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 0x3880d4653bdde03b7e0386c0d741df62c80526216192011e32eb575f8b7fd923. 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/b4cc3139-9121-41bf-aa16-6a3fd4372eab.json and https://artists.proofprofile.net/proofs/artist/b4cc3139-9121-41bf-aa16-6a3fd4372eab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sobre Una Tumba Una Rumba - Original Recording 1956
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 0xce4e587b764a6d05aaef164bfa6c9eb029f7eace1e688479dc3a3315ca554a3b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDBB0681187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2af5160c97c57722e314ed2711c9dfae4001b07e54517718e612f971d43956. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA011303438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18ed8a613dcac5109a60cd108ec13bad042f05790b569902f44083b65cb3d5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BGA671634301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e60a5b8aeb70b2110a1187b77e91bd3105f882a49d39ff9ef806ff45880966. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BGA671634303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401cd41b305e49350e5fabb23ac61d10c10e8db3372ed649fb0582a89c8b56ed. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BGA671634304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68008a4ebebcd2c436fb2e3e6cd2106e4f84d2680471b3f965fb1a77a6c20a34. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:28Z), 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/BGA671634315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b53c8d9463bc99ea7f1d32554836d052774e67c4d7fa22135579a94b6ae94f. 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/BGA671634324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4734c1c221b77a6bfad0f37ba24bf97f8e9e0f39d2dc45b01960bef5dc7e51b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:56Z), 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/BGA261845801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3bd2a2f2c65f07eb337a73c304a39e25203f5b68dc6bd9fd87bf11ec26fff2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BGA261845802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bc17ae19b7d80a5bd3c22047482d2b493a01a05de612f8d1c6e8dc2ad93d36. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USV351428739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19c82757a05744ee3a4421c13a51f921c2229bbc8a17f659d10e9d0d3ffe12b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USV351428745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fbf6c86b192deaf8bb7e8cd351cbfc2cab3f48c4d22c4f324bc96e5eb723f9. 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/DEBL61057599.
Doble Insconsciencia (Falsaria) - Bolero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd801efbc4161667d3d65366623fd91c495a2f565b412fc77713810c8bc068e53. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMBZ91301171.
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
Añejo Carta de Oro: 100 Joyas de la Música Tradicional Cubana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae22386f6e643a5db6dd92be5e882a5e4017408c9275f94d1073162382cfa5d5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CUA021306758.
Veinte Años (Arr. for Horn and Orchestra by Jorge Aragón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfe9fd888da9f8b0142556801b0de8f8f3260681ed3bc966e14b14779838a5e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR50X2287812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393467a60089fdec21364e1f59b350c6d69ed235566b9c774147bdaaa14a0d2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USV351428755.