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 0x9565473855dfbe27120834c78113dcccba11b66c29a578235b34e5c19b79805e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5d1563e-8eda-4a6c-8ed2-24b5651f4f1f.json and https://artists.proofprofile.net/proofs/artist/b5d1563e-8eda-4a6c-8ed2-24b5651f4f1f.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 0x00f8dd64dfac94f26f686606da08eabc3e0266c7ed7aedf76b3f93d481c78739. 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/FR59R2049778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fd839725e0523ecaa20412188bc99f838ba721780687926f5fcabf90ea1aa9. 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/FR59R2049782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1ffabaeb0938bab18416875fab7f18a92fe19e91e4931c632421eeff7c06bc. 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/FR59R2049783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3281db2f54167c6ea85d288d549e0329065cf0bba329c6c3ea32eae0c4739. 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/FR59R2049784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75fc7501467819548583ccd33742ddac565704dbec701360ffc40656053502. 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/FR59R2049787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc260c457d3c30ef76d8bf0782656ea51a5ffa7e515ab6654e22badcb8d617. 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/FR59R2049788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b0ad19437533f1e12a7a3dae4bbd4dd73714b538be2295f567ce34547925b6. 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/FR59R2049790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ae87b0bc64000a0988baf5d5e6c7dca2b4fcbb971d65ba8dbf2c8c7c4452f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2049785.
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 0xcc5bc306eb1fe06f0853eb8e61fc1d60ac4cccaee9489e661e1d40de527b7430. 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/GB6ZW1400387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f9c1753fd957d29bd19d16297f99f06f5c36c5c0f00e41f084f5675f85801. 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/GB6ZW1400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a3563eae0ed24db790ce9e82b1c93eedc9fbf435f2a34ac4d85862872c83c. 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/GB6ZW1400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b0629d4368991a9bfd0a3410c1fd5acb9b68fde82ad663be4e48414e79f8e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH2035078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107749fffedd1b007270262255e336c27b64bc058cfb778a3c361d4953a4e05. 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/USCGH2035033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd17d90bb0148555ae2f601fbafe9d86172c31ba06cca6703d22b76c88c83270. 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/TCABO1350519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fc30eafbcb9b7a7604e24bba0c26cd14896d15716e16a50b17f71d5c43c701. 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/TCABO1350523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6509c96fea76658d0dc44e6354f979f8a0c255ee3a0348f48027291909b38f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABO1350528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609f439bbe5185fdc23cd50ce53ec6e29993e9491bab3786bf2d80f51b48093. 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/TCABO1350538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9c45d9a4c9b7d47f041f6f95dca8d3813d1788c88fb6de0bbcdbfc75ff2cc1. 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/TCABO1350540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2cb8cf92e0bca08d9aab232e9468188d9719b1cf54f9dc7e02158b4fd36b25. 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/TCABO1350539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce8b7b513d9e5837593a570780a8a1267576a0f3383708d81802b7be2d7cc2. 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/QZTB32376037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb38da806fa78e26ebc6f602fc361a6d044c4c2bdab6bc5afca19d45c1a10b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTB32376039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd56068e7f50885c49447c5e5022b93d3cd95dc21825670381f147fcd044b7e. 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/GB6ZW2200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd93176fd27c161b863de496e20d4dd27f041c49e804c1b76dda02ce4219b55. 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/FRIDO2110763.