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 0xc9343262cd552fe97e109c8c63d94e9bf199fb3c4465eef2240cf41a24ebb10f. 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/a2f85b7b-5648-4968-ae70-6aa367b3fdeb.json and https://artists.proofprofile.net/proofs/artist/a2f85b7b-5648-4968-ae70-6aa367b3fdeb.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 0xf48695f74f913766dc76d01a3ccbe4df2ebb970db1b05f93675ec84cd97c26e4. 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/QZK6H2353575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d179e7d60d17fc3feacd747b774830e02ac06c1618f480c0680f3bc60c727. 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/QZTB72360004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4479df4d308aa78000123d988c21326e3062ccfbe04faade3e5ba5c0d113d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTB92393165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3f8070208eee247b32eff01a699f0cc656140783a883cddc5910e4b11b567f. 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/QZWFK2348114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2bfa7af160dbece5316fa359d5c0e00f6f24c7d35889e2c905b3c7eba21ea0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN92469241.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f6d1f6fccb72748c77b99a5a48e1a45bc418f75c69b50ee1814ba15416136e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:41Z), 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/QZTBE2437157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50253e8474a25db4d0add07718dc5d07b71fd43c555ef62ed97f3c4515f05fe. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFX2474669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3776f0fe9d641692c0595505384d7f91a20c35b2cc8b18a50fac8212806cb2d. 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/QZZ7T2419602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cfa58db5151768a5e87e2fc556eb88256dc46038273579bebe22c50b40a854. 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/QZZ7T2419604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b312e6973f7bdfe5e1d398ef67f741357b1591000ad9a1bbee292dbeac1f3f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ7T2419606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545a6a3673172650a45deab9cd7d59a4320b3a2ad05076f08c66a724510c0a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ7T2419608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3138df6dbe92e1fd73e2e68564e6681cf08a116e9da57dfac9abdafc31bcf9b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:51Z), 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/QZFYY2564299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38bb5db00ba552d67a7493b50b0fdec050d0099ed9dccf875d1d74392bcecee. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZMEN2568445.