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 0xd3ab33b54b682c76e161b7049e76604557b86b3232f5c4da1251bd88f01e9035. 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/6eb229f6-f21d-4ade-a6c3-732b36d73075.json and https://artists.proofprofile.net/proofs/artist/6eb229f6-f21d-4ade-a6c3-732b36d73075.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 0x46bc725bd4a640c690e78af37d3d7d0e89294fa7711bcbaf822a3e5bd21aa180. 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/QMFMF2301057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4c6d4e0dad758f0db448b8e8553f18ede38aeeafcdbb47454bbe6a96545035. 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/QMFMF2301058.
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 0xb56978be3eeee88c100448ff54cd0a8480b7dc81a89aebe0e62482551782f953. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2463468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ad8f4a52a4056b3aa6a58bfda7b400421cd0803a82dd42633a47fcbb33d84. 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/QM6MZ2440973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb5b3465a24c0df918587d54e9dcfaf0e2d30f1bdb9d2b38c4f92c967b0a5e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6MZ2489053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25602fb130bc425b6b953874c4765ce9b0ba78e907ef2e2aae2dc531956eb283. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:02Z), 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/QM6N22479337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a3e4f78eca15a8adddb291c0b4e5335e5b4c7f9db72d70e8be91d532b33bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEPI82430603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325d92c19ea5c465ee9c1d4fb1de8280c9be4fcb5ffaaedcf449fa5e4fe1c8f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX5MY2478890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4cafae77225854824cf4a928cca202b5232bd2ce32491073aa95fd250f493c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:17Z), 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/QM6P42569956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840fe02f1101b375a6ec230c0eecc3c160e45b4a4e6802907997745c358dd8d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42569955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61abe32ef7a30845113e3c3a8f8275c40514ad9f48e2762a0d42b641030b61d. 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/QMDA62511458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db4a3e018ffebdb6dd775794046ccdf7b0c6fe3e879295489c51af24b7d0830. 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/QMDA62575469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee0443b1ef1478b6467d73969f3f13e5cf5630167893ea7d5fad2e1419ccdec. 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/DEPI82326190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a825f830d9593caadd387e90dc30fe636f234a412b1124d23f5ef36f1615f. 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/QM7282368933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5e990b0dd67d83a2ad31059d3ffbe6418bbe200b550f6e229049cdbf139f0. 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/QM7282368934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c935e3551f28accd664e803b1ab88522540b2598f7870f8e9fdd39eaf1798ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22461932.