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 0xc8d7ccc9b6dda3ed623bbee8bf09a5b72ca842a0a80af952025ac3fe7aa59d11. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb2cb0ff-02b4-4938-93c3-6c89ec637cd0.json and https://artists.proofprofile.net/proofs/artist/cb2cb0ff-02b4-4938-93c3-6c89ec637cd0.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 0xf177df00a00adb98168b4ae906ff043e79c472a59278f411d871af3399004c60. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:50:36Z), 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/UYM121602286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fb2fc3096390bdec66e696e9d54e18df7987fb0de82289a890facb0beacf90. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UYM121701817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c5b5e3f15f33cb153c0f5f57c9bd04487613f306700ca4b538cab9df0ca72. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UYM121903856.
Quimbara / Más Perra Qué Bonita / Bemba Colorá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63ec6602b353ac2ba6450d20203aa0510f0e36f79150da6a27d1bc56553840c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UYM123001730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61964177e7adab4b8535c0fce1f1c59a01fb40888369ad7a3d6cda9e0dd693e3. 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/UYM122401419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94ed03477686c5083a8f338619ba52ece24ac66bed9d7254830248ef78de4f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UYM122401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c10f3271b2d1fa247ca1c1555bed16bc917e5e40206964155eb5abe9d1984. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UYM122500738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc51d32c4bde5f6075f5dc735763869513b229fc8e6fd829176f4b836ead4e7. 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/UYM122500741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323218a74edcf782d3f0150267d90f13d646cf961d5b70ab44c9ab066df7fa52. 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/UYM121701523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21df948e42d485b8f6a389ae44f50e1c15fdf587911cdb3b3db228e27a7fce. 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/UYB142510900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa800c398fcf8d0b3a2f4be04b3dfdf4c96cef8b42caf39ede9a625ae6b5f6885. 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/UYM121401358.