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 0x6b46d727f5cbd5cc2959156cff6de2c7c9bff7cff686cc1ab8c36759f37ab627. 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/fc03b4c6-64a2-4ce6-b044-9a99e16fd654.json and https://artists.proofprofile.net/proofs/artist/fc03b4c6-64a2-4ce6-b044-9a99e16fd654.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 0xc449a3eb9be8e73803bd6a257304f711352fa3fb03a66748f7419989bac542db. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCACM1616341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f96f0e80011a4bc2e21301742a377a07553ddf6d0469078b7c24467f9a7393. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACM1616342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79ee1c21d322535451b2d2c28dcafd6a26dad3d0c977934bb057b8146fa553. 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/TCACM1616343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c10be04fbcf96103de80057e87cc903ed907516cf4880ac539d202b0ab9fb8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACM1616344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dcb468a34b6c47ca1e0d436c8f552b9078fb1bf0d6ac006dc6a5eeb23e7178. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACM1616346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6af84eb27f2e246ba031ce784f54d87f0918a4ea280e675b772e5d469b6be. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:19Z), 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/TCACM1616348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1abd2e604a61e8803c352c3fd10421697cc033ae14dfdcb0804abbb592a9328. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCACM1616350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cbf01b81b9565d7c950906e817f5317399e83e7660bf39a59921a8f19a971. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MYUM71500555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe286e736c453b5b0fdf31279898098b4aa93261f5c6d87a36a3c6570a1b6ac. 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/MYUM71501020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78b96fa49d827849be596de0baf03f5b5e67a17e02264dd55196f34a4e5ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYEM18100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78b96fa49d827849be596de0baf03f5b5e67a17e02264dd55196f34a4e5ee. 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/MYEM18100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78b96fa49d827849be596de0baf03f5b5e67a17e02264dd55196f34a4e5ee. 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/MYEM18100019.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cbf01b81b9565d7c950906e817f5317399e83e7660bf39a59921a8f19a971. 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/MYUM71500555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78b96fa49d827849be596de0baf03f5b5e67a17e02264dd55196f34a4e5ee. 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/MYEM18100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b78b96fa49d827849be596de0baf03f5b5e67a17e02264dd55196f34a4e5ee. 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/MYEM18100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeaa00714d048307733de09f2b8b9001b88c13c026e58c1a1a46466da27d9da. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/MYEM18000002.
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