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 0x490bc79288c73dc863108725a2c2424b97ca296bb16838d914223909aaca2188. 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/b301eed8-796a-47b9-909c-b3964f61a95a.json and https://artists.proofprofile.net/proofs/artist/b301eed8-796a-47b9-909c-b3964f61a95a.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 0xfa502469a796e5e97a1baa8b2c7b62ac0734f01032545646a1bf91a09744b1a7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BRDEP1600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9540d8b903d0eb858d1458faf4817b7235cfd24308814fbe9736305a732c6cd3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRDEP1700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f11ee3054799188ee46833a0afc2ce6f08913dbf7325d55c45c09fecfdc693. 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/BRDEP1700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2513eeba81a749e9179c192008c8c56b68054157c18ab65020f5e83020dc6c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRDEP1700087.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23661f350a2115838dbf07acc244162b89ee06cb3d9c722c68951ee20278bf54. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRDEP1700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00234f4c570c0982c55570ebc73954b67022f0f7dabfdcd3aff2f82d5fd8de71. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRDEP1700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc45712692b1e834616207eb31293b265748a3963a916f2c654abfea8727ed4. 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/BRDEP1700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e6b17a9e51b8960691991d75bd15a0149753add43d76ff920caf052fbf9c1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRDEP1700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7317ff8879ff76a14367c081ddc1f41c3ddc592be76fe230f640a06f71cd341. 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/BRDEP1700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d83680b26b7e17e452a9d6d034e2fcdba06f4bdef6c087adafc2834c325e00. 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/BRDEP1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1564695426db1b0c77378c6957d4db4108e59e163e188e25cfb04c1f0fcab3ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRDEP1700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e168b39b2a7bb559bf15af3c8c90d77d634bd0e5ead0d8db41db32c1acea109. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRDEP1700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc96068a505c1d24865d373f9fe62aab88e0de389450be1c8deaa175530a8ea6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRDEP1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db5af14e9acbe3807107a628182cd64997e5ffdb7fc18c797c78ae717553576. 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/BRDEP1700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220bd819a057b99079582f7c392dda0748b8e168d35ad3273179b26cb040ebf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRDEP1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf7a38d50f28f9b5a3317e188c881eecff956e40e5db2a6bb4e7a8b16ba90cb. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRDEP1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac7b41bec672ecedf67ad16a82f81a8e6cb7aa288569c5a4038bc460a9b2403. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRDEP1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb28d0a4a86b2b62878da9e626c13053778955620a1905cd852ce9cf43e0b9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRDEP1700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7439586a9128e92b6beb1bcf696ce0ef585ae643fda4a82d1064e70251088b6b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BRDEP1700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b3175111f699997833bf72d3c68d3b2b93d9d42e4e08d837f4e0457f4f9288. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRDEP1700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5a0cf12ab314811ab888be0b2a4b95f8e9bb134088c5aed2768521d8ec879a. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:10Z), 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/BRDEP1700439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe688a2021087ffd91f253660939c1ac8ecc66cde32d71b05aaa9281f13481d90. 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/BRDEP1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbe06584f872da09f095ec8202377347234aeb7811a81eb7a1b9d8db2f0dcb3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BRDEP1800206.
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