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 0xb24428309ca39ce2f639e0640f84f96a5cde8d2168f7fc38e1e2a51c6dcb7e7b. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d11bc5c-f1fa-4b67-861c-00123c3ffd6f.json and https://artists.proofprofile.net/proofs/artist/1d11bc5c-f1fa-4b67-861c-00123c3ffd6f.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 0x70c646923ee1f072c73ea6356410be7d79b377109a3bdc24f60ee28ba79befda. 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/QZMEN2399262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3039d82ecf77033a8ac121624952dee7c3fc68c26b3ac33b805da47d91f5b8ef. 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/QZMEN2399264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c62952d4d4c56171d6e0568167de5b25336d5bbc97982663b9e363a25100de. 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/QZMEN2399267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526fa53d8244a95cd70640d2958c3fc0fa3b0e81739649e5e056db4f8755e0b. 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/QZMEN2399270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266bc538601ba2a513f2aa9b73f1ff7463ac1c38478119fe193ba84f837080f7. 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/QZMEN2399271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db7254ed68b2db9132112ec60435cc7027095ce813149b07cbc3d76185d110. 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/QZMEN2399272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33737e07d777797e32750677fdf470226227f80608652dbaedf840200eb5e02e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:17Z), 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/QZMEN2399265.
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 0xb9bcab1136a452a258775a59e93037ddcef7658325606424672ec1be9fd5d58a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMEN2399263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f963b5cb06271df182e0a953e71dabfcf4e3e63b1553ed63a32ca22d44bc02. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEN2399266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde401aab9356aa82dc8b50512d29ede9af6c50ed4f8559fdc56d8b32386a6672. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZMEN2399268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b1d5932cf3954da9f7921f6212a68ca748fbf23352fdded719be97ee4fbe9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZMEN2399269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609dc18c4e29adb2f142b086073cc0239074d860b6565347b58ceb0727a0faf. 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/QZMEN2399273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3476c4f87746574f4d4b52ffc4199676ad33bbb9dffdd217d6d3d666ce0de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEN2357380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814cce69a0faee9a4c3e0a327e2cd5eaa8a153b83a348afbe2d42d97485cc91. 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/QZMEN2357381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283cec95d4e0d99a8aba11b91af319a504c62ecef706ca2a9d800d501979d902. 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/QZMEN2357382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195d7a3e994a193c666b7849bacc8bc443b8863200b0eca13f0387842a351e1. 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/QZMEN2357383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f8f2b73fe44ceeb3ec80b68c32f23bfcc0e76764d6084fbccf646f0e37cadd. 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/QZMEN2357386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde105c1374d056751a6af6becfbdee5dbc09579429e15d3ea358923d8c88feb. 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/QZMEN2357388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dced250122f5858bfcfe7455f26c4726bdc6c553b38207afb4f52a604c03ede. 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/QZMEN2357389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08719ee7f9fa2871723292418bd8294e0596961051062e821662721584417588. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMEN2357384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312dfb6ba0e18bfb624617ffbd8e68c533dd5283447a375abafffac54787d977. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMEN2357385.