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 0xadbe7153a401ffb06fed6ab211dd5ddeb6680c934d4c9f4df6e3516175b220c6. 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/3d5abc88-ca10-4a93-8b81-27d550cb2bde.json and https://artists.proofprofile.net/proofs/artist/3d5abc88-ca10-4a93-8b81-27d550cb2bde.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 0x83def526792eeb71becd30ac634348f7da16102dcb07aa5ebe8d958c7c5476d9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6F2266457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55c4a10c8b0b589f28a4993e614abe479d02e0e13c86ee0b99b9594f9e48f8a. 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/QZMEP2320716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c93b760e3e46ecd95cba662b832c2d92d737b47127ae35bcc4f79bc5206fe9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB72359292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c037797f0f11da93fd068c0979562e4cdee9f9493900d15d262f2ae0d56d1fa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNB2433173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94d58c8460feaa40bc60645017f4a56cdf5bb2d346f00339214368170352e5. 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/QZK6N2444261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5669794a0def9e4c944d34e48c63a22fd3a36a554766f6ee083a796cd3cf6e7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZPLR2481076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4485738f610a45121908c1a7e755e1339f1a587559901295e4232d03edaa85. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ762499332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab42c64773d5eb9ef1bf36d11a82706240a6076f0aeebcf7315e40d2876e49e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:03Z), 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/QZK6L2505526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410b55cc97cd839b6b4feb23e68f88e697fd4fa87ed552d1191e63e5e6170d49. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:53Z), 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/QZWFW2594006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfa562a8aa8fc4010ff99fdc3fbb6b946253be942617d88f7242c17dc3b8f31. 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/QZZ782510773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdb9adba3fde372bd689eaf36617e48b433e7eaa838a24e0eaba4e6c1911c66. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:11:37Z), 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/QZZ7U2502100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9068ca95db6686822970a39e5d22a35d9be2c16a485bc00e8bac61a48dbf30. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:50Z), 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/QT3F62572633.