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 0x0bcef7093dacfa043be91755c035baa16c3ba2ca986aab2d6af8369fa10d977d. 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/03a5c397-f6b3-4fba-b3d2-bbaa52693d04.json and https://artists.proofprofile.net/proofs/artist/03a5c397-f6b3-4fba-b3d2-bbaa52693d04.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 0xfe0caf4a7f06c4bd8d6bdfd9c0371f60686553c6ff41ca0ece12c4d8428dfbd1. 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/PLF242006882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d031d5ea20a0c3e41d1d4be8506c76bad1e1220defb1fbf79c464fd0d1d20. 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/PLF242006888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba75e7c3ae7633de9ae9af17054f4575ba3e60fc92d6cc2a60b10071125cc6. 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/PLF242006889.
Czterech (feat. Sawa, Królik Karlos, Kabe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe011294786802ff145bd41a8134445397315848a7ddcb7a6a45e404f1d2c2. 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/PLF242006890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16e8b5cddd90bc03e8d7178d62c20ab4c87ac79c12812835889edfe8e96cfb3. 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/PLF242006891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070404d64d2a7e99b90e0ce9b51ff951e4a599c0d2d437b3c95b7c27f04cd9ae. 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/PLF242006892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef96770c52dcaef5fe41e75721af408af7f71e4c9dc6f6c86739d361c581728. 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/PLF242006893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb49a31211c748ed83f9f693871488e7c05179897a4edca9f66ff61956a6fb. 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/PLF242006894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fa71ba65a362ce19875aa72a000bb089cdcf48525fa1ee1823c6e53b0eabbe. 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/PLF242006895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f7dad20ff152be40f87b47b8a98b86c4b01aca3be74139cb1308c61b146ff. 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/PLF242006896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940e761543c8dc3cecb774d77fd085b327cda76e2dfd6d2c31141e94e4eb90f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF242006876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86eb2ce2d1a917a2e56d16514647a8d4edfa977c0f4b55e2d9f439a7b711432. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:28Z), 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/PLF242006897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d3cec2f25b18c1d6691561a71ff6331045149ef95d76194e496c03c195a142. 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/PLT612250004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d7131f81c26e3b2da9e5a7699d90505b64d0d75fbf97b8c5edc1b8e67e718. 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/PLF242107636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e389626ddff7f26fb9d204c4df4706c54d2ee5ee5e568ff72e6af7ba85389f8. 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/PLH511200674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d3cec2f25b18c1d6691561a71ff6331045149ef95d76194e496c03c195a142. 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/PLT612250004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f7dad20ff152be40f87b47b8a98b86c4b01aca3be74139cb1308c61b146ff. 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/PLF242006896.