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 0x1ce0e20629776fe743c2f457af8ec71b028d1427b22b2fafeb5694243420d82d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c68a02b-254c-4acf-b826-a0ffcd38f5e2.json and https://artists.proofprofile.net/proofs/artist/5c68a02b-254c-4acf-b826-a0ffcd38f5e2.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 0x7bb9de400d4ffc2434258d32aab1520537bfc8b6614f1da10ef2797cb51e33a8. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USLZJ2339109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321a27c09a5d63a1a671bcd04b43dbd1c5bba2feefb835bbd6ed425e5d138401. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2339114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559d6df83d2fd4d50a1a28067e1ce33272092af85bc4e1eb6dcaebc88f18596. 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/USLZJ2339120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca5491c16d33ea77882e0bc1bc060eeec3c802366ad0556372dd45e61a2f75. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2339135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746579a7dd9e322ba2ab8eea26abf29fc6e3b9301b8a3a023d0aaad0721f2be1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2339139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1392f823b675bbdb19362ec11383c01a8dda3f0ef2fba522ee0398dc8d6aeaf1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USLZJ2339197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea632ed6782c6fc19cc51e37898f83dbf162584e7e2c2fef4f007fba2bdebf7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USLZJ2339198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f90ba5ab9bd0af5ea5b31f77b08e4af15afd61914dd30cc3ea78f411e5838. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0263eeddf796b223438de03a0a189d99eecceaa420cf61b8c6774931fd4287f0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USLZJ2339206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce083726849b03335718011930d0191e475409d42a8cd04d995faf4eeda3fec2. 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/USLZJ2339207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa576bd7ef55ab220ca99eda9da1f5b518baa5fc45f0733e297764a9b863d7174. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b7465a569d22601f73c3064671a601f2d07e3f93baa927cb40fafc7f97f1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95032172722b50ccd3d9ff6266419bef9fbeef9fdbe918f3d8ee5f5b7786b3b. 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/USLZJ2339220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aa0a38ac93ef3c02de424501b0cf091d6c3da747e24cbf4ef22b8d6893e678. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USLZJ2339230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac447df4f9fe0a091c7179ac27fb087490048b57dd86aff5d541456c210c94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210b46836f60be78689b5574a8881961c3617ff8824799bbe3086909cc821b8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca9d9afef24db55a08680d5d9e9f6f8290f750e541cd911b01eaeb0c99e28e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USLZJ2339233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f715a45fc720f2054eaa3b892a8fccc7174587dee905a1f6cea5d43aafc01d. 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/USLZJ2339237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc49015f472e8f8a9e85cd817dd3d02842dd494ec73c99fb858126636e66bdb8. 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/USLZJ2339241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272b59d5482e28a196d9d9986d805ed95316cea8ca64c505176e210031f5dd3f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USLZJ2339245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd184d869345d87cc6b7b468f1af86915b45e4941cf2605f75b09ae3a598d0d00. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ2339247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdcaa4f7d263fb935b23970669c44e183f4b2dcb88d69efc700832979079a09. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CA5KR2073091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f0e2dc4fb11a475f831c5d8ab5a1d12160fa14f4e7e63580134b5501275ed0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CA5KR2073092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408fe8d680f964f9a88c5ad2e73710d8aa5fe0b023df9d0d1d7eb7a0ae467023. 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/CA5KR2073093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8bb81c2c26c79dd89bcfdeedd9dea87e5ee8ec797fe116ae18de709d20f07c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CA5KR2073094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998f98a85171b98747b5d8f636715d5ab1767145f8f0c92250525a2ff603ef76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2073095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82f386106b81af273af5a5f9bc50974cc79a6154fa6d1d5e1dee9e0a4a881f1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CA5KR2073096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620f3d1e84bd1092e3c086e1cfea3465403eb94066c99eaa1e7b70950297cc7. 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/CA5KR2073097.
Canto de la Selva - Marcelo Berges & Resueño mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7bf9fb671e90776224d8212b3617469613bbd60072a740a50bbcedf5263cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2073098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb594bdda38e3eb201246c2ec86f25fe6c4db7086078f96c3ca850215235d67f0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA5KR2073099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e9c3af7a0a45eb22c6123b40f2624598c0634364999ee45062ff334f3449d. 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/CA5KR2073100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e3ea61481d2f58975b1975492564d2d2de9a24667ee75964fd5e557b9b9395. 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/CA5KR2073102.