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 0xe6970f67f82632816362abf2de19e2d3248c8286188055c8d00fe7f59756ee37. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbd1c23a-bc4c-44eb-87ad-e8ad11e19ca9.json and https://artists.proofprofile.net/proofs/artist/dbd1c23a-bc4c-44eb-87ad-e8ad11e19ca9.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 0x5314ec73f9a85eb2827759429efc4e0b6a4e1f7152cda2aee3ecffb4d880aef4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:51:41Z), 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/USL4R2148709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2f15ee03afe964052b3a282fbc7f8d8ceddabb7e31a33e8720540831708a3. 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/US3DF2415035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0987e558f382801e0f52beb71aa9a55db8b0ee98cb6ac7db1e05550f05a260. 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/QM3DF2149557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e9795186e63e27339faaa92e3398d6fc0927d6a2106244bd771e305be4bb87. 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/QM3DF2149562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2b6efa404eaceb4bbb6ed59ac07c1b2c29727a523e2b6414584005c28adfc. 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/US3DF1985969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70582b9d0fd9ed7f9ac118eae0a44727b6bcfae6c503c9f364c9f18013c7bd35. 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/US3DF1937175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de4b57ccc1a7b9f79637841d6ce840d814895453922900f9c4977c0851302b1. 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/US3DF1937182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76649d20a56afdf52030349f06910de9ee354828bb05b522dd33da11d007975. 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/US3DF1937193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20770491c1a00fd796535283220389706bb0fa2bf76d3513a7b5782afae020. 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/US3DF2477691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2f15ee03afe964052b3a282fbc7f8d8ceddabb7e31a33e8720540831708a3. 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/US3DF2415035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de85cf02b08462bf7cb3f954408e2e3c3d1c9122f1a67fdac526fc08b912a95. 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/US3DF2415031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb53480c3aaec2665c746be0381a923921391f744300d9cc4b4599265644952e. 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/USY282312952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1084ea296d7b850707a36ec4ef08fe3198ce2ff2b82c7535c2fd3460b10e781. 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/USMH92372225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b85ea3dd372a4b2d4744d02e6909fe30e765941e86729ba1409c97daac0047. 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/QZDQH2373657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce82c7e0b5bc3910c59643f0698b9a625ecc1851e5e26a7cdba7d1c7325384cb. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZDQH2368033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abbcba74b5c1836e03c3c535e0f412831b49077e38ef6a29ae47c74a0f57401. 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/US3DF2152995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7645e55adac36e7bba884bfe846cfee3a8bc01aeacbe48ffea5bbeb3cc2ad. 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/USANG1925839.