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 0x6895ed971e9a87a6369ed49be3a76bdcb4609425875df08245a09cb2b8d76c4a. 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/1533b6a9-5aa4-4b7b-91a6-5993ff9f84ef.json and https://artists.proofprofile.net/proofs/artist/1533b6a9-5aa4-4b7b-91a6-5993ff9f84ef.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 0x6694a965c00fe8bc024508b4ad7a3d8f52819ed2a06c1a34be46e47961fbc0a2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES5020800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf761396b43146c8d49507981df3311d0f1fbc8c28577f7552c9bb9d3adc46. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ES5020800188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b614f6fa6b1db45266e1dc85637a78dacc0e8e2e7c7bc5278a8fd2df2dbd8a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5020800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebb6d810b49a6fd7b04806a8ace95c459f1a929b2b3d8182b412c2c1f5e6364. 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/ES5020800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73045f4ce1a78ec2b113555acbfa560a6349ee9e87f2c5f4db2a7d71f5a3f87f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES5020800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdca5754c5987e0688a74a854184c0ca95a1df7a3ff35cdb9189c7f9b1b4026. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5020800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f3d92494d12954855b6b17f36baa6d7b447f0b6d30d8ebc0b7986ed6cddc9e. 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/ES5021000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779dc52c8b39b247fd1f3b589e5b71bd727721afcecc2f5480565ca1cb22ddc7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5021000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6591f919d5b787798dd6cac1f2bbc2bf2375d4cde7176c540a598ece0c86672. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:59Z), 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/ES5021000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de8c555dd109e52c878609d7e4366f3dd91364b422b777937cdc73aaf0150fa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:40Z), 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/ES5021000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5edbcde96ed87cfafb08cc154c985788b68678a1586652447d4d2f555eb95a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ES5021000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af20670cf8dce51c6fa54203fba8374ca6047bc4b1732966b58714b0fda3b82. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5021000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ed4f3e9474b4904cd98d01b16eb5a6c023dd9a7b3bc6ca369ac2e3b48bd44. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ES5021000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe405da367b99fd46f87e25a5be137f10aa09e28b926015b4acfc4bf81ef8ab59. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ES5151400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c17894c9c8533e3bedcb3abe1092afdbb95c91cfd80530d2a8013d1a3d1179. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES5151400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb4a000d06be70151f31abfa6dbb1749be075538c5ff4b115b87299ba1d4a3. 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/ES5151600085.
Los amantes (feat. Iván Ferreiro) [Acústico]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8bb2c35ba2eef65851c7bc3b00f2397ccff5ad50969cc78d0198fae6eb7bc. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ES5151701221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a415325de1a6a949860b63fa7ded9a8b08fa64ff2dae757eb2b4176836ef075. 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/ES5151701219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a415325de1a6a949860b63fa7ded9a8b08fa64ff2dae757eb2b4176836ef075. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5151701219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8bb2c35ba2eef65851c7bc3b00f2397ccff5ad50969cc78d0198fae6eb7bc. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES5151701221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e50b0ba98f375ca0e9336382676f991023b46661e647a6e716156ffdd74491. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES5151701222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda3e389ccd36efb9bc11eec8de5346a184b80703db7f9b44b861defe0c96c9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5151701220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417e89d3fe0dfa79d04e120a4ed6ca3b4152d50704dc9624698a5f63702b9a51. 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/ES5151701224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a31692ccc480006c01afde30218c294f2a3e86922abfd3c2ed35bdebaa79f91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5151701223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03b9020fb616d78d93a55147ef3e292968415ecdea459e2b4c7b8748a684ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5151701230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661747074986293f0b0da7ec3c9b2e9e9f62f3acf03f09800f2015c1c1262900. 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/ES5151701229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ad65b46f2afa4fa0cd85b54129b4e30f177955307e276f753d51caf8322fbf. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ES5151701227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1021d64087d39f4e8036743a711e1ad7cd97a93c8e4d809d1e14ea3e0b9719. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES5151701228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd6236a8bd8d00d2d7a786a0c60e98d21baec6bb1f828037d4a09516a48fbd0. 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/ES5151701231.
Todos mis males - En directo, Circo Price de Madrid, 8 de octubre de 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f847332811a74b54e182607dde7b0982427dd76830f0e7fcb39818197879743. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES5151802483.
La tormenta - En directo, Circo Price de Madrid, 8 de octubre de 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1785fe616b20a366cb07dfb2eb85574e029f4a79b72869c2f1a8d65ca41ff18b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ES5151802484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd639bcf3a04b4911025c9182c177c3545896b6a5d7204892827afec76d09bb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5152200573.
Si me ves aparecer (Canción original de la película Reyes contra Santa)
Plan fatal (feat. Juancho Sidecars, Sidecars)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb00292e20bbf27e78d32d9c1d366079b2eebabd2f48b33b3acd2649dbfaf6f. 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/ES5152201532.
Los amantes (feat. Iván Ferreiro) - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8000bbe2ac07fc814daa41efe4d043a3813459112a00d5c6b635e38ba8d0de6. 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/ES5151600091.
15 años entre canciones para el tiempo y la distancia (2005-2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b974a1f6c3ffa29f4c2d8b3f81892ef09e9fc543b066d9c54195af172b5743c. 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/ES61S1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd90dadc5a8c42867d212041e72d86a623f6fca1a5d1b69feeb54d909193ffa. 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/QM6MZ2489062.