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 0x865775a897e3c7aa13bba9e03d02d83d5d78756372956d441d57bac3c3c9d670. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57860182-9df3-47d6-8764-f12d2b05e435.json and https://artists.proofprofile.net/proofs/artist/57860182-9df3-47d6-8764-f12d2b05e435.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 0x763b09b478b7281d00f71308e05b9828c94d20b228b1023ba0265d163feffe7e. 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/ESA081802044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc831022c5c3b3d8c3a448c324e052dbbbf13773ed4aeaf9aafe727671f2781bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:18Z), 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/ESA081802045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0257f7d193a3afdec2e7c4a9e8a57fbae652c0ca7e60f06d40103ce709956. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ESA081802052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6adfe9c327260b6a2cab8d3b3a321d9831a117544d397f202048b7367c5b1b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ESA081802041.
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 0xa5729eb9b5c1bdfed04377d4b3c2641fcefab84659c7c5241dc7fb462acaf089. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA081802042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1703abb2c085c21b143b3e8700a5f8b90aab0365811b202075e76b4d70ee9e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ESA081802043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec727e410114a37431361848ac0ce4c1afc759b80bb455d46594c50340fa36c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ESA081802046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d50ce5f4492fcadc8c5e95d83c13c1bdc05d754188fa53a812fc7e689f0a28. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ESA081802047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7965e7caace2da669f3473e6340cac9c5661a9c748df38e63ee8ea7f7419526. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ESA081802049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6914bba3316841c1c1e6190150f87407851e6ad4c8055aacce9ed8c4f450984c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ESA081802050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98193e2d8ed8b81ce9643b5534a03b4374d9d4e60b33384eb2b73fd7c1e85d1c. 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/ESA081802051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0543326b738d05cbe2d34edc4c7c761eb56b883b5d2663a9173662566da701. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5592100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d4376a8e7e314fdd00c47bfb3b4b4715f8aebf5ce5d3f0243984729c4137bc. 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/ES5592100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dfd23a0996d7890793bfec1711a2e48cbcc1b4cc8c5db74867271a05ea8f1. 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/ES5592100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5fc8f34a607965b905ae6182def202c96bde5efe9e419e15c817db0281358. 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/ES5592100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea98f610b8bc90afc8f45517b999d08d62099fbb0357f3b9ee134f5f2675967. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5592100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102725c254dcc725756631c432ca35f73eda617f9160afc403e22754c95f4ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5592100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b11c5946781278a444db8d849cdd72babaea5563a7324d7e36ce93efb1f5fad. 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/ES5592100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245c7102bd851eee04991f1ed877ceee646332351f503082cc83781d776c9ea. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES5592100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8ffa6e8c108fb37fa976688d5a6e6456db6abeade923fcd8c9ae637a452a42. 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/ES5592100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da954570555e24eed99fc6d939268b564dd6d101bbda5b11e009ef630b6dd1. 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/ES5592100071.
Bilbo Hiria Irratia, 20 Urtez Euskal Taupada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbff8884dbb03090d933f19d6b3961d3319cdb5e86522a666daf2d4b18ff49b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAJF2571408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd493608c95e737ed1f23d965d914e1688048099d6922afc34b3486aa265b2fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAJF2571433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ab767096bd505688beb52b21a79fc7efbaf531bbec234eb8a92d75c4c1727. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAJF2571451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b8a6c40d66e1a110c3c1e180cb432519399ae9797ad7ddb436e50b3371f72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAJF2571468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc27cfd210e3768eb45c2d26f61a31fe14d2fb6e07aaa940d6442b68e42f373. 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/TCAJF2571383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0228becb3d9a69ffb732818386a2f44d41cf306927d319329cfb2543e5f47f3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAJF2572467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f42be491e1d8bb4c7f80792692945263e8db08fbdbae4e73b234d14b986a90e. 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/ES5591300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51e9af39e07c998abc7fed8f0e217c169b269b90296540558f46d06bb1079da. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5591300327.