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 0xb7fb07dd1cb6a8d553cde498b77691f374a538eb1aaaf961e45a1a5564f72982. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79c2677a-660a-4f32-8895-d4a1c3e2d6dd.json and https://artists.proofprofile.net/proofs/artist/79c2677a-660a-4f32-8895-d4a1c3e2d6dd.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 0x97fa2a27c52fdfd28c6ba73f6dfca41baea1b64b78a0f54e98976bb98e4c4ce6. 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/QZFZ32407091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a195b2422f89ebc6cbf925be8d770d4f58a65376c392e5026c5d7d5762ce757. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:58Z), 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/QZES52411760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ed97092288fe86df8393c045e425b0862f4fd7faf9ad98969a6a7409e7e7a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA52453056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7094eaba66b385edd448de3d33b5d276d539a3d5ae999014610b1f0a8ccb5be2. 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/QZES52411762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95b29ebe7c64c8602085eebab3b6c1b354f6d70da4b40b9e183e4d707cf5c0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES52411763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c262a1c6caaeede97f3105cbad703b31b8c5225db000fc8616124619fb30f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:58:59Z), 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/QZK6G2487380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4870a6b5cb2fc16556fe17c1deddc32d6dc97cbc2ef3846909dd2481936291c7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWW2465441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca89e795cc9caf088e9eec768458691ed50352a74c93adfec408b11d5daf7cdd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFN2487420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905fb2835c3b61a52bce7fc1aed25b4fe9b862e0ac3730f605bdd27c21037d62. 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/QZWFN2487421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6bb240c5d56b82c32e45554b148e86b2cc76d5a3a4be7cab668938305c6a0c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFN2487422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c215871140d1df697f70114ed6e302fec4caf0323794eaf6c54067ee3737607. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:02Z), 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/QZWFN2487423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1ba2713e91f22d2506030ef70e86c89680bcc18dc1d75fd2f7cae283927161. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:22:50Z), 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/QZWFN2487424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217e1da3bddc0f3ac1d903ae0d9472acf3131847e8a18fe810814738698d54c6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:11Z), 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/QZWFN2487425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e46dc66f471132c30a6644980283fdf1d18568a1bef5a8c4c832143d91b922. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:38Z), 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/QZWFN2487426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0c5b397290072dea6bd96e02b4df07f4fcd7e8bd3a661d8c3bd2618bfcf788. 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/QZWFN2487427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b633680b5389745d34654a3925fd4521cf91a3562db73015cbc1f190722c278. 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/QZWFN2487428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59194abcef81e62950d3256b05b84b4a1c905f9f10d9d63968bb0b98f79526f6. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:21:41Z), 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/QZWFN2487429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b43f70294773bd511422191fba69b91f533fb5e474433f9982f84849431c1b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWQ2573542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0110cd95674d3c166f0892152e291d8684d2a16459c023e1f5c2ed9466860355. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:36Z), 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/QZTB42549634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1018e6cac45568f9eec82389584f8f1e0c70b67795f44dec01c6ac61affa679. 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/QZZ7R2539031.