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 0xd452776188e59920523aa00d8e2b2eb88d517894f2a391b443b3d0672519596d. 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/a2657730-510c-4724-8609-e2470b052133.json and https://artists.proofprofile.net/proofs/artist/a2657730-510c-4724-8609-e2470b052133.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 0xd79b9b612ba2d48a07d2bcf3301fcabdda9f43e834a305f90161cfcb8a1ed4f0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BC4NN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf20ad5219d1b06f59f26e833e15773ca9a652180b052e6cd573cf62f87456. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BC4NN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83591e8f6001362243f6efd96e0106c3df4afccf3ac3456f371a642498b246. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BC4NN2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79b9b612ba2d48a07d2bcf3301fcabdda9f43e834a305f90161cfcb8a1ed4f0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BC4NN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83591e8f6001362243f6efd96e0106c3df4afccf3ac3456f371a642498b246. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BC4NN2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b376b1b29a84159d212579f1a21be10b2eab5e794f31ea5a028debf527487d0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BC4NN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf20ad5219d1b06f59f26e833e15773ca9a652180b052e6cd573cf62f87456. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BC4NN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb569a363fa09f2f1d1521aa5591c2bb7d7eb23209f50b6b70e5150dbaa95156. 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/BRUM72400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7091679558e3585210f0c9dbc9baac4e556a04a572bfebd09b80846a340c3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRUM72400379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c512157533551cadeca7ab73f82b0ece7fd7b83fd133b581449ada286e7438. 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/BRUM72400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c512157533551cadeca7ab73f82b0ece7fd7b83fd133b581449ada286e7438. 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/BRUM72400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50213d11d30dfa21fd248d2221a1eb7c105ce68bea1942fd8743ede232d6f6f2. 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/BRUM72400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04394f7d2e35d1c724a701b6696acad8acc0b600b06a6ae32fbad513384e0260. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:25Z), 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/BRUM72400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beadcb1456b14e9f47faa339e3c7b088357778629f6f6474772ffd3e64e2acd. 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/BRUM72400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe3889b340bf105ede4366901c296beda6f472fe151b48e8a28ee6d711e8ff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BC5ZU2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e49683235e2c4bc7614b5aa391650f732ae3f0afe1a91c22a91a2d3f6f375. 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/BRUM72201236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e49683235e2c4bc7614b5aa391650f732ae3f0afe1a91c22a91a2d3f6f375. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUM72201236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147ae9fa0bf40dfe2373891333b87159648307f325ff862aa59645fdace1ab6a. 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/BC4NN2100005.