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 0x457bd5fecbea17d5784d4c56157077c4caeb9efdee15165d18d38588c94e6fad. 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/879b1916-b375-43b9-b825-de056d60e53b.json and https://artists.proofprofile.net/proofs/artist/879b1916-b375-43b9-b825-de056d60e53b.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 0xc9f642334027e2b5aabfd57f22a893a0b13489d49a7a7f9dfba9d55a3f2d7358. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES5299600360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb953c0bc6b1de5c2216b0d27f8e35841587f408cbb1d9dc017b493d50e36696. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES5299600361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90796a5a3ee6e465e99694fad98ac9c22ab6a26af03ecf9b0f2fed41d4a68156. 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/ES5299600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae67525e0b57f6b2f5a7a75ffa61c7cce340d6ba28900d46c633a1a0464976c5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU2193680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a906b11e10bae544dc6ee261eea0276ca2b94c4349e338244d5f0d26018cc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKQU2195142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad189b8a49fc1322a71555b458b6bb45265e18be864acd32ca15b6876a95e3. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GBKQU2200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f776aff08d2f026089ccd60cea132fee5dbe6709d14c3c4b8c1da10119c27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2313613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cc928c6300564c40a934402145965c7f2caee0b05ca45b92bafda88e36a75b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBLV62314346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d471f4f23b7bfad00d40598047f54f4e346bb1387a68e13b56bb82142825f2f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBLV62318124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a5848892a3581d7fcac41441f97f07005bb640d489bb6ae2b593733ce92820. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBKQU2402988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3e1b94d0ba0003b254c94a38e799c21fe294aa7b844241db2b9d90aff4b75. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBKQU2494756.
The Anvil Of Crom - Netherworld Radio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f75170610185fbd1de2616e814268402e142c87551e09c3fc7ea1b664c0284f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU2496428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13462f8fe4be4c5fdb41a233accabe53c5455e400861d92ec4d68f499e9981. 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/GBLV62421004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e503b345208d50665e9ec8733392d5d267b318c2060cd53dce2538e801a9a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBKQU2512271.
The End of The World - Netherworld Radio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1eca46649c1c662de0b13f50766c8bbc25e546bdd5ce4113038d1b331520f. 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/GBKQU2518169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70fd574ea431673e9ba16457991e1b417a194606637f727e58d88f6816f838. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBKQU2545852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf079c08c6fbef460570eac6fab07c0d8b792e194898e955a978c0bfa3d64104. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GBKQU2551745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49333dd542629209fa2dfcacac5b0f1af662fdbc04ecc6e01e457e26513f8fdd. 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/GBLV62108401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce30f8bd05807bc5541d5314d7385f4ca05769975964505b05bb10b72210d81. 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/GBKQU2427628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca20f2bb674113cc2cdf822c62c4201b18ca76bb2fd8f702e87bbc49dd8c89. 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/GBKQU2400927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c669d427948e62c47988339807215a4ffe33b92ba61e0e31c7733b9ba3e58b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLV62313911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1baecd6e36ee2697645fa6cd2304ad1f649201c779c9d0eac9961fcb20acdbf. 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/GBKQU2192862.
Makina Remember (Los Grandes Exitos De La Música Mákina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90796a5a3ee6e465e99694fad98ac9c22ab6a26af03ecf9b0f2fed41d4a68156. 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/ES5299600306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea724bd85085817f9819b701282ea118c14f2f0aba715aee3a6a2ab7a941bc52. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBKQU2494753.