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 0x38c70fbab768fd0621c2c1e745b1f8ecd07b9df252b61322c3dc07ab4e26db78. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1749f024-a613-47d9-b5de-430cf62b754d.json and https://artists.proofprofile.net/proofs/artist/1749f024-a613-47d9-b5de-430cf62b754d.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 0xa4b71ba8686c6ca740f6d39d06062c88e6f670b543d400087063fdc05d463e75. 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/INY171300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d67f0787c4d17650dff5706205a85265efabf8f7a1483a4a619b35036feeef. 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/INY171502464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cab052ac6eb854ff4c5a7ffafc6379c9115ca0865114a2b47e7fcfab07f99. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INY171400008.
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 0x6b0dae010d188b5fb59045d2a1f9fe1c8cd03fd365a48509868911b4b61ac12b. 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/INY171300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe549d2eb3cee867b218942b6cf625d0dffd7c8aebbd5e57064b989b5a1535996. 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/INY171501917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e133de4f875002f8ac5a5d54eb5c375d9873c63e8685cd1c5020bd940eaa23d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/INY171501883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a39a5d7c972849dbe5cf6d959ea603ad2f52475ca8aa7be4524589271b83b6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/INY171501877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902510547654fa3029fddd97e2c13422a3a7dabe1832ac7d27770be8fd7b97c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/INY171300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb752f54206ae0026fcb5522b75fedafb05aece1955f467b959b8add6706c6f0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INY171501870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5abd2b98dc0e1f9b453161d0237736abe5731ff777c34f49697b03df3b2d86. 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/INY171300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7784f029e2b638edb84324342bb60115969f95edc78d1ad3b965c7220ef38. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/INY171500352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c0d4b8c65dfd390b06773d805475a6e423e92a55cc2da2f7625932ed0bd97e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INY171502010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b33e28bf5e8c80f5f01734574a17e9755973ea8bd93b913efa3d62f2ad3821. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INY171502425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa197175133e1c7d3320a3a67ea84e7efd22d881f30ee7c9c5a7d8d6612d9eea. 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/INY171502430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620327990be4abcc0df43727265fbbab261ac176dc1168c590b2828580dbff1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INY171502469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717842ce54be5d3afc26cda1a2411bda6aba564c03123dc60315efd7e573ef93. 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/INY171502426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90a7c7ccd626c2bf157e08ac811a3c59c97f5f4eef06fbe14c0341b429bc46. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/INY171502429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ca6541238c4fb9aa8f0610f5ceabd7480e78ac05befef6d8f5d4d34324d00b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX53U2427005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35bb1fb76be8f4df352da6490400d108c103e010bcc94f818560ba493b52c88. 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/QZP7F2437149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5a06e28a3baead62db92d9b3715e8e3c4b4f8f8738271259102a5efb6cc139. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZP7F2435680.