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 0x6f2d1df66a89b14de8cca9b4e8e5264a1c732e79b548c51d4fcce8a4b59ed300. 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/2f568b34-f039-4897-bc92-3a633c58de13.json and https://artists.proofprofile.net/proofs/artist/2f568b34-f039-4897-bc92-3a633c58de13.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 0x4d3fe6b2d5906cdfbb32ac689bbd987e691620c3889ac0e625c4d51295bd1665. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:58Z), 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/QZK6Q2277019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17490f58a69d81a3671d1aa06687cf62473c2e4914a44623c33acc6930e0b27. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMHL2389093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67418861887fa572275469351b7e1265fc55977ee160d345a297b8f7fb751173. 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/QZMHM2459890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0490390fa7a217ec64dcc55884df4bc31e27eb13c00607368ae6568f7bc6a52. 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/QZMHL2474204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0852f505c687a10a62bae97d757b4c5e3c8db1b6e20549defe95502f4c6f9517. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2421777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de57be7d3366d9e6644d2a4adb9701e87a838a673d0b96b13bbf5865547d251. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:34Z), 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/QZMHP2483306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b091f29c56b5e8e7f1d9b8fdb94e3c4c5687c5902c66305183dbdfd605c36. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZWV32435165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e348906353b94f826f03227271da83f58ff35a93bec262b2e01f423545c2b9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHK2455820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca53634a21552c298582c8c3cd26372412a203e127259d4ae925b8894fce39b8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:02Z), 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/QZS642592457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1b88345464d0905e7cd29daed0dc37dbbd6755e91a9878d426fdf57ca450a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHL2559880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aacc031b2b0c614d5a8d059532bcf76518e1bedb2209ab3de862836221de498. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZZEB2420709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec555189dea27ebf29cc36db9b2200856e2ea7433657597cfe3b04c397dcc2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZEB2420711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eb83a9df482d4af39ac4f3ea9e32660b621ce251641b7b4df5a7e7f1438917. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZEB2420712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b1c707c089e1c41ba0073dc6457a3d284b39eb032d6d83eeb841d7129789dc. 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/QZZEB2420714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bcd3245da226cb4ca5ec5c2a37f8ed2af14cb8e0632423d945bc3d98ed38b8. 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/QZZEB2420715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80774f3e2f26eb781a86a72bacca358ba3672f7855f7ba33e16f83cd5ca3f754. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZZEB2420716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791662561a8633abdf90707fb435d279238390bd1fea017dcb7f71ca3e8676fb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDD2566499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb374953106dc1f27093cff1bae421ffb14c731859ca17afe89b70ca3f567efd7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:00Z), 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/QZZ8A2537702.