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 0x8df21a3b99390fb2411daa71768602324e4ea3e8f940c12fedee5713efa4025b. 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/e9ec68dd-02ae-4e43-a0d5-acef27f3c426.json and https://artists.proofprofile.net/proofs/artist/e9ec68dd-02ae-4e43-a0d5-acef27f3c426.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Track 1 / El Show De La Monada Musical #1
Paquito Ocaño / El Show De La Monada Musical #2
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 0xfdec620e0bd3a18899dc8751460e6cc00c5cb7c0d70ae2aac52eaf4d0fe796cb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AR18A2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a832fba9d694ec189ecfe38bbd0aa0c1d3afad9860c6f4244eeaf12eb6182. 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/AR18A2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a7a04c147c6fad916f2c6a08207b245d03878be9a0ab81f4b0dbf03f1ec75. 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/AR18A2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72720c9fb75727a2215b31ee11aed32068fea3400bde19f338a60b7c1ec16fbf. 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/AR18A2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07274651105da06f1f5678c8b03c6e6a33166481c64974fccd47e3bf60531df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AR18A2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73cc349385d291dd6b3f6823b3c68a308536264f843b46fbe49588ee067c50. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:55:43Z), 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/AR18A2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86936d3f99cbf0a7d001acbb3cbdb2c0b4dd5e1fbc267b947b08b13d326a411d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:20Z), 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/AR18A2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5884eec7d9de6d6254ef9d9b3f94642cc9a7e5fb9d48d406bc2261d27631c5ef. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/AR18A2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a832fba9d694ec189ecfe38bbd0aa0c1d3afad9860c6f4244eeaf12eb6182. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AR18A2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a7a04c147c6fad916f2c6a08207b245d03878be9a0ab81f4b0dbf03f1ec75. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/AR18A2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72720c9fb75727a2215b31ee11aed32068fea3400bde19f338a60b7c1ec16fbf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AR18A2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07274651105da06f1f5678c8b03c6e6a33166481c64974fccd47e3bf60531df. 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/AR18A2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73cc349385d291dd6b3f6823b3c68a308536264f843b46fbe49588ee067c50. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AR18A2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86936d3f99cbf0a7d001acbb3cbdb2c0b4dd5e1fbc267b947b08b13d326a411d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AR18A2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5884eec7d9de6d6254ef9d9b3f94642cc9a7e5fb9d48d406bc2261d27631c5ef. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:47Z), 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/AR18A2400049.