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 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 0x91341f4e04d58bb9bccabc462975690e343f9d17ea475370faebc234202ca0ce. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/500cb978-62dd-45ba-af56-412b90b83d5b.json and https://artists.proofprofile.net/proofs/artist/500cb978-62dd-45ba-af56-412b90b83d5b.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 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 0xee6e15aa48391f892bfc9edd9f2e2cd9117f864ddcfa20f93093b5e7a240c785. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM3DF2205425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc44463bd0d8794b66724621a3bc9e630e28e74ce5ede499b816a9e33b1cdbc6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM3DF2205427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e9b37c5dfbb330a089e37169ff730922eedcd1a0b0533cf1b3d8ec1ed41f95. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM3DF2205428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dbada7c05eb6e0f60e254f0ac73b026bd65612437649714070204835fb56a5. 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/QM3DF2205429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be094f25319fe5b5bbf3dc7c51b19ec644f4ae05a40c3f0e0c2851b87b9925. 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/QM3DF2205577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e0c9a59a4d1be10158bcb9b428b24a84ecd82d5a38cf03dc0945df1b71d11d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM3DF2251445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acee86d4ebe5be12042f7c33470e595b47288599de5167ae87e682864ac765. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM3DF2251406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb3e68726e5c5d7fb1b52bd749a9eb5cf1d6b72c69f2f6759512a888369b712. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QM3DF2251534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a3fd7aa6729cc6e5eac354a9994591f7e6e9e32fd5722bd452784e5e4e6c63. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM3DF2251529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8829ca224c1056b6c753db4fd70d8351aecc483d37c5fe261f3c2f7e9468ff. 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/QM3DF2251468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2100ea1873294e97f17e9b12492180b3b9f91ad0db546ef2cc7fda7a2721fa. 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/FXQ022402340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d70a1fae04e9ce591e5cd9b502bbf33151b82e4e923e3087a7dc7b71fa09b9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GB8KE2328835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf72d0a07d21acebe92b57430f0fb4124a464075e7d3816d5f4c917611e8dc3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRQ022102773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5727015d65bcec19377321cbc0fc352bd7fda6f108fae8eb263f3bebce8b55bd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKTFV2301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f8dca7ecfe78915dc04ba52f3ed7f6d749d63c04e8fb38dbf48b42177ccc86. 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/UKTFV2301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cdedba3accb92fe030f3cc961123550264934b0447b24737ede8d7ad9e8944. 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/QMANG2209288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f627f1afd6feb3341be9b40af40057576a0e0939f557f02813391c81576ea. 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/QMANG2209289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d36d2ec227a9816bc16ceaf00bd97646fe638967a74fe993f5e6181e93edc75. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMANG2209290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c65ed066e9790537494a4c9368607cfada3db4931c9ed645b58a58fb2569d1b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QMANG2209308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bab966f2412e08083d5d6954c0daba7d2b6fe16bc3ba45bc56065220d9c2f06. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMANG2209309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba622fa8e024be9c6b7d2221c9f956a225c3b1987aeb27f4c2f730c7438ed96. 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/QMANG2209306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b374b49f45cda58fa74419a58ac23bba1ff9de49c3bbf38d81ca71e96908d. 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/USANG2286745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8aee2b006888b41c93aa770f5bc8f7d5ba642bc37001f9a0f00f313700174d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USANG2286695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408fc4f08f264d8c76f44a45cf9b4c3410382b11dab858f133a159fc17930019. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2286667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f81c3d08e804ef5501338b3a2c1650e691ea79e2112f4bd4fb0a0c66f499d2e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USANG2286759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a925848676863da4bfd4021e618a4b7468852a6369193a348234a18da6c257. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USANG2272201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ce9610ebe764f0dd90b892bd4db1ba2c64eb2567c8fe1451f01e8e217dcd1. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USANG2272132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56909c608157386605c7c203bd560db94e89f033748f02714d00040edf5d2f49. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2272216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c71ec9cb359889220084195f7b723de8fea81d82deafe635caaf541a4ef9cac. 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/QMANG2248223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383e48172cfc6037934b209c160e2773b23cd9284465918d70b1be04e243ebcb. 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/QMANG2248229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381f95b9e77e9a8383f5ea962be58ffe2216048df4df0e417c4ba0ec16f8dae0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UKTFV2301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0a4f498b9cccee3f3db2fd5dc618c86e68dae8133e57cae0e25d417a9c4304. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USL4R2381093.