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 0xf2accc7521372927caf804c07fd42fe758819a93c5fcd1a05a318f01e6ced4d7. 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/626bc6cd-8abb-42de-a3c5-f3d6f024355a.json and https://artists.proofprofile.net/proofs/artist/626bc6cd-8abb-42de-a3c5-f3d6f024355a.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 0x54abdbb852e4c96306fb57bbd0e4dccd3b687d20fca90897a90e84ae952815f5. 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/QZNWR2022292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd71c34afc283a2b8f5483105e6d0f22d637c7a0284697d4405a9fc30bb651. 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/QZFYX2010347.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9276068e599098fcfce1bf837c6dc0b8738b6097f485906eed7951c47d9717c3. 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/QZDA81949233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c1e8f36024eeb80cb628ec143ffede7eaf65f06601cbb7c557fdd90817fbed. 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/QZDA81949237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a27f15aeae19f7a97ebd8293145506ce3c69c42715d7b10d3e424f06ec05c14. 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/QZDA81949236.
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 0x3a4b7ac064e8b64de5fdf8124ab7a582b6c9d6b0c0247f105d8408bd36ee0404. 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/QZDA71999440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec9de7a221c2ebaeea021971df133971544dc4431c54bca9953d2221dcd083. 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/FR2X42121665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08125823e012f1b000fc21e34234604644425c4a534c50fc523eed53bdba1e00. 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/FR2X42121606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c723b8b725566859509042219550b904e9e34c2d4fa52fd6b0af994d0fc234. 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/GX53U2097091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80190925270dc66598dafe47186728e6d330be72d13b5d7e0496f73328d18a. 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/FR96X2128760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe574d89822767f73f252e5ed8b36986430227ca928c3d48f24954c9c4e8b6d. 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/FR96X2128722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012beb0e727c5f40b6ed44887d55c1d12fb292c4d1b60079fee8d25584d0e99. 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/FRX202152745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784571d3b1f5fed90288be1edc7c675336b5bfb4fbb3952ada4ef4f81b8fa3d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX282177594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30322e62babe4d2f0c99cc03527aa5822fe9015cdc9659b0739a3017125236ba. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/FR59R2133296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0706365ea893e397c876af984ced73968b9c656e79ae2cc53c09701eb991f. 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/QZDA81980305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745577ccde6d868ebfea84790168543be4bfe0f1448b2043165c30607dacffd. 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/QZDA81980306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe353545d9b3afa86bb90c033fa64e49c8e747b06e3ce52db4a62225a75ab2d4b. 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/QZDA81980308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aeda44f5f78cf4785169badead647851a6be6090f1eaafcb810160bc49e3b1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA81980310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3036a4ea18a4542eecad690c10d053b97bb00ee209065ebcb039bcfb1adbe92e. 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/QZDA81980312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f793a28e89aeb724a48473d22ccbc43590dfc0225caa22449fec1cd48febcc. 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/QZDA81980314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd737fffb067edebf1a8231c205e317c179401622ee4fc5d04fdfba871203d0a4. 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/QZDA81980315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4cd54dcac5246da9a1e070dc72b57c952731e47f9b0ba1425c1f60ac72e0d9. 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/QZHN41982858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e5ec54efd212197e57e3bea5702c7140da39220e685e44fb76d61e66c7a3e5. 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/QZHN41982861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d99ab1759dec95c3fe8ed63fcf48b3c0b233b41825bdc50e07c08ffe8965a5. 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/QZHN41982865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62ca15163752fad9590e2c5a5dc400f26a9eebdc03c18f9294070ee5a2c2ca. 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/QZHN41982866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97a240d66411d8f11f6c5f62c8297a2339c7116559e73ed2b8b75ca8085ca92. 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/QZHN41982867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16785b9eaf6da27bcb237d5c1ee0eb18028f08091af33e0c8059d3d2dacacbaf. 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/QZHN41982869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280754204fc3ff58365445cd2305861df135d1bff4441b249f50f4aa7e1d4fcc. 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/QZHN41982859.
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