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 0x0c567ff1b0dbb7797d41402f32f1202e953f3a13871942892fa61dc7c34fb425. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edbf048c-1cfe-4713-b0d8-fb1afd5eb7f2.json and https://artists.proofprofile.net/proofs/artist/edbf048c-1cfe-4713-b0d8-fb1afd5eb7f2.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 0xf278040471d447311dd56c75ad26a04dda5025fd91b05b1949195f01957028ee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAY2235507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac408beaf58b64fa0a0c5f2876d07236a9c7b8889a7167bee31b457951b72a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62343150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f64fea019fc88a25df0b8c5a72e611c3c3eeb2cd63afbe3f5fde26a3ffe0f. 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/QZTAU2389665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4456e8e9beba89cada93cbc4d22c1ff14bde92ed90f7d29ba8f0f37f945e9d. 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/QZTAU2389666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14146d41ae931ffe3be139f55aade067850a3633e55378febca91fc964a722. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAU2389668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bd95b463b0490f2cf7c356710bf7a6d61488f6e72f17e98e0d401345d3eba9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTAU2389664.
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 0x4cea1efe7f89e77cc125fa6427c590cc47de74249a2db9a658bfb6a3cb9f85de. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZMER2394066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67a9f18659a319d631d81a7d1f1380054c5cb716da6dc8e9b3184e63692f5b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTAU2389667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad07b89cc8b0f0f858d90bdc5397a92b65b7b3168619c7d508f690501b3192c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNC2443185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffa1182e0c7801ef74a113f360a6a8b23238fcc054cb3895d630adaeca8b7a2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:18Z), 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/QZRP42469925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e44574f17e56c8b2043fbd318a2d94bf2d15ab9cf64c0cedd39b4a66a09ed1. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTBA2497741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f233ea2822eebda8aec08ffa74b46329b7f4c2749bda1846762053d4b7e6ef. 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/AUMEV2521030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c700f5af79486e7cf0af7a31e21c34bf1118cc5cb8ef0454048f9fd0bd6f7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AUMEV2555336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf547908e5b6c6deb264001ce836cc78a74315890e9d9419603df20f9c1c99892. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:01Z), 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/QZTB42583633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b8394ce29bf023e96c7db00ca41f135172d5493e5eab9876e8c9796a1c063. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2525838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712df5a5b946c2555fa1c6844d42cdbdf77c60bf32780c1085c031e2bf4a88b6. 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/QT3F52537615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732c2362465b5cdbd7f73058e87c12ac6632237de062f9cd5d9fd0207745285e. 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/QZTBE2332605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a6ce1f9d0a303322c9ccf7cc3e65fd3e95f8f5872c295cccfe41545ee5eba. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:29:08Z), 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/QZWFF2434029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e14a759e6b8e34829c2aeaac015c21b4e5ab62b9139a16798f5a1f1ab44e7. 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/UKEX32500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fbee02d0940c4a09c205ed7f31801c292ae1f79fe693ca784014930a8ebf64. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZMEP2254312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd47b21355809946691d4a80ed004d0d5c68c4e12f9ae087bbff43c205656a4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTB32313996.