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 0x43ec6080dcef7d8edd3eec2d73acc42a2762bf069817fd11caaa4f8199fa8090. 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/a5e4ca2c-b692-41d7-9a65-90829a8beb94.json and https://artists.proofprofile.net/proofs/artist/a5e4ca2c-b692-41d7-9a65-90829a8beb94.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 0x6cfc8e7491b96d6254e2820711d3d95093acb88d8ca82450d75b0586dca506eb. 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/DGA092336191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44065ac56f40ef5b17e076e4c0f5b3b3eeb06b95cd0ec2e4baabb1e4982b61. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA092336192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa82a94c4053806ecdb1109a75e6f2316c6db10354cbbca43fd6f4a1a45228. 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/DGA092336193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5e68c0f1212bba80e72094142365739eddf75f1e266bc9502551a0a2d5a03. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA092336194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953488f6e1e26f64ab7d7060eb3119ae89a9c483577628f9e8953f155ea61a34. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DGA092336196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7c471eb989d7d041273a461e2e8fa113fca6e36f21de627bce108694b77823. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DGA092336197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282ab67e915d86c1bffbabc8bebe4c014554e6c18cd81484b0f9f64c9758d97d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA092336198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e8e0be4ede3898d75fe08303c3e727a190ce71b2183d4a920db37709c13331. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DGA092336199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f52893ec3d8c05f3fffce37a1ecc9c686c7fde4c32d46cd9c6f7ef57537849e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA092336200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b44b99bd5c977797aaa905d25375b094baeb1a4cc423302b49e1dc8f016d13. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/UKXN22342996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008f51e74dd78337086847044b71ae90e2a6120fa33d397601168b0331ff8f2. 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/UKXN22342997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9980e832e0af4327fe5847924f59fdff9d7183fd1ffca507f9bc7809a5d4ceb. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/UKXN22342998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b54bcf770326ab68f3e55bcc3054c87d27a0648993efaef4f3fadb79d4a26. 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/UKXN22342999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde39d96334d77b247fdd5b4d2303d2d613b4769891aa867246eb326ef6e0c802. 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/UKXN22343000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f253f16932303e8f39f6f8b900da033b4ab2f943fad72acd888aae3e0687e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/UKXN22343001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0face97c540e807d47417c0786accf159690ee4f901290c549c3c0d00a55895. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UKXN22343002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb331b24692350b78d4b51196418c1f0461c436dd5c29343d1b48fa5f542d4c93. 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/UKXN22343003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978f956ac23b8e4b8972d05cb232d991ecad0f3dc167dbd1f3a27c1e48f50225. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/UKXN22342945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85872394ecaacdf572cee8cc6a5c9c9f4054d167fa4c78945801b32484e0a851. 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/UKXN22342946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d77fc9eaf13e84765342b00a99a7944866bd8465109195fb69b3807051d4b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/UKXN22342947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffaa5d422057fde825b838d25b5f0c3ecd3f371e733c4bb632c93e043caad80. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKXN22342948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc982dcdc7293b3cd11949a306606fbf4f0e3ed4d04766f82a62d8932e2450574. 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/UKXN22342949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8c8913f8d65581c1d2e9548c448ebc210ba3c30a8a98f550636af1b224de97. 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/UKXN22342950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484e9956955e9d33a594655451a1ad36eb65222a160f03da4fc74ec1341ff21. 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/UKXN22342951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf4f18c3f515df5e948634fcbeb61704babee95f5850e8abe7363bebcd20c8. 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/UKXN22342952.