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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 0xbaffa9e5a3ecb2ad82fd78ad5f40fbbb1548ece66bead82476bbbcc966797e96. 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/e90dd874-0124-439a-bc09-d0d937248008.json and https://artists.proofprofile.net/proofs/artist/e90dd874-0124-439a-bc09-d0d937248008.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 0x20199491ddf65ed055f298643662aae54f9d701bdc858fdf9ee80ebef0248d1a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBVVQ1600537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ccde7ebb93320c1bc15fdc65ef0917856539c57c761312b41e09dfd2f6bf47. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBBRL9610060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f73e81d9db2908c45f50540c19caf8c1ca1f3512125da1ec56bd51dbc0dcd7. 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/GBBRL9610070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61050c13d0ac2886e82cdd037108e0561c8e781b09a456515f9753025d7ea73. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBBRL9610080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584fb5b75ddba66a75e2ecdd542930b05edabe3896ac646272b6009f57319bb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBBRL9610090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ead8a04ba100c9c0e2ff0744de1f187975fc8fdac61944507fb93b0896854. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBBRL9610110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5adcc98d13e59eb72d6b2f0f6e730ae02c7eb6b273ec4277e89153d19f0e1f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBBRL9610120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf331ff9ce8f5cf627d397af7da9410accb96d62651abf2319aa9a8ca6c96e8b9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBBRL9610130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1502c83d252a74d0b34b1577bee1935c196242a1ce35a478e719d3b6522ba9f0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBBRL9610140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5e255021210b6959e838e06e1c1bc94ba2de2192169d76e0edb07ed3c60ef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBBRL9710030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bc6da3f8a83e9d6ce24d9d23d062958e71058fd6fe7dda7fae6aba8cb907f4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBBRL9710040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616f0cacbe1b38c6af337829f7ca4d3b25909ced8cf8dc0a802fad30038f6a41. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/GBBRL9710050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e4a885f5808c7020b32637f97eb761854d2f6cedc5278ddc4dfa343b241acb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBBRL9710060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aeba4ab04144f3c2102a2c947864a4e6fe2aafc4785f09e24940d17a099d51. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBBRL9710070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4be218b073fa1524c0ac6a2735a0bc1650948626834a3217d601b622f4c8ff6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBBRL9710110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b7f64482d37c7389d6ab22aee8e908178c6b8b9690263b298d5e62fa1034f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/GBBRL9810340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b45b823273a2a7be61f765753e10ce0bb36ebcfd677ee460f8687c502ba0d4. 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/GBBRL9970070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae850305f17da3444f779ded091c35d246886f124ef8b2d749e44e57fe7c693. 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/GBBRL9610030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0315338e01f9e91cb6fdb852c8ad75abf7023316c90be611bffdaf8741d0d56. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/GBBRL9610010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb6dd16ca939ec6136bd0794d968cecbd0b6d4b7330fc27507e57a1c965598b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UK3ZH1300824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8daed821c68537acef101d032b42cb57f1c464679de0beb1e5bec3c3928096. 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/UK3ZH1300831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eee89bcf4a37727e26165eb2cb578e9278adc83799c482b2c8c357886441e7. 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/QZWDW2490333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b45b823273a2a7be61f765753e10ce0bb36ebcfd677ee460f8687c502ba0d4. 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/GBBRL9970070.