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 0x1739ac421f1e016c57d452988223899ed3b0c525dc66e7fdd5eaeed663650837. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b77f571-b593-42bf-af75-a12fa5b1330a.json and https://artists.proofprofile.net/proofs/artist/1b77f571-b593-42bf-af75-a12fa5b1330a.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 0x1082a171aa8232a5bc9bc04e00cfccaba3f57a3441e8a4fbb89387cc18e4b7b5. 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/USA6N1410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba9a19de6517fa96ccf551ac2cd3a96897fc6e920dbc4186732279939ef081. 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/USA6N1410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0560c0e98baeb22fb5cf836106f8f283605451afb0eda1cae317dde073d4086e. 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/USA6N1410003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c342b0bdbbb2682a6a35cb478a44aa31cae3861514b1dd687b55ed785347ac8. 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/USA6N1410004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c135d98b47e89f7d2c877fcfc7ef9a83e4becc54d7d0b3ca5836ca5884251. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA6N1410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a7b6fb8ccbc14e8b71f3a34230d9d2ef565e843c714d27916b52902a6dea32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA6N1410006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212e3606a81cd0c635fc6765aa59ad9c19498d23ffa94d7e5a0ab99629b198f. 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/USA6N1410007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a04365084f39f2c1849df6c47924b14f8faaa11154988c914a264e6d175705. 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/USA6N1410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c63540d718ff6c188c8a7d6d8bc0bd09e3a25ed91bff3900784c290ede18a1. 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/USA6N1410009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cebb68adcbc9922693f815380b01513bf2d9c3bc34b07968acdc4a4b0b235cd. 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/USA6N1410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12828c3425e2ecfd17d5af2559f3b7c2905dbfd2ea7b7fdbc7694f63abe68495. 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/USA6N1410011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8c98cd80e554163500a30b1f075510b49940dddde5b24a68d3ec9d15263d5. 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/USA6N1410012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290219addf33f6685faa7c6d982dddaac71c70facef0c3009ca6ae44430cd46. 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/USA6N1410013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4f4fa0e5b0410ef3dc5ce065a543916543c87d92c2366479d70e622faf3773. 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/USA6N1410014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f581eec4be005327ba58a83449a54eb17f0c9c92d661fa46e3ff0679ddca3cf. 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/USA6N1410015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03743edac615090232da63f6997939d68d61ed30d212d71eda866e7d8cb47b9c. 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/USA6N1410016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e73e7524ead0dab31eb43fa6b69c861a2e7a023e475dc7c42f031c40b9778b. 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/USA6N1410017.