Rafael Calixto Escalona Martínez (27 May 1927 – 13 May 2009) was a Colombian songwriter. He is considered one of the best vallenato songwriters of all time, though he could not play an instrument and
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 0xcbde7956091532d794ae750809a771f9aafdfcea568a09e4a01bc4c5d1ce9fed. 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/497e34b5-09a6-4179-81ae-635093dd0e9f.json and https://artists.proofprofile.net/proofs/artist/497e34b5-09a6-4179-81ae-635093dd0e9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Homenaje a Los Grandes Compositores de la Música Tropical Colombiana Volume 3
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 0x6ddd5e7d55fd6f55afdde97047a6b6e49b9e72e0675ac53e24da7c9ddc20c594. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USR010810734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e9843966cee6d294b3572dd8dc90f41b0b6331aa6aeadc6775863b3685592a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USR010810735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b10ab4221f7b1c632e515b85568f4f9c0bb162aa1da53b05d986c132916142. 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/USR010810736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f45a8a68c1b4a448f41ca83202d86ca08ae8803d89bb838531cb944f11034. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USR010810738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4c9dd230aedd77df2fe8c0d5af1a671267f939eb85c84ff679f30b26031a3e. 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/USR010810740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579b9f85b75b6d4599241522194fb6f97d68c93d7a6062e3dba6afd50af10915. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USR010810741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c90ba894863511e2230814ffe3839ac5b37368fefa5f460a3836fe9ec06e7. 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/USR010810742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad2414de02e4145299263315e7a5f0b45e84cc19a7c074486972b3fd055a1c5. 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/USR010810743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23684fbd237b9b17e518edc61bf847cbea237681c3b4fd8165b5095195a583b5. 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/USR010810744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dc1143676fccbe49ecb3342933d21b746cce432b4473676dca24b16c3602af. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USR010810745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81239582a4162f6fccbc1de7612167b35135063ed19ce1b52fba4451b0d0099e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USR010810747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfdf55f5a8739820e925c5fe6de09ebfce414c392f839b0ae237ddaad8310d2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USR010810748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7d3b47018fb7a771ae992288229b59b4c6e33265bd611456ca24800498edc1. 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/USR010810749.
Grandes Compositores ”Rafael Escalona y Julio de la Ossa” 100 Años de Joyas Musicales ” (Vol. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69322a8b867f7a82c076468027e2f896996ed901594f04b190fa59e50e1d6e4e. 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/COF019400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff18e7790150a13a44060dfa13da24543a0c137f2b3f56faec8cebfaf940e4b. 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/COF019500862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d549f436617945dd7849def17b9a968470d68c24cf4ed0079daa019a357b6. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/COF019400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4ec7fb1175c015a199e125bce86c0db5cc858d6aae5568690e402f401522b1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/COF019400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7fc6f0779f9e218c61abd82ada83a57fbcb98e61b6a210bc5d3838e754bf87. 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/COF019501859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b717eeb10de847224d50b7af1a995edf496e41c650ca17317401b3171bc17. 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/CA5KR1928047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308fda04bf5d34e80e03dcd694a8666afddfd55ba5f462ac8ad4eb1e5fa88fd0. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/COA6W1700446.