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 0xdaabfb56405cdc5231eabd73524f0b3aef71f93e228d8ad0fa3f009fcfc0e089. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d1c53f2-f20b-4250-aed1-3fde747ea70e.json and https://artists.proofprofile.net/proofs/artist/4d1c53f2-f20b-4250-aed1-3fde747ea70e.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 0x59951f46b5ae86ce19ad21b42c5b50c777cdb5c98340a28b52371ddb938102f0. 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/QZDA62045762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b5fa21cacd9ec263481856ae9abbd67b2aa5d35be364d8534b4761bc54544. 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/QZFZ62062855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4872d173ebcfc41219ce38cecc39b1197e43b0004a75856f1eb262a53977a60. 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/QZFYX2050810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8292f9e19f13b3f35e492369dce469e2831bb644fd6f7d7c3b9f95f97207e5. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZFZ71995245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e6b855466265308aaff77755fc9fd8e70b6e280035ddfa44d482799958f39a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYX1954245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae32698005593ba874813f994ed96f0ddebf4617ae5e33924635b92666b8dd. 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/QZDA41937000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2369b35542fa988d67f601beae4f729b9044057881d4c8b85c4fba2db689af. 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/QZ4JJ1857118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2655404ce152254c026ecc6985022b8a3c931fc5adfb5eb68a813f89379ccde. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ4JJ1993269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2b201470613507eb0f3998ab159542d53c0dabc9e85987cf3cd9560dbdf8ca. 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/QZDA51929187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f38eaae4075d88375933be9cc29bd6e0b42f5aea6438a2276412d145c949292. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA41947406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9558cd1b0c459d528e83b5e023ae7f8c354f56d53c41e19529aa535998cf5a. 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/QZDA41947407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd26690634180dc0e3694197b585c9afef70bd15d234cfcd4014750408ffa4. 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/QZDA41947408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59342c0248b201ba3c2fdad2a751fb27e045395168ef28b4f1b0c89afae9fcaf. 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/QZDA71928841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666cd3f7bd443b498701e5705d667d9c7f9aa90fef1100f767b5aa02d5a257c0. 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/QZNWX2053093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f99c7d2139dea75ff9e066d80dfe441c1a8a27fde909fe9dc774f071ccf042. 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/QZNWX2053094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f8e648df8f0676d67ecde9ea00e0041045fe18a2c84f9f4d841d56c9529b77. 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/QZNWX2053095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3747a447d2e932a061e2ec4cd0a916ee5d5d5fde0d84d499fafcdff6221e465. 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/QZHN41926108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45afcbd1797a6c325efe8f6724891862a2d5093e1597e8aecba49ee60c3b885. 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/QZHN41926109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7483f6b1bfb4675e37937af57c83466e3e074d87d82f4e71e77d7d84b45e889a. 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/QZHN41926110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d75b783349be74c95285a58c8373b8c1f57c248654aedf79ad78f86b362bdf. 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/QZHN42028764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad7216253103937752bf515c44eb93cd0ba68f5573e74a853a0db232853e2dd. 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/QZK6Q1966465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccee3368d1a4acdbb6981f9dc8c75bbd45e5dfce709ac4e61b0a24090368260f. 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/QZHNB1994428.