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 0xb86923b67bbff279065a24811b220f91ead23f074f04d8158f0d6f900dde4797. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/641fa20e-97b9-4136-a5e5-10cdfaacddd3.json and https://artists.proofprofile.net/proofs/artist/641fa20e-97b9-4136-a5e5-10cdfaacddd3.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 0x8412fd323da00a5396021502224851f9e4228267d3c847c213b6e81650a2925d. 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/BX8H82200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16a0487e74bad890ad063a1a91f6a91ad60dc5d8dec435e67b54179d2d42af. 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/BXX522300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4728cf5eb6e6e775d6127dcc5d2110e9cd6b40f10af239a41cbe1f8f54efbb9. 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/QZHZ52149572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56330cddf762ba0cca76387305711530577051322367225c1e1b20cf392430b. 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/QZHZ31997168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a00d0299c4330bfab43b2bd86e46e0dcad384c066f1db1a37cbe598bdd6ba0. 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/QZYFZ2445787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e109ea2a41007f41fa587c98368570145d27fb600691ebb95d0907f4c614d3. 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/BXD1K1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3547bda44a6627165ab32592b6722693d39a66071d26d221c1f8c4dd29fa9d8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BXD1K1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43646f6caf07b9aef25b8f7415a333f8fb1d358d04de38a70f17133aa1a23099. 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/BXD1K1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f829364e1672c87b8b851b5cc2004fcf5b4f0fa185efcdff8925d6ed9fa7b91. 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/BXD1K1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edaa07a84820dbca046c9d80ac8e1f33f677d41b4ae6025b085e9d56fd60e4. 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/BXD1K1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e8846436e5bbc23d8845dfdb6de2811dbee2c32231526e78e7b444b7d174a. 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/QZHZ52073923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9e98f84d6c9ccaac277c9634de200bde616fba11a6ae980efd91cfe61ff16. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXD1K2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a04f7e7cb1d0cc5d9f49b0fb8e53c5bf7383825f34695600a8b285db270c2. 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/BXD1K2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165d52bfa8ff9d9a40fd96fa9de925334c9799cc1428cc3533d45b45559e9e6. 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/BXD1K2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044473794fbe6d372e39a445c2d410922f209ea973e28fcaced70ad24f64ed39. 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/BXD1K2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368415e61ee3938ea54ee606ab0761a852dd220f6e0917500ba1d99afeb300c. 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/BXD1K2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194defa4c50eabd6ff78fd17143a66baafb0bdf8a28e22ff362bd658366eaf43. 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/BXD1K2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90a6ff2de5ba240cae007b4278e4c74bdeb3d5e01cdc09564085358ace1fe8b. 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/BXD1K2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a850939a5b7c3f7bfaece0e599a88caf17d2d9f076acdbd803184f14cc272f. 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/BXD1K2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c509c9abf7e23fa574b1a95e7bc8e8597426ad9d6f91e50e437fee8286e6bd2. 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/BXD1K2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39375388b42c8c949dfed72e78aebc5b12b388c3c1e1bfeb3f015105ef110ff7. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXD1K2000015.
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 0x7e0515bc5a407af2f497f66536d3b5f616b929cf0b65f404dd23e372cb0eb5cc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BXD1K1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581c1dd4c3adf3b0be4192978741287a151019bc73e277b1fc83720da8776d8. 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/QZHZ42185299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7e1474311ee9256d8422a3e274ecc89fc9cd1d98d76239a0c1232a875bf4b. 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/QZGLS2579640.