Laetitia Tamko (born October 25, 1992), better known by her stage name Vagabon, is a Cameroonian-American self-taught multi-instrumentalist, singer-songwriter and music producer based in New York City
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 0x78a730d558062a10eac354b8ca798845685ca16a7eb3c35878e3b272cfca91cb. 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/93780865-abc6-423a-aa34-588d14ebb3cf.json and https://artists.proofprofile.net/proofs/artist/93780865-abc6-423a-aa34-588d14ebb3cf.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 0x95b10ca475773365c316747a24a5164eee6521cc75fc6a074284621ae8330f6a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USNO12300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a803c89ef0c11cdc1f81424411e3dbd914d50a45c996e7ad18cbb84b2548513. 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/USNO12300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b2590fabfda987fc04c86fedcfadd5e5b65170601b2208e26b66d24d6e07f2. 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/USNO12300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8812c373f78e9eebf52c661dcad8b7943c6634b4948a8be2affb3cfa752849e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USNO12300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f2fe19eb7817dbfd22b200105b0a5539ec6a60cd02ab9db618dd97cd73d744. 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/USNO12300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2fb63d707e81b3e60cac3a4ef9042bd1bd38f56ec8ceaddfd8f506741f55e3. 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/USNO12300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda9dc2e62fb027ab504fb68a5f916b3e54c433144cb2938f9a32345345a026. 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/USNO12300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a98343af29f7fb3caf22b61ab0c83cc0d61717d3c34f5d485fc410a7e44ab. 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/USNO12300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e69018fc1f47c58b848ffcc83f9bb6097153387a9a2f7ba1700ff381227c18. 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/USNO12300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f966e84e363095c2d2d3c5a899d13777aade87374506cbe79a97f5fccdf220. 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/USNO12300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dfc16ea6fe28aecea48f2e2a897cc2e29d2ba7e373a7c5f785171dbd4b51b0. 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/USNO12300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb278c64bb829ad23af35d39a90c3a893fc1d8704f21ec6c42b6c272b898afec4. 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/USNO12300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1a52d00111ad73ba79c45071ede770503cfb33173584306fd8fdd8a1e9475. 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/USNO11900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb5fff5f516098cba1d95c466b5ede4f795f08c4b52c811cba4fb8d025cd33. 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/USNO11900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42766c12f6902db948ccc046745e4221748b36465d18baf9fd6515945bcde605. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USNO11900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8909f2928caa07e4585447e96ac2be036c28cb89f0e4791df8c0caf3286649d. 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/USNO11900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25930cc3875713cbe4e7d3844f93d99d6f733af376a72c34dbde898ffa20e3. 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/USNO11900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cdb5159ecb9a4bc9b0c2445fb8e6cf746681970f0dcf107296a08ee4a28cd6. 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/USNO11900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ce575d993f6a2f30a6f15b0f15319c59951b4575201ffa456ca9f39e0466ee. 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/USNO11900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ef3a3f69ae16341b9af03dc182138e7e30afd59f3267051e5d48dc41901a3. 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/USNO11900174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd494fb6f0326b2ab7dec736b3f8e57ceeb9f522c5bc142b7b787053f25eb9725. 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/QMFD41600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae90284ac3d8a09d2a5eb9844e2cabded0da3c9f1c5937d916cdcae4b755666a. 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/QMFD41600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e51f76949c017afbd156f451d1c253f24c6915df40aac9a4bede4bb8a64fec4. 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/QMFD41600025.
If I Loved You (From The Amazon Original Movie "Red, White & Royal Blue")
If I Loved You (From the Amazon Original Movie "Red, White & Royal Blue")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533100c8fdbda16a672a90ff20a96fc9a5816533749e1d5dc4b49460a18aceff. 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/USLS52344601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a803c89ef0c11cdc1f81424411e3dbd914d50a45c996e7ad18cbb84b2548513. 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/USNO12300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034694656f9a29c9eba9e2212e454ab6d5ddd50bde8f358393788af3bf3ac28. 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/GBKPL2160208.
Reason to Believe (feat. Courtney Barnett)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727d97c788bd0b0457db54e6b4eb925e3eea42681dc4c7902992a2180798e29. 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/USNO12000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424061486fda2c705e3bf1811fccf515af76e36024fd5ee84fc5e425b576d589. 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/USNO12000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e083e67db19b208393df3d2c1d8e09d7f6e8028011f669dd65f9cd1b3c46b87. 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/USNO12000129.
In A Bind (Strings Version) / Wits About You (Saxophone Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995258705f0d6b117ac7139e20d6ddf76105ce8715fb3161d26d8fe9b620abee. 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/USNO12000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42766c12f6902db948ccc046745e4221748b36465d18baf9fd6515945bcde605. 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/USNO11900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ad29aedd04b36e095e1ebd568c701628935b518c158bac49faf872cc276229. 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/QM7281470394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3dd3e902f9a9a201ad32c1fe524120ca7da884483db8a5101382dd99b05189. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMVH2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d70feca269514e20a4d0a4d94a4b14fe6aa204d2a02b4ff022f27b2a5f8828c. 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/USCPT2116705.