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 0xd9c904377acc582acd522ccf298646410dfaeec8868bcf442d1d32e9c8284250. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd29060e-e948-4894-9be6-8fc891fc04b9.json and https://artists.proofprofile.net/proofs/artist/cd29060e-e948-4894-9be6-8fc891fc04b9.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 0xa7549f51fc9ee412dc80fbc328f075e68747325bd39b46b3fa9c3eeefaa83c3b. 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/QZK6G2506029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9158de2cb45fb66e8d38fad248ea616b53a131040d62cd1676eda0c0999f7bf6. 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/QZK6G2506030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a352ec4860f3beb15698185bfb48fab4e2ed057d9effd22503259cb8a1465df. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570814683c73bcc0d7da9f60682a736a0021eecdbe7819c450d86bd9a6c2c6b. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZK6G2506032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c4b7ee073caa7ff5ee94eea24ac32d2fd0f02f936de60157e7dcd2ccea926. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6G2506033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66b60372fb2ea31270f1a3d4a0f49f8a28de3a01003268144f1365ec67a9039. 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/QZK6G2506034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8a530d23d3276bc392f81f5d9e65febd0ddcf1a6aa15dd0bbadc7be6aec3f5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6G2506035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ab1b4aaa2b4a2c7290c9c1e0688974089a67fcbd965f760a9ad23cd77db5e9. 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/QZK6G2506036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0ef1ed76a3cfe4c3ab5630807e94f356da96719576ff73e4ac70635fcedde3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5eb7e7f1fc8f3ec630e85d58fe18f6b41c49e24fc4cb1b2b15df2f3722c66c. 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/QZK6G2506038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e33d5d2c7c948ca1a3854437266dc9a77bebdf9f7b73254a960dc571b0cbf. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6G2506039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe335deb68f71907982e5451eedd0f8cb170a6568d4da71231fba5b46ceae5fea. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6G2506040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebfaafce7be29c10fd35b2dd2c8372d33874b5abe86c873564866906385c86e. 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/QZK6G2506041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e75a4dfce7c084d856bdf3932e504af59ad836bdccc6954c72777461261780. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7fbf5292a76cbf3e13f5d4c5364edac6fcf6b3dc0745f38dba4da6766786c1. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZK6G2506043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af656468c5c4463232d1402fd7c033089ada39e45b9a0a69e35c2d1bf4f5b8. 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/QZK6G2506044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b87b33720b282cf5bbd34b71a85ed21538360ba19f50d9a80428d87003adb1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6G2506045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c983fde6240cde5768a87b289a767192dfbe0cc38f919a4c0af372a845f7d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeba19176db9598eaa64f7981630e644358fb3d7bcbe39d047345b0ad46959a4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6G2506047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8023f03392b169328ee4f61224cf9b1f496808e6fb597d4615e2d16b7c2accce. 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/QZK6G2506048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8bbc87da9c1dd5cd2eb09f2d41e9e81f3847c599959298434647f2af4cca4b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c3169a6bac5ebd35bd3b5d789f78aa721f3ecdbef05771d72eb7b287c317f3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6G2506050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de0bc653d07a893e135bbdcf600d1c2e75b0ea7778cb7a5eed0f04add4f78a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2506051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0d05dace77b4029151c1937bf5460dee2c8cc61774994122404e9fbcf7b4c8. 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/QZK6G2506052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d3b110c982afb0c3ac9dbd05f7c074771c012a65c085daf2738e234387b45c. 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/QZK6G2506053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8b191b6378db727fbc0544a42269b64dfa033f05dbc964de29709737947644. 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/QZK6G2506054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d23ddbb7bf6f1cabe95681e11c96de633d0e9f8cf26915d4d253c0e805f8cf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6G2506055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d8dd2dc14ba4553006ce10e6cd6407e809bb1e4dfc4504ce3ad99796a950a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6G2506056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d4e09ebc8a94ef04e940cbfb86bdee2e6c75d8de0b97934803a548e1a0d83. 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/QZK6G2506057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1963216358d7e9011ec70f89be077e020d1e1c5239941192c05810bd0b8e08f6. 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/QZK6G2506058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e75976755eb474d0d304d3108ca937b04549b227dfbeddfc6bebcbd483d6f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6G2506059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec913e28a25fbce65b032d2738dbca04c60595535b9930350f9f685d1e7527. 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/QZK6G2506060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c3be2623994b33d08d14d6aef0b3df8943ad4b2059a8f57c3f00a25ea25f9. 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/QZK6G2506061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1a21ce505e4ce55e330072ea2fe2589c4412e6dba49dd666e20b974577c69. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZK6G2506062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4a47d0f3ae735eb6c44339b16335265177e19dd8f06e5600ca68bad0e9d24c. 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/QZK6G2506063.