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 0xbfce062d863f0e5b9fb92a4465676871c90428da137e78191b8448d3b7110881. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77d17dce-6eb3-45d5-851e-3105f7ac6faf.json and https://artists.proofprofile.net/proofs/artist/77d17dce-6eb3-45d5-851e-3105f7ac6faf.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 0x96418cc970f40c60b466ca56cd082fca7dcc644f66e7bddc6c201a81ed9a7e19. 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/FR10S2110085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b464292bf90d77004c4c5bfe786ae233557da66d355ad8a51b99afadd7b4fe. 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/FR10S2110086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c27717499455d9f9cc5b05e258e4ede7a96642f6c358769b5270d2ddcfd96f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S2110087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b1c03bcc5761abf99f08ba91ed35c4db1a1708359c317bc945fd4a1567d9b. 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/FR10S2110089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe911fd436e1b899654c04a35e5addfb3850dc9c2aa5ee4360bca1bca1f59d21a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR10S2110090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee439ad83881c92a2ce746ffb7ae9f789ad00039b3f23190b511697778c4d5fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA062010599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e6b3c58ec024fdce619f0aac5d847235f7352fafaaf8601db34767b551e3d3. 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/DGA052064968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30d1e51cafae9d48fc84743ea4ad5c24f3314257643e9f1ac7dfaa261074baa. 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/QM4TW2375706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d86e82f28b25342cf234294e585c71061b74c56d24653bba1683ea5f9b33e97. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2375707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723f392e3062f91edeb39e919116a1d0d5af5bd0f573e3594e874627c31332c3. 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/QM4TW2375709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c61aca37c0cf4de38a80f08342dc1ddeb5470f23432775faf936a3c25a2ffba. 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/QM4TW2375710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a6880df7da09a6e8e7417c369dcaf1d8db8dc50269a5f813f17db1337801dd. 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/QM4TW2375711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006edc3ce493b9384392730c6381bd80dca990c11a39bdae27f98a2af3d3bda1. 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/QM4TW2375714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d28b88d978bca81448480c820dd575cd7b60fbad12210456aa951b7a5574788. 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/QM4TW2375715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb02069fb5b998b4c511bf5098b171040cbfd819705dde229eeb4278dd1fcb4. 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/QM4TW2375719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eb36edd8896800871bc5fd37d7b5ea6281f96466957b97e120de75d5830e59. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW2375720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe304fe7fc76b30cb9bd873da199a0f6092a29d11259e73e92008514ebd006d63. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZK6Q2216818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8db1099a9ffed27ae40884bd5aa920fd4c405155f54db8af1c32ec0022444da. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6Q2216819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb83757c612665c58b4b658cd51bc88d9302a13d1daf86f2aac39695a8f3e3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMDA62230829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a35dd2f8135691a4bb67a2bfa3609da67d6f857670441d12fca9b84325839d. 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/QMDA62230830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2dc48f584466fcc02b619f12c396f6ceaef1e2ef0b9fe04e072ed4ef5e804. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMDA62231003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd42306367dfb92c07308f4ccbae62db99401a86bf103f38b984e917516e1969. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA62231004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dd3a88635fc05eb1f8a179f0775378e75a8c42123b7691bbdeaf61a2baf841. 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/QM4TW2364059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60052defd78a138d482d3712d23eaa63eb5aae706cfcffbcb286d1aeab9d0697. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW2364112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe75fa74c3827f54ee23a56036ad7a9135f82c4187d10e28fd2e89c2938ceeef. 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/QM4TW2364289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ce161be40e6b94b2af914eec5515b1d07c551650a896762728d10382c1dcc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2364359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcb77f50aab8d4b73b02b020fba609c98fe1cd3fa4a3228c70f19247e8667c6. 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/QZHZ32286485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f7fda24e91a0b2651c431621eca6791755c175969e05a0fbcb877d3835f562. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZW9N2217748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557b0c29500a5e3de06cb46834ea391ce8c1a92cdb57f330a01a5fdb87502a16. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6J2051428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e6a3d3a89dfecbec8a2696fb7f4a315d70bcde7002c57e0bb9ff4670e80b3. 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/QZK6J2051431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2529ed44db8c521f91922bb466f2129bd150fcaee443bbb19fc36d0b03f8c4. 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/QZK6N2158467.