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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530135abeb5fd783d19653f6a1f628e7090c413177127d1d97700cb9a2fe10de. 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/0130199c-3ab0-46cc-8528-bceb1e6a6e87.json and https://artists.proofprofile.net/proofs/artist/0130199c-3ab0-46cc-8528-bceb1e6a6e87.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f4367d8c6eab03fcd8e7695e3b08d63254dd49547fc55a07a06aac0756440. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6P2202567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b83c8f9a81cbb5f24f3dad5d731c3d8d0d0bfcb71e022ef437964edc02852e. 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/QZK6P2202569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dba7b8c87a86066ab925972aff52c4f2b9e0253c88464d50aff76f7113aec6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6P2202571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe47226a133316bef8fccc0c8c1b10c31faef1356064bd9739b6a40bf6ee72. 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/QZK6P2202574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658f9956af1e626fcdc19415a8f3d855cfff9bc5aed440ba2dfd33de063e32b. 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/QZK6P2202575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b444991bc0250b4da3f64144aa756752b87fedce56012427599f1110b21e6. 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/QZK6P2202577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75eb02faf447529d63939b02deb740ef6b12da3804f3a13eb7fb97e27854635. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZK6P2202578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a60b22b82516866b4e7751cbf15eb09fb940f621d0d2cf49d3bd7ed554c8aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP42204499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22353cef627b686988b97cbe5dad783ae4f80cf430ee1617a854a661b1c2ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2347511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd204758fb6fab3282cf4f94f261b63afb72999949cbd231bc0f4d5187be5ae6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZWFK2356084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4a7881527e828eb780bfef4437979729a08b87ca38d00dadd60d67e7f5399b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA62430752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13e30a1afaa183a3bbc90bb7f04a958596632f9091e424aa3d3d0af3651eda2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZES82438003.
no podemos ser amigos (we can't be friends)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204f8b31a072e1542eed2d12278e0ee3564a7ee92377fd5d402f8e267e12dd93. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZPLS2424937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4a7881527e828eb780bfef4437979729a08b87ca38d00dadd60d67e7f5399b. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZDA62430752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51095fe54e1d98d4e5eefc5030e53776aee7b86cdf0594e2ae4d7362b7797e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFL2307042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd87d54d28db750398753a3918b44b30d3efcfcfa674557ca566d24679a622. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZHNC2587059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57601767bfa77d019015879c653ca827f97d3291baae023878f9214e48db00d4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZK6P2589434.