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 0xf409f2b4b9997af05a3e3de79c7c23f8dca0aad58d1dc2362ad11d54bf35b4f3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70773785-ffc6-4610-aa13-72a1cd878de3.json and https://artists.proofprofile.net/proofs/artist/70773785-ffc6-4610-aa13-72a1cd878de3.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 0x138ae01215ed1d7d2e0a7712f847f523ea34ed7c82acf6e78b91b0fc904afcd1. 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/GBLPF0260355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6843f15f842295b28cb1b09f77858b1110479d96fb7cd43baa4b34e423b049c. 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/GBLPF0260358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07436720d69c957b9d50616a226c02fd3ef6b319e2cf10e9a2e2504f57664eff. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLPF0260353.
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 0x878642ff234a40cc536230857d8cdd9e3a60cb5eeec991f0024ce09810b05042. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6777337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb441928d305e0a654a8313f57bf96e123e2bc665e9da18f0e3b7ea2f2ad058. 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/GBLPF6777338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaef8e03fb039301ac0b3ff8e883c67163f1f9e9f33e6775557a1965124a64f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLPF6777339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ecd14655a76dcb4a24a0c0581748d94aef7a2a6ac12e4b418707f7827c2c60. 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/GBLPF6777340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5723b8295086d6f49f4f89c844ffd28b8eb11a315ea8f39c70292ed0affe022. 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/GBLPF6777341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db89b16c3e21bb730aa3b69841fa5e3b0b6642b9fe18716bd44304b5040f360. 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/GBLPF6777342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfedeb1e68e60fbd61f6ece93504df30fb68fe22ab0776b4e86e6662067d3e7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6777343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afca2b160e4fcbc72953900adc864556fc3720d1220b47c85e771fab447859f. 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/GBLPF6777344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5ef39aace4c555ecd646aff74caf11e246752bc92d8910a2d0c30f4ee49485. 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/GBLPF6777346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104a464ef5bbfeb50799ad80dc1828432e0a3697bbca2225660e765f6583febd. 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/GBLPF6777349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbb9935ab65aa7955171f41b19eba426d5d0b3957ec2d3110d2f24c92284939. 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/GBLPF6777345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa411c43184a74adda2629ea3755b239205b503a2e648a550adc7e14120314d35. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLPF6777347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ee986942ac65e33a3e33790cde54b3e88fc70d7b27cf99bdecb1bef6f6efe9. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GBLPF6777348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb795eb6def0c1d8785a28ebea65244e8236e52e9da1866e9200d764fce4c8c2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6704502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c55a06475920e06eeb819b4ccda0757475ac44eb2bd9a5434184b21fa7bb4. 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/GBLPF6704506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9b986c658aee4d8d97691a8548bb506d4127a9c52474fd08392004fbc1a7e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6704507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc93d23586604a8baba7e967434f6705f49a17e64a8a4a30983606e22da17e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLPF6704509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f095f465933f155ca05bc304dc7764a934718aaebe7671a2e410f5fec94161. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLPF6704503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b2eb7f35d715be1f930e82f9986dd4cc0a6bd6a5f45bb258cff3d1a6e8a68. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLPF6704504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93299e4dc9e8a9cdd0dc24f6ad012f7c1902ad06dd88678e34c05369f699874f. 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/GBLPF6704505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab39ff868f559cd1087bb01cf35d242037f76584985f8214e2c5f9aed475c34. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLPF6704508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49290c428717690616d7e726d6bd2c77af4685d6b4ad12ed3722a0b1a23d5894. 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/QZES61995969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd9b77a598c6c98c37493492aff7d9ca9771a8f6a0680a9a994d34795c01bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLPF6793820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d36f1c5629c7236f615bd11b7821703e0888508d56157b8435dde5cdf7fdbd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLPF6793695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8d81a32b0710e29e6838546790121f5c6a306dd2d6fd847491242caa9b40b1. 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/GBLPF6787327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c034e7957a89838ec2ac0ed421fb5d4e0ae0c49fb1519f0f41505287fbd4ab. 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/GBLPF6764550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd169e1c7d944986ee7dd01df4f5c0c7b2ba21a1b4ff6e37f4be2267ef3c33c2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6781260.