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 0x243847e942806e2a8833d2f8c4bba94b099655f1e22e1f280ca375c94f794248. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d90c77e7-89ad-4bb1-8055-b68eb76e0554.json and https://artists.proofprofile.net/proofs/artist/d90c77e7-89ad-4bb1-8055-b68eb76e0554.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 0x6aea1583e5cca5bb8d31e18015f283933487a5746f6db20e5242806b17da5636. 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/USA371035635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b14a1aad76e6650ac25bfd1c07e1860b26167c6dee6cb9dd0c96967a6ffe3e. 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/USA371035637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf975ecabe44e0387df23ed756f2fda35565306933190ec0546a6821e398b1a0d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA371035641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382209d0564f2cc30983e07c407e29c056b882e84fb04ca247ed3a4469ef85a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA371035642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab338b53be506a4086ab2d37e8d129a45716139e6a4f472851f221b1a520a5c0. 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/USA371035643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0db5c03efc138af57112009e8d714f7d5b044811d5d6025511b04c655da8afb. 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/USA371035644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7728f799c660de473c6144b43414f817ef5ecc974d95a9095f9319ca9616d34d. 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/USA371035636.
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 0x05374683de8372b7f3f5a529aabb0e56c5371aab3f8101d7dafd0f520a4a41e2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA371035638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25d6b3216d61836e30d1239f7b1f5308a409d546703dc7c37b97582f8d4cde7. 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/USA371035639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3217ac612fdc5711e178fb6582bd8ce42aae81f5ff216df4b686ad91dcc37f7f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA371035640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810c1f4e885b3f65a923fc88d134ad08e60e60563b95ede666d8021aaa6ff5a9. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA371035645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1309441ac60bad6aac48dfa1a43028516e222461c73f962d00516e52dc432d04. 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/USA371035713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43cfe5f3e3534f7f0b066387f3d3621ef2f33bbb08e09aba58d80047eb74e35. 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/USA371035714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f717f6a81f65f9124b1ca6de7b155fcde39f30f8ba0899722e3ef116058848. 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/USA371035715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c105fbd88b3222fe27904588edb49de71accdfa0b4e3774eebe4d64e07c1ca7. 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/USA371035716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd0920454665c6523a959f9f66490df0a9c6ab9709e5867463ebb657aa1f9fb. 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/USA371035717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a8e2bb4fec92367f99e5e5c1c9710b9d2a94151399f14d17f8471e156f5313. 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/USA371035718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1106e98c0383e6019c08bedd512834fd3e71dc0870de1741bd8f30157b5460d. 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/USA371035719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9371e247814bc52708ebe6ecaa518e40a7705c01d1ff928f94b1bddfeec921cb. 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/USA371035721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fff5b11a4564e1844c6e4f47daedd067027096d7b53ba4da52f597a51f08065. 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/USA371035722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a71c031d450360a9d53286506ba5f539b380615d694d8a21814b900947e35a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA371035720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c59b5988a9b41a2c2c5edef1ba8e8bd4cacc2941ae1c8e3db18cd752b8cc85. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USA371035723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75425dc10c3fec463bf9cd1d6f6fcf8dab1fed112b82cced9e6691124a9c86b7. 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/QM6N22473024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ce2de75d44478b5534d516023879ca372036f11d526c7655006d7852fdad4. 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/QM6N22473026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc607c96a7505748468031d5af0eb0cbff961576ae661871661a0b73a10e5e. 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/QM6N22473020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531929f39668b2a0d4c93915bf46e02250e1c0e62af593752390bdf4c86c5cd3. 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/QM6N22473023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475a4c5b7eebf59dd0328fa4cca466a84b4b66a69940093a77c1be93b24e2e9. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QM6N22473021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1f4a8c5ef750fe9b9a18aad607819b37392b27bf2c200f9e3d17e45a4d331. 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/QM6N22473025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea670662030fae738e575ba7daaa8ac088780205cf6d5f8fa261a7591bd5e1f. 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/QM6N22473019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716a550ce94487993788e4fb4c3eefd6bf087afd3c2bce7d65a370bbfa898d6b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QM6N22473027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94591523d2d6b664a9d9bfefb69f46e6a71951913a91eed008c89102e80d67dc. 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/QM6N22473018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa27f6dd4c48ea8b74b499c8ddeda392dc6886af17576f06f2e55d401906bf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6N22473022.