecd2788143e07cb4f2865b494bad96251b1e00a8136d0a1d824ab82e9d7fe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USY1R2178513.