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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 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 0x46430e233185e297ec0fa913e18bca15bd16ddedc6a0675b16aa89c5297b64df. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68ee29f3-0a3d-482c-9ff5-f4873eefb619.json and https://artists.proofprofile.net/proofs/artist/68ee29f3-0a3d-482c-9ff5-f4873eefb619.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 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 0xb425e187b4cd58fbd13b198add47385ad6feb9183acab3e82ef63d5f4b21fa81. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2305395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c54c519bc77563fcc9ddecaf942d3dd6d58f28d4c8d56ad9c74729b3a208b4. 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/AUMEV2345638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636892e18936c8306fc900904ac8fb311f83d17b1441cb56dab8bbd51e6e6a90. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2305077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac4cb33fea8fb2e85a85daa74930c6130e3b7365b0f0ffdb0edb314a6116b39. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUGBT2305396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a831d47b6dc47b96f50ca9fef94367f172ed61e9b7f517095b881c121f4f62. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2385588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f124f6ff10cc3eb809e24c148955ef296f160ff793a35a4596877de38f42f9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUGBT2305397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc4d531c05e4e2075a3dfec54c1c34c9f60894e20492e8067e6fefae4a4946. 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/AUGBT2305398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6565f574779f0d82004155523b7da7b24de0915f94ece6585719cf85396695ea. 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/AUGBT2305401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df5b51a9999ccaf0859435ff9c06811a67ca2385fa442f00b7804a7fcf099b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2361899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd6b452e8103a115a7561823ab015fbdd76d3c7eb6228a4ecc44fbdf9fafc95. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/AUGBT2305403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be5fcc7c5a1f8ce9ee04ebfdd0a13f7cdf22f1cdaf25878ee38b9243961051. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2305417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83190526e5c0f79f3e4425614dad24b88df9f42cba456976fe6fa462ccfee3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUGBT2305420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33061cf6a817533af312d705e89d8200ba935d1a12aa8fe348ec2473cf4597b. 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/FRX282089845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b1ae721f8f5cc59a203a0226a52c2e4c5e3d298825e0b59703dae3eac8d781. 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/FRX202091059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b78b1519d3cb7fc64cc5850f59d9354b137d3f1f7a73a595e80c3b49adbe05. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZFZ71917716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66315f0e8f6abe3175c2b0a6c8dc53260a080236c5158a30e760ee8baaf5b22e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0L2466039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b351055909dd3085d1ff819468967282928fb785ad5432bf1d886410a4bd2. 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/DGA0L2466040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636892e18936c8306fc900904ac8fb311f83d17b1441cb56dab8bbd51e6e6a90. 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/AUGBT2305077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df5b51a9999ccaf0859435ff9c06811a67ca2385fa442f00b7804a7fcf099b. 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/AUMEV2361899.