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 0xf26eba2d82833f03d24845678f251e109422baaa5b1c38a7825db812d173e2a2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d32da9da-0655-48b6-ad3e-e05ea2ded689.json and https://artists.proofprofile.net/proofs/artist/d32da9da-0655-48b6-ad3e-e05ea2ded689.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 0xeb64b740d616cb1a8aa00f3dcebe6e851874aa36ee283bcac93f5e009ed7d652. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USANG2481952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5fe651ba0dd7562c79a80643822a34b02660ff33ab4004b468306de14c40d2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USANG2481953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5a004109dd17538b876da5c4bd9dc9f8c0c0a428eac2a6692214ce57983bf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USANG2481957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f756b4fbcff858689f10028a6eb2d03d67aa7d8998b93f5f4e6747de054f74. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:50:06Z), 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/QM3DF2400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf523c9d4e6c04c38c44ba85b885956c0f1b1d8bd414814611499174ad0bd9. 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/QM3DF2400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab768a517db079221860d81f97b8850af5921083233d1f01e590a194b6ae4f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM3DF2417381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001304082104197a2fd61b658c147036df57de311e95ebb19f02a5fbd67495c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM3DF2417383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3367fd9d09c579e296b1251705b1cfcb8f010a72c287509e6576edf6bbccc60a. 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/QM3DF2417384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e4e65af80b5be088f86ee29963568cbda084d716269a8829122d9262a68ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2417387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7615beb1fcc53101e5329404fad13f9bfd0b71240671f1824beea556400a55. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM3DF2417389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d010bffe686b88a0f702651f270557c83514028365c29430d2a0729e01d6a76. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM3DF2417393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb065adadea3f21e31a87e9e3d4efba834c8a4fe7c0cf1ab29ef575a3312352c9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:14Z), 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/QM3DF2417394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdd436818abb3a79d81bd32e22cbb12302def066511de3f6796617973e4d71f. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QM3DF2417396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007a9804aa492eb9fe5b225de4c32f0aefc0a66dba3b164c1c314098acf68bf. 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/QM3DF2417397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd11a02edc4adad39aeb4a29bf3a77072e0a4d9c8794d23956399059385a564. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2417398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad16a5cb11a5955feb782cdae4471d179c59dfefad2986efd763814faf3c39e7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM3DF2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb821d712bee71790c4908bfb699e9eff22eed1d265f109d7fadad3fe354a111a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:34:30Z), 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/US3DF2516375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5b84ff19a32e65d988b292bf463b95b8b3dd241c11b00692659948d6a2d098. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2534766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4594c9ff1c9e2d46f287654c9996c1f08089aa74175b0bddd68e1e96e174a41f. 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/US3DF2534768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c181ae7c23f05e6fc1ef669c57548f87db825aa99e3001c01c06f5a75c698. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:21Z), 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/US3DF2534770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848376959988a18d0ee5ed5da5ca52088172ad830077174d1e9373520d23a162. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:37:02Z), 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/US3DF2534771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c05cc68353ed9b73bff1aa088e3b1a3efbe94031014f94818cdaae0798fbd9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2534774.