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 0x3c4e10972382e0123629e54fbc47d5ea81dce51c0827fb93872707d08880d4ab. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6d42d66-e541-4f28-8ecb-53c890cc80e8.json and https://artists.proofprofile.net/proofs/artist/f6d42d66-e541-4f28-8ecb-53c890cc80e8.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 0x2543fa5f236a20699caa38a82ec788279a9192f31ccbda3e46360e8e5a26c524. 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/GBKQU2372200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501737ca0516c1f12929042a0dc3f3ed53320a3da7b8903432c71668bd316aed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2403404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782b6c8423ebbe1ef466688221269be01ea3b5b33048cc07f73e15f34175cd1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2404486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03218c13d026f4cdaca480f28b325bb5062758f363a9203d37652336cfe70933. 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/QM24S2404621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d03e0877d13b1768af1912a53fab0565b1ff7d35d46356601f77581fc54e402. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2404620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811e030cf7735d07bd215bc2eaea603bb04d9ff09fc08af95cd6987bf3a2da9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM24S2404619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b76ebf5b105e64864f9976319f46fb7ae3338b0c940be3714b35887d79ef63. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM24S2404618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2776ebe2e00c2aeddfb1951e0412453176f90bfaf7456ca3ab9183cc3e1fb8af. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2404260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd1db97ba59a04e15a4b78b1728dd0e3ecf1100c3c74c4fff25749e475d679. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2459492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80fbef7b381dd1b9f40328f7031489f30fc141885840b6f403ace1037c0129e. 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/QZPEW2459498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7902950299410072f77b124e334221fd1a0fb9ef9d4a01a6f43bcf7fd57ac6b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPEW2459499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c585830e6cb25a2b5fff3c77fa7a5587684f1203722fcbd1b6bebffa33a0ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPEW2459500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee515f36365fef7bc69e0f6ee54e7d6e3b6bf622ee0d5476a0f6ab8aa7e0dd7. 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/QZPEW2440073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b1b09edb27b92eaa1b3ed6c10533e3eb0ed8669c97f535f1fa40af07b24e22. 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/QZPEW2459503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734d995be787c4b621482dbffea93b5e55b9a64cb7742ad55de4fa83b6f6e116. 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/QZPEW2459504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884b98b3a2f38a3a580ba6c4291a0da5829281ef7135545920441b98073d532. 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/QZPEW2459505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c02d5edf2c20f3997056ee6720ce4d9a33681b4dbd7f7da43e19da9351c815. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZPEW2459496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcd751c783f4bdd45b6458f3fbef4f3b103647e0120af79609801bdf64c7c35. 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/QZMHL2313597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88656689da2a05ac52f532a9353ab5905602a692843c283d6accee1b01a61d35. 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/QZMHP2386289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67fe8770b2754b8ff526f526a7b993ffa1f0f4b170ffd6e9399535ce96383ac. 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/QZMHP2338791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963780e6de4044005ef64ec271e3ae8374dd44e7eddee835c9bfc5a18304217. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHP2323897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed1f479ce38eadf0ce575a487903a3f0769509f50104e9ae767d2a5d6d046b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS632326379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711912dd251c202d127a14c8f17b439ad0b2dd317a19bbaae4335e50f0c36244. 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/QZMHM2310469.