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 0x939d5f89832c43c78f56553db3944c19d4c1b3f7b1154fe139f00ca794dca3b4. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03d7463b-ec19-4ec1-a49d-faf61962d04b.json and https://artists.proofprofile.net/proofs/artist/03d7463b-ec19-4ec1-a49d-faf61962d04b.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 0xbdfbe64454a6e2abca9ed063592d1c50e5390b02ee81215208127ef8a6f7bf54. 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/USDY41706799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d8907e4187171dc81ca154e27bb46d0bb67218327fa4f02d70b58bfb0fc26. 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/USDY41706800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d56d97754e962cd8e34667f9c2cdb081cb110be9f37b03c1277a435f505d6e. 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/USDY41706801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd04b705308b219754a5a866c2270d2db51e3c470f857d4404c36ed280a0cbdb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USDY41706802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5eef0cb01c39e0786ec1705db9f870b45dcb8a7fdb4429c58eae990283f1d6. 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/USDY41706804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ba100505d9eb8b4f7eebeec810a5e3be6e08ce2578aff4d7529defdc25f64e. 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/USDY41706805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf351326b4ca992365b5eda7b496108a8786ff24f00116889bd5788f866c386b. 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/USDY41706807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bfbe316838378fd7df8a8c4afef77587ca8c42dc0741a54487e684c189faf2. 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/USDY41706798.
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 0x3281f39ad4e66629753c1ecc426d84b3841a2b353068372f62f903c35f20ec91. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USDY41706803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dcc57cccd51e081f5c8ff5a59eaa9a531e16695d0d7846f15cc4984a47a16e. 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/USDY41706806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f6ef74124049cbfaaa011cf54a6359e8790d95901c322894e06ce6942fc56. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USHM90964458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a29c3aac430d12ba42e706e9b90d2098f1828b4f198b8cf40ad22b650a9728. 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/USHM90964459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ea2e8fab63721e11dab649134786979c75cf73c0763874ef9b922883152295. 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/USHM90964460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71580b973285c440a3a64c19c3998e6368fc14528c9e111f746a28bb2383dd4b. 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/USHM90964461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34634cc40642c488dc3d3733b5425e41582b5f029d2daeb9e6990a38d587cb74. 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/USHM90964462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00491b387374422126d044f007146ffb5719add94e1deb2e1427da246e80eba3. 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/USHM90964463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaf5aa514437a9682cdfd62407120a8707a7352505fc6fddcfe2fc38b00079a. 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/USHM90964465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a971c9d83e6cbb3eb592a8d2e8260e7e9d5a5760b9c898348984ed5e14f5ce. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USHM90964466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535a36d84e27e0be0afe1db9174c2e71abfe0fff4f4afa762f71d74166442717. 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/USHM90964467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e92338d19d2b92bb3a4d0c665e5668cb82fc5ba2e9518ba7f1848af6390b3ca. 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/USHM90964468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f416f652f57933ab4923accd86bcaec83aea6599f82bec0a6f10358ceaf21. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM90964464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9590fdc5b4acf2fe8fb619f53b3884f3486b06220cd02adfda3e5f55951cc718. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USHM90964469.