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 0x14a07358c113d95a0d80ea4afb031ec893445a09c423b53a1f7158359b1c6442. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08fd06e5-af98-4053-88bf-a23b9ca23a6f.json and https://artists.proofprofile.net/proofs/artist/08fd06e5-af98-4053-88bf-a23b9ca23a6f.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 0x66079052edb900a6a8f367b75c0ac466cbbcc9aadca75c23aa7ea42bc654f89e. 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/NLZ7B2300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83de724644dd0be7c05420bc2775ab53278009f90aab109fe701e609e4951d1e. 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/NLZ7B2300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee5697b2927027bc7296773865e6bffcff1f40403a8862eec6e8875ea229e44. 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/NLZ7B2200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f4a186e68668fe437c2aee8e0944e982442eca953b9226ec95b834c91e53f7. 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/NLZ7B2200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf808829b04195aff6a3c64cb88680d8528375a6f7c28e6b31aa1f6e349835c00. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLZ7B2200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf808829b04195aff6a3c64cb88680d8528375a6f7c28e6b31aa1f6e349835c00. 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/NLZ7B2200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16b2c567f7703c314072c37d426adbf1df22cdab1344bf0824817b571c1732c. 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/NLZ7B2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1c25017711fc25e5adfefdd7f842a3716846e73c22b1ec231b1367d514ca5. 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/NLZ7B2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459d73084f17b343bad70bae9bff46523a4a9006187b2fc22a8398f12b4919d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLZ7B2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f51d1d75b92653e278d74d9c310214091f76a27187aaae86c1b9ed70365e62. 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/NLZ7B2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b3eded10ed8d223da1df8143d76f3fa96e7850d4791c0a31f09745c481fd5c. 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/NLZ7B2300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8cf2f971989a4f3cb8bc21fc4a7d6b83338bf326c498438ed0f3716e4ddbeb. 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/NLZ7B2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad3be67d32f6768cd591768dda00057399175ca567ea029234450ad3a510ad. 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/NLZ7B2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2f27d2adeacde6c44e6564f45540bddda1f0ae6651bc4d229618f73b669191. 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/NLZ7B2300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eb988ed53677692c2f4473c1b3c50eb1779fbbf44e25b342006c9b468fd552. 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/NLZ7B2300322.