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 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 0x40fd3016dd9ebdde456f6b7cf92e02aee2ce15bdd80aa03d93a06a7badc6a773. 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/b6a919f5-207a-4e97-9ab5-3e5f9b5e80be.json and https://artists.proofprofile.net/proofs/artist/b6a919f5-207a-4e97-9ab5-3e5f9b5e80be.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 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 0x11e60fd764e4616332a7c786889cf75b7ce3c926e1ac738f28a92760f0cdb331. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732147573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb048d64d134089fc24f33ee899795b552ab640332dbf53f43078fd28d00ec25a. 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/DGA062377630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa993e7a55316ba0eeedef7511f534a29899e0ab43cf5fbe448618df381f1c6ed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNZ852307616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cfbc5dd599fd7c2371478a38cc00910abae65aa7f1cfc206628752d166d134. 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/CNZ852307610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b417e23bacbc550fa2eb9a396406f2116b0a6f537dc2323faac96208d27515d. 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/CNZ852307596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e100130ca2f440dd16e8fb542869531c4ede5a376f6172980d04e0fc2153a94. 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/CNZ852307597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e6091b3e624f236584b50ffc279de3a175261eb4b3b2c7c2bb7ebe3c69389. 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/CNZ852307617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8005927f7f976d616d7dc044d75be88fca602f83a0b06553be6004e06f6323af. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CNZ852307563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3730ba7df2a59b0b67537dfefff3a68f48232398701a62849870f64a5082c73. 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/CNZ852307564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2a1c261268ef1423b254f837721cdbd4f873140bf94bd23a060aa73db48d3f. 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/CNZ852307619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcb90f4b2c92facb03bdac7beba10fd0403cabe9d730e8c9e1d859367595c7c. 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/CNZ852307620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623c4e398a711f64582368cbd44d58a8881b414f04bb3158750a5137e978f7e. 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/CNZ852309185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec1fd513b76c097774fd4e0fc58b300443d30396af808a73537007a2dce71da. 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/CNZ852309186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bce417e5037fd46e69de22d336c792e40e01f02c6a410bd6b25fa53b9f6f3. 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/CNZ852309232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217866df0fe5053a2ead73659d8f66f91ced382088070a10c713fd40afbbd16. 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/CNZ852309189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd2eaaf47bf7caed2a3438dfa836636ed3fff27bee9d2478a1bdea0b3b9f04. 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/CNZ852309191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496abd285856218f6ae9784ca7a4bfcab130eb3b4e9e89b25592ca78c8a374f4. 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/CNZ852309192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd142945a5cf91cb089c5b425fdcc4fd0f403a345d5b4d31150898b58485a2c95. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNZ852308440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2363e769a78cfbc1ba1d811708cf016b6c5e883449cf21002de9f44888666cce. 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/CNZ852308397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ece6cfaec3f077ec5b2004d191b3d480ae0e47cbd420542b42f0b2dd96682. 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/CNZ852308398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a481db59c2ec8b8f56d05d5369c1c90c556ef57a2488b8325484d9e2b12dd. 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/CNZ852308399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de06ce6389a44ea4e1f3cb48abd08f930db126f2e84c6d52d6c488d35040af. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNZ852308339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7e9afeba9930a7e107dfe5abe8ca5f06d4546f5ff85cb938d8e44117d6333. 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/CNZ852308454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136491482507c3c8730ef11c9a6cb354b07bc4a44f90d7544231ff44b3d4c5a0. 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/CNZ852308412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf707f579547299eabdccf677b132ec1509d690886c74e3235a6eacb3f3e67392. 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/CNZ852308455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5152310486659cc0ca0c118865d9fe18a99650ee62479e65211ea1b6b62fb9c. 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/CNZ852308413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd704be89fad5b9156794d27964945793309f10f0319998765d6e063b50760ee0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852309193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae8144b1ad51dde4a5e81ba4b69e5a1528de8990668f7fb70c7a9eb5b6687b1. 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/CNZ852309233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed4e25852ea325bf8d441aefffa87541359b62fd983f796697c240ff5ea22da. 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/FRX872135589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfed8941126000d5390e058137e2e216fa3cfdd1aecef8b3a1b268a6ce37bbf. 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/FRX872135593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb19173f3f0512ebc3c31f4b3191167a18983126fda0124859a5be11adc0bf0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:53Z), 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/HKG732308208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6141f9e5b1def768deb6339ae6f75f275234a37002e08eee2843babd458e70. 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/HKG732308214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850d220378e44eb95f3f7bfae6be3381e141c03ea9cb999178be10e0fae8ec1b. 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/HKG732308217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ad96e30d6b2ab350a7cd3587fa70745b4b26253c2f8f912520908d20cf947. 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/HKG732462780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af97ef43544fb27c3826c160f1564da8c587bcb44387ad435a7d1c3f6a67753. 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/HKG732406670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd47d87726f3504491cdef0619239ed1b68d71ec567a877f4ea5008f2ba9f2. 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/HKG732464941.