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 0x97c4e587dc7570d5997108e94cfa0783b7aa4461c62f56c3715a89191ec3ba12. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93762363-579c-4c86-8b00-6dfd6eefeced.json and https://artists.proofprofile.net/proofs/artist/93762363-579c-4c86-8b00-6dfd6eefeced.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 0x04b67480719f01ed251c59e1333a6be502857962146f6568cad803317badcd0c. 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/NO2OX1001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d31d4a0277937177791c7d9586c50084cdf4a9d76c18555d8b444412c7e138. 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/NO2OX1001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0abf54bf854f0c45da44d4cf076a87104f07e75596e1dff30d2989dd7cccb59. 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/NO2VT1101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7d75f23060774c91618d756e0a67813a8af4abfcd134d4364755fc4a5a2615. 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/NO2VT1101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018cd53f4317fab6404ba276e1168aa6e63a3571989e72cd83a8772b10400bb5. 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/NO2VT1101017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f959670c292ec3fbdbb4219fa07f29fb99b4e305d74e5ab5576fa2d393b7fab. 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/NO2OX1102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f94c7c6b6464f7d74746528bd0714225638d5198c8752120b6c66382e75cb9. 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/NO2OX1102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd991e45ef64c5db07580268e7f1f07e77d6a70268acb83fc2703a5aa4e1a28b6. 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/NO2OX1102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623150d2058fe733f1d6640bd5feb57fc62dff4ab146b0f3e71ccc1c2707a48. 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/NO2OX1102060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddee73957fcb34f3d7c268f5058f3d7777a1f1bf693f3d487ad096321e61604. 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/NO2OX1102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf71c20a8ac0b25f4d5603698a4ee5e4ba1e99f316a14ea913f7ef4b9a9e31. 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/NO2OX1102080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8efacefc14ade6db3f8fb20ec4ce18a3822f05c0c71fa6509df0ae1a23ad3da. 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/NO2OX1102090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdbebd3ad7709fb822661e07cd9c01b006d1989e9b7c092b7906d0b87af6f78. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO2OX1102100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfab5bd8790f8a99582dde5e7e1c5a821bffb0064bbe93bd2e6dc2c22fe5125. 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/NO2OX1102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b1800a5607bfd6579f0f91cd6ca6647b95b6e24a37401c18b09067ee498a4. 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/NO2OX1102120.