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 0xce9f9c26c707e997e936429c7f60833b5cb551fffa2e0b8b11bbd8d81599b884. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/052db35b-3bd0-4add-abd8-cd4f34e00f97.json and https://artists.proofprofile.net/proofs/artist/052db35b-3bd0-4add-abd8-cd4f34e00f97.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 0x843f23683b393d5bbece5a14e2aa61c8ae61986f40df6d826fc2d04416551b15. 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/QZWE92206738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8946cffefb265ff2177f834781f9d2a1295fa6939a2691dad1b5650e70fdc9ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZWE92206710.
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 0x23b4fc27c14279904d7952f5514a9f38ceb03271cb2f56ebe4c60db73386f54f. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QZWE92206753.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15db8836930d07486621b1e84db2c3b878d4f8db02223d6a31871b904c073f51. 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/DE1JN2482980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01279c81e2932e565944bd0ae74b093576af6ae0287ce408dbcd8a0dd2f0ba6. 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/DE1JN2482999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5994d12fcceca994d504eccbf93127512cd6356e7a92be074593fcacfa18842. 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/DE1JN2483167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23e0157e7fb7e3cc2e8fa268bfdd6aa9105aa1d8bc488f1c4cb9061f07d3d24. 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/DE1JN2483153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb1f8044bae0cefcc6cab2e0e089c367832a41f001114db1fbffd377216c898. 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/DE1JN2483358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ad84342121171e7e5de473792a8a57e609a7a6468b3de4f186a43a4b537f13. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DE1JN2482914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d662a9aaf2d3ff96f9bcfe96b9530441fd937075a226e7c8233dc18a241fb6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DE1JN2482918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cda7265cf077516c075d4fe1258f164ff9298e75dc133e19a1e524b68b9084. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DE1JN2483011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451e50463c8035ce11c230fa2afaa4221077b40be123aec9bcd2fc4ec3bff2a. 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/DE1JN2483173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe827537be8124ee2d3f0b6eaf7a2a6fbed6a141b3098692a90e21b08f6323. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DE1JN2482965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287c3ea1820f9ccf839b13227814ec82ea0723f37af2efd1a582621e8a5960ad. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DE1JN2483031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c483e2df52191f06a252379608a4f988972e4624e47ffc7ce992c0e4ecd7629. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DE1JN2483147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8aad40772fd6be0bdc2a124a16d10b9f7b097d46c202de713ee798b3bd687bc. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DE1JN2483139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499aa1e2fd2519097066cd3f626474ab5670a0ce40e6eb6323090ac8dd7e447e. 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/DE1JN2483010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe832d10bdc5a02679ff96e99f601f87b14758f2cd45d1453e9b0b13da04c02ee. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DE1JN2483051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d8f7f77c433d8f1a10a089ff963199ffd574805ee18e685b1ad06135c5f2b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DE1JN2483020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faf23fb2c15e3bf4c1492d00c7d4bbd61598f577d6d5b64004366f369877816. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DE1JN2482975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9615030dcf748551cf8e9f44adafa671070f709898d38faf756607a9e26f0f2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DE1JN2483538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd03afb5d555dfdce2f32b96d416b3cf3cfbeceb9ab946b6417175486b6a56ed. 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/QZWDW2431684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b23f1844faa6fd9eaff1e378fd76244fd6914b0e09c1bdd2f957d47973d24d2. 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/QZWDW2431686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943868fba5a558c0cadce52250ffe145e4e64bf92167267d0db147a270dc3879. 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/QZWDW2431691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc66330cf5381d3d3441430eec5ce4648aba4159e8cbb1b4833bb4c40ce302b. 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/QZWDW2431695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5befc221b3318b86f26b104ba0b1cd96309c4a98ced66fd4e0bedd699a68e94. 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/QZWDW2431696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b47a78a88f51e9094888c971cd52da57e548293e2ecf1514258971f072d1a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZWDW2431685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a8f9c0af96f9ea52f7c21fd62c623f4088027b73873e85b6c4459a17baee01. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWDW2431687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03c1a5411d5357cae25ef6e5d330444098ce660d6c9590227e0ec1270e8076e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWDW2431688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31280e611e9d2d3754af0b58050462fe0c0cdd47f5b73aa0962c2f39863090. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWDW2431689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558b8f5d191b8f39c4e92431d1e54c4b29f7764a5a8297f9b39964b18aadabb. 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/QZWDW2431690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a252ee24ec877c21650c8a89fe7f5b92e3e581a5068bcfd523d77f9a55a48c0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZWDW2431692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d70203e6bdb468173cf1c026b0b67fb83295f8001ab941a9a197708893729a. 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/QZWDW2431693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf2fd2cfdf56c7628a763301ad9f23ecd1c86456c77222a8abf54a26de9af82. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZWDW2431694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8798c6eb5cdb1bdd70ac797ece91b1bd65c9f0459e665aa75103210c72ad229c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZWDW2431700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59371b897965001667da99853903adb9b4978d7d4eb3f9c64d71b74d19dd3d56. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWDW2431703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a236cd9f5660a75ad300b789f5bdfb21456bf9378bd76a5d268f9f07911802. 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/QZWDW2431707.
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