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 0x69d230b7f6a1982507fad963e63ccd8d1760388dccfce4c1dff01ff5e3c32973. 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/56424630-4f14-4ee3-a53a-a57257b7b15c.json and https://artists.proofprofile.net/proofs/artist/56424630-4f14-4ee3-a53a-a57257b7b15c.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 0x885aa2f10cb73be2c78a8863ced902c64066c9b3dc291ffbc3bd5212d8ca4ef6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU4769231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945d1ba260489815df19b1c41f93cb250058c9240d3aa91f5567a1f9bc662f34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSMU4666654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d990a4477e46b33fdb852f4b7a07b7f44eb7d3d207354546bfb8fd5e095e19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU4666870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d64dbfe07e321accd296b7bf83008054d6224b360f726f0610ab6d71ce209f7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:17Z), 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/GBSMU4662618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8189a64d558998a5092278ea4d9ee3be87707f21a83c7db29a4bb4be6ae722fa. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/GBSMU4662619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2320b7d46e3fad448d95e2c6e00564f6013f1e801a427ad61e407e13e274dc1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6P42352046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63353ef60d7cbf7e9989ab08465b2f73b69beb3046b850b619fc931ea98aa07. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBSMU4662921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d57b6e96be7b3adf307024d1db7bcc8976b6305cf196a3cc6326ebafd78aa. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:37:29Z), 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/GBSMU4688563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3707612970dd77fff20d3ad058bb8bc5bb136bbb9729b3f51eeb2cba1e9e2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBSMU4688997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b2cfb2da7ec1320a3bcad815ba17fc1294e886775984ca5ea7c41fb46f0fa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBSMU5075424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe4eca6811617126be43899b7ca3ee60fa8f90dbc49417c94eac2a596cfe9b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:02Z), 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/GBSMU5075425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542fac97d0acdb3e2f627e4185fe9ff8863fa6fcf60d09e7d45501666415b2c6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:13Z), 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/GBSMU5075428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa373c96833b6c7b25b8692b8aafd3a59816e60ef18d7068f923a4493f8054c73. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMFMF2221994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205156c270373a29140b157568d2c23b10e460bd03d893f084370e4ad294753f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USDY41983673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c17671a0dda76e5fd96c14d065e2f053e1ef0e7c3d3021933d8b827c524125. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:42Z), 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/QM6MZ2156641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7763d6da06a15d634425500b4ef6e352b5897cc744b3b84af485b0247fc29. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6N22156515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720c8a27417f126d78f9ef1e86764911b5dc4774ad6ad5487c5b8791a69ec7b1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:13:39Z), 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/QM6N22156519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d782df00bf402bca78922acc82f6024887ed296e62c6ad5226f03616c97b32. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6N22156529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251409c8a86d7ce0a6b99a9746697caa40f094bcf4ac0c1d888b11de3c4e045. 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/QM6N22451770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e93a17be8fd203115f26af3b10e6fe4129890506da88e31ef756d456fa71d9. 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/QM6N22451771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaf0bfba208508e7d68ad09d698ca0fea33b3d5367d28ddd21e0cac9997f196. 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/QM6N22451772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788c00051a92172f8b7ab572376a2ea09d810878e3d38bd5e822901f64a8be7. 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/QM6N22451774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4177c12862ca5f7e1b7d59a5b04f6493048bb749082bf9ac0e9ceed6b2bb5290. 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/QM6N22451775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7763583ab2baf1c5ec4e4291a951f8bfc757a3f808aad3fb73662c487aaa1c. 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/QM6N22451776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3f96a610de1366a74b06403ab7150e104883e56026e593408201569983ba4c. 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/QM6N22451777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dcc72f92724f8fd8d30d274403178f7cd5c649cb6f3bd6fc86c9edc26092a9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM6N22451778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fc2719edeb18c47a25c0e3d44dc70717fb5251f4c30ee092e871dc838c9736. 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/QM6N22451773.
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