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 0x55fe1a5eafa8d00bae03c8e3cd72424825bca87e9870ad558e03865a5b4ea554. 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/e0573bdf-1abe-454f-91f7-58ce64b7f96a.json and https://artists.proofprofile.net/proofs/artist/e0573bdf-1abe-454f-91f7-58ce64b7f96a.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 0x4dedda6c23369e401fd0d8c598d59d484b38e189cd303740dd78ca8eae715616. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZN882275710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212baba75f689d479373b1114622b8c5814e2eb590f0b4946414b9145f5ef26b. 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/QZN882300518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cc54c82b99fe20ff8dc0538fed6f645f851af8a5bd7f4f32980fb0772ce183. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QMFME2226453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883e172d852b28bd7e568c75e6d6bd49a1e0a10c92a6f74ed83b1fde80eb1b6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWDW2221762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6928a6ecd48d81adbf3b08dd2e52c9e89ed15af8fe77a67122f11c4386d84b1. 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/QMFME2288665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22efe034a72e884fb0a2d327baba7165ce603a905071222a11b6aa4d6b7fcd3f. 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/QMFMF2225690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c55a9885df9418e6f3ef033ee34c3e4df90fea4a887c1631444ef0aeb721a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZN882322954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01100b6e9be12817c977bfcf2026c8cc1d1f0fac0e755748d9bd3c2b9d21be97. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZN882330872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd344baec65a0f38dda0e2c1a9e0882932aeefb3e093dbd990a5d58266cff1299. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWDW2318480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e56e0259dcb8817082b3318842f680797ab34a3cf7bd40cebf5d8213e16fa8e. 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/QZWDW2365201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c21f1262c04ca3361f0cd55b7914d6b9020d630cf9e6ac50d293259bdbde1b1. 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/QZWDW2384395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080c5a2a61f58f12192e2aa4164851dd214abaa1f866a6535bbfe090c90325d9. 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/QZWDW2385397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2eb4199ca52e2f63e6b6cbb0083744d6c9e835fa04bf295792d78cfa28555b. 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/QZWDW2396329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c4bae011daed20cfba05accf1ad587d82030d4490a15107153fee0ceb4355f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZYFZ2343278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fcd0cfc65afd3ac906dc3e9abc62a527a1a5863dc0cd3c7975a925b0681e48. 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/QZYFZ2372007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531137be6bb241d6e44ed4588a56dac476fd2ccbefd07aa7bba20bb1de88780. 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/QZYFZ2386714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8a1c18dca075b59a7a25d32e3bca5c7a3d2a98fa2ed20ed0cba5c20083a95. 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/QZZ662300951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47df66d96dba7bc7dd0e09a6c6025364c2c3aeaa34b6ae005309ebfafaca87. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZZ662314880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c172d74783169f163215aa7839265d55fa04234a2911c71998cc704bac8419. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ662367348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0259d6a55df54094713f7c8841c28a300d4345a48baba97366821d401edebf26. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN52444224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c424e70ba37245e531797384949ab024e1c79d4e7f2d7dbb80f32f672a062a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AEA3A2495506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c9d79cacbe568e810d2bf5ffd71982fa222686686d9ebe42795c0698e3d73. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/AEA3A2215993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6269c88cfd5413108748ac34e0b337094e521541615b6149bfd5f3e1b528f7. 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/QZN882574922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc998fc811f525521a376644f73fe71be33d59b601ca31845fae2652de0dc0ed. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWDW2537902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217a04867b4594b408d3c4356ca53930c2381a6a065d2191bb451aea655b482. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDW2566688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f3001d918884bd44731642f58bc55e3e080968d1a78fce0cbe580ea03d4b7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWDW2569918.