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 0x7b49612f710af103f37a966b5fec661e656d16b06e9b51d4f0543e53ddac5e20. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36b0ec9a-b2ff-470c-873b-4f1c6f6c29ff.json and https://artists.proofprofile.net/proofs/artist/36b0ec9a-b2ff-470c-873b-4f1c6f6c29ff.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 0x6712e7388949c364979404433c94e940ee47bcbba7d4ecce300ed7c14cf0c59a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2518654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd605ff38cb0295085ce1c2728ebbd8cc19e91da1d413b4546d852bc64d0af77a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2518655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d28efd948b42eb2de4c381fbef5af04237f290967c427d4d22fd2574ab2c41b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2518656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7728105834967adcf9485a4a1882d8d5487f61830d92e320ead4933136792281. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2518657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c95a944d7597d8fe96c3f8287f46151c3298348b6ce33b02ac2f8bf171b78. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7S2518658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644cba38e1f5101872c820b12db86f40c64031fb0af5cea751950304a8ee2850. 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/QZZ7V2570548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26969e5a16ceb3de5866ee32a43ab0567dbe4c71628c23fbd9571207c0b8d0a5. 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/QZZ7V2570549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79b04281b15cc7e222f0e25ef844f8fa6b76f1aa696ea92b2c0011f193cfcf. 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/QZZ7V2570550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c1fffab6acba2e8673322fa4ecfbd6be4ea3efc639241e3744de89f3baba2b. 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/QZZ7V2570551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b9c00c03bd60f28ee5dc1aa8245ed49e1735cc73fb4d431a9a68982fb03088. 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/QZZ7V2570552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d235349718cf85c70674d1b54ca70ef9f5b75dbb4d34d0e4e6a3c4d95e62d5b. 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/QZZ7V2570553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce074422f014edb518d201c23e0168263ed943ebe801b872a1e1039036f070e6. 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/QZZ7V2570554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cecb3ec4e812af6f4d515fbee6f23e734582dc561d62fdfe3578980661bfe1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7V2570555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db1bebd4ab8a012c002b4c0310145b0df69a8550741375306167eb12b043893. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7V2570556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cf8ba32a31a3bd3fcc5d3867acb9a6d8b1374893264cbe8dc3978d1a2d3c7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7V2570557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a80c6b624bc1ea5e5b853f0eb9e2643e0ef7785475e266f40a3809d782e2f1. 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/QZZ7V2564775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a65c1cbab4cdb185b4d346d1833f6f8304a6094aa79570c716fedab2331092. 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/QZZ7V2564776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7a8a99229a13a5a21b8b9dedd4eca1d1197bebf16828b730654e52564d7c5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7V2564777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9066142811d7cf3ac6dac6ba790acf7ae7052252bb1b6b2c1d0bb5047cd28fc9. 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/QZZ7V2564778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95e4e126e48c6db4d04866f0c4152f2188927bf8838520621c4e5a201b4dd66. 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/QZZ7V2564779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cdaa5ab0f405b53147359f4824e6616330cd1d8aad93db67a93883c163b11. 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/QZZ7V2564780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea3beffa24b2b8b51b0f49beab953c44e8be1e6387f1c3a29e0452331986ca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7V2564781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b5782537c2c636bf263951fb59a4d790f77abd1f9c54b31576e6418a9380c. 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/QZZ7V2564782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b0c99023e65420af5f2b6cc51e4d88a55ea33eabadb68aa6847b06538c6754. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZZ7V2587020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255928ebb5cc69a84cf9828672ee54fe7a71301352133d4f1959100021800f60. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7V2587021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6d01e5b4aa9e0fa71c65f646d6e89b1c4b609a66c74c235db4a41ff6e1071. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7V2587024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4645e14b3f0e73e92d627b7f3cd2661636c2b23e5bbb65f225827b9748928a5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7V2587027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5b02d86484ff855ade036bc6d49f2d7b893172d69bccefa576672180c5beb5. 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/QZZ7V2589868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cdc613c1a362e2ff6d1e9018ea36d6c31b858d1a8a5761d696e8e0a53bbbf2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7V2589869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b2a17a844fc9c92f126a74536a55ac4d15756eea48660964264608f54e435. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7V2589870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c25fa36321b23fdd025a0b74afdf59ee5fb0817c9e5e511e7d1d2f10e38171. 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/QZZ7V2589871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a2b4358122a6feb26489a8a8adbaa0a9dc4ed3b1a3d84f6fda8a32c755ac1c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7V2589872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2ea7d2abe35737985e84ac161cb3940e8958bd727a75fcc31fa17e697fce9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7V2589873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019c32febb8d1d7b290a07aadb2460873f699a61c1059b6097578ef219921dd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7V2589874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643d4ca24f408fed8a661ec37acb7d92af2272bdd6ec8235c0408400b3ce8a5b. 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/QZZ7V2589875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cea709cb6203b85b9a030a26c8c22324bb2dd472d6d883f706b73673c2b0907. 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/QZZ7V2589876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b25d2c0e4a25a88e02efac4a6c2a15ff7d29c10831c5f606ced2d827ca75d68. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7V2589877.