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 0x74140c67d85aea9ac07973fd5b4b293ac1283bdce4daa7d0f6831c82fa037b73. 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/6a687489-5f1e-4ddb-9bd2-2e9a23616ca4.json and https://artists.proofprofile.net/proofs/artist/6a687489-5f1e-4ddb-9bd2-2e9a23616ca4.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 0x68b636950c2b947f90127b1d6ef2eca68e1b4b5cac48f7307fc24164637093c9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM42K1831514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c33bb9b77df449acdf1e444f74102a013be99523e42df6b30206a418fa6de. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM42K1790914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc9cf46010fb86275aca2aa979115a5a6b96da3df71aa041d3b78306b95db88. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZFYZ2077978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d051833a00f4c277bc36773c6d8b6e023f737b98241bb350619aa8baec3609. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAEN1965313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5e4f3b006d044663e12bed6a73cad6f23fbc98339d083a97056f00c653d8b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBA2343183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4baaf2050ea71b0383cdc0a0786a5c8ce80247a6ee13eaabde61a0c9a96c3db. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFJ2310970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c8fa944efdadef2c75b3e0d446041fad3e53f4bb51669fd7a81e07d1ccab8. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZWFP2389397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3581de52d58cd5a8d1155b9a469102f0961fd46e1cca12643b51f4404469abd8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA52475894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd228c0827604bc6ec06caf3607e8d12a4b04644e7bcba8f6624d5c83ebbebb7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6Q2471045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8288f060f38b49c0b31c1c38af44cf23881067d13258d4971b6e78275288e82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2498181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243b71ab7ebe0eb138b94099ada85e0ccf1833a308dd14cf9baecc71feb6aa4. 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/QZWFJ2453702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0b757bcd5381e9155766c6ee78ed3c766547d8d0e1bbb7601f4e926192d0b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ42540619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243b71ab7ebe0eb138b94099ada85e0ccf1833a308dd14cf9baecc71feb6aa4. 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/QZWFJ2453702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9542f378f7616418b7e9937317b01f4e548b2286e12134563a681d508eaf4ce. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZFZ42540621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95af2771e53846f687a60541b71eb0c981f34aaac3d71cd93913be608d37a1c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2304291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c1d46b9d8617b72f33470462663f348ddd3af8bcb2596209f5d5be2b1c241. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFN2440906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ae60bf4245ef153d36ecb7db8eac8e4f72aaa3e7de439199ae341ba8617d2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZFZ42540622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf91c0c512421245242781c63cf532b2786cfb48a4752e02202558777132ae7f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42540623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad7a0e3c4e71a729cda1f7c4250a202b152238ee94dc3823bff1f8eac9a71d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42540624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cf5f76118654a179a8f897be64ea0883b5b0f08b0da6f510a42eb65031b3b2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6P2300834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9542f378f7616418b7e9937317b01f4e548b2286e12134563a681d508eaf4ce. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ42540621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ae60bf4245ef153d36ecb7db8eac8e4f72aaa3e7de439199ae341ba8617d2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ42540622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf91c0c512421245242781c63cf532b2786cfb48a4752e02202558777132ae7f. 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/QZFZ42540623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad7a0e3c4e71a729cda1f7c4250a202b152238ee94dc3823bff1f8eac9a71d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42540624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5617c5d4c019d7bda357d80c413f33d17b984cbdbb703df8fe48b91162f745. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZMEV2520572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617810bb918b44478032d450ad13c96d58097a882b6fa2b39fe7134fb37e098b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNMY2517668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f53b583d7e9bfc90fbc834a12c5bfc3320dc08cd60cfe618a6282959b827107. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMY2535996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617810bb918b44478032d450ad13c96d58097a882b6fa2b39fe7134fb37e098b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMY2517668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474d887c7f7320567f577bc9ad44573ccc130992ee19298fd4544e12fcd5e682. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZNMW2574601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613634ad64dbfe9e6c2cddc7296eb191411d4518b52aa64920bf245b06a3bbf5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNMY2535997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875a4c2f4daa85c03558afe1a26618297b33f94c56e61cfdc4f4ee5f4325c271. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZNMY2535998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208b52ea589e483afdeee8ce7da27f306d59121bf0b1d1c38472b0f22f316601. 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/QZNMY2535999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd684f969a8b826e405d4a25bd0e81b992c5863bedf367cac245c497377ea3d1b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNMY2536000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a317d7ddb30fd1be2cd503281a5f9b9a7616c1fbc60238762711b00c2aa4e68. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNMY2536001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0978d1ca4efc57933a68b9117704e144491a71bc7acc38c88166e43dfe034107. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNMY2536002.