El Doctor is a series of mountain peaks north of the Pachuca Range of the Sierra Madre Oriental in the states of Querétaro and Hidalgo, Mexico. It includes an escarpment formed by the El Doctor Platfo
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 0x19104041280e99b67466de4908014e34f5aa654d1aeedceecc800914ccccf82c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/949d65e2-7fdf-46f6-8dd2-fe441d1cfa90.json and https://artists.proofprofile.net/proofs/artist/949d65e2-7fdf-46f6-8dd2-fe441d1cfa90.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679932753e7c076f090de8a8d742dd1ebffe60a93732edb40be9a3a437a0de36. 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/GX53U2002097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fb2f9a766ed73ee2bda51ce2df0a2ec3d1fd17d595b89bcde2138c36a7c47f. 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/GX53U2002098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc859511838c0de916dbe8325b77171762a3da305e79edccf9cd0b5ed7dcec454. 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/GX53U2002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6776116f568d1113faf6ba91961a1be44185fdf7f077beabe674c9dbeabc2d. 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/GX53U2002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adcda114ba20a561cb69512d1ee5c7bf2b267b3c512c108feaca944c1f8f8d2. 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/GX53U2002091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f13e7f987b7ce0234db2c4fa3de8bebc1efa69ac8123067c33ff6b236625e4. 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/GX53U2002103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074dc1cb2914b010423541d9c1ce2362f62ac173671b2c853850740a7c7a366f. 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/USL4Q1855310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc5a5e4842b2124e91f2c56246888d53af56d2c1323a486b6797573a94b9182. 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/ESXN22098091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e14af35ddd1d1955bbe87cbc0b1b112690af587d4fdaef2cc8a0cb8dd705d. 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/USL4Q1855309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f3c5a2a31b1716caa5aad0ebd07c4148519cc9ce8bd7c1f3b7a33caf8e55d. 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/ARG991043629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb9f958edb560b5e5d424174758859cd322426106a6ba870cc45a8481212207. 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/ARG991042815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae3c1e764ae1a80c46dd720b36df892b41ca3c54fa28911e177ea4d2c62b46. 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/QM3DF2127918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56998afd563b9b4c0a7e804d95128d14c9a907f03251952427c72cfb026c46. 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/GBLFP2044710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d29c532523616592167e2cca6605da0d4a50ce14d69e98929c544ffa44d29. 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/QMDA72410903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dfb8a5ecc987b6a3eb77efac440b760e94f819e24379d73741cc1ef8ab2ab4. 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/ARG991047169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b7f46a3464aeca3415c3a8cc8c092c38210e6658facd2887676474144f953. 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/QMBZ92423735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d214b25545ff8fe202bbce0db29bd664a869ef88a7a666cddf75b7e6ab2ec. 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/ESUM72402021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906e309cb97521a9fd4289b784d79f16c4df915706466d43adc9180aee890d1. 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/BK4DA2535259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca43a98681f852611eb8c054120001e99fbf8ccc43b5504a7c357255cc748988. 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/GX53U2540327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cbbcec5ee22e4d759a732b38b03d88707e69982ad80465d69953b4aed077c5. 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/GX3Q92598449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf23275f0b322395cd89dbc4d38b11fb06da508fccd7da6ce1d6715ee0c2f9. 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/GX3Q92536041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a1f599985962aaf750ae4eb5d66ba9e4ab32f8f3d24599612b7463d712643. 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/GXF9Q2474475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d29c532523616592167e2cca6605da0d4a50ce14d69e98929c544ffa44d29. 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/QMDA72410903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545084ac8147bf907ed822120dc2d6dde7d4feec2b9cc1ad96fa1b83fed7200. 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/QMFME2405213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0baf78dd8d2411039d1b8b2aeef6d56e74faa93de1ddc03484f9e77eea72a56. 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/QMDA72482156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388b6f1d5d988e47c8c63e8cda4c6b5391a3ef3bfebe8288e0fd6f3ece9bbf8. 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/QMFME2453920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545084ac8147bf907ed822120dc2d6dde7d4feec2b9cc1ad96fa1b83fed7200. 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/QMFME2405213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0baf78dd8d2411039d1b8b2aeef6d56e74faa93de1ddc03484f9e77eea72a56. 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/QMDA72482156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa095e4008fd99d443c85b2d221eeeac47f62c42793bb3d5125dc4c3f0baedc90. 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/DGA062353811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708711a83688d173a7dc2b2b44afc9850db5bd0d9db14c733a14b249d3eeccd. 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/QZNJY2156214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4d3d351d694b2e915a6830114855f19abea10a718e08f3ad16410a0f09026d. 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/UYA522000017.