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 0xfd253736cfbfe3c4ee237102399ce96aa20a601c2123de1a3c4aa8acd5b598ee. 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/1d655d29-59f5-41aa-b9a7-c3456626ede4.json and https://artists.proofprofile.net/proofs/artist/1d655d29-59f5-41aa-b9a7-c3456626ede4.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 0xdfc2a8104208ea2f1520567579202f6d5179ec49830d8c4dedb799275941e87c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:43Z), 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/DEXO11932265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098597db5c2e299aa0dc1656519d88df7863c64ed0b66dc30ea6ef8bcaa8d14. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:39Z), 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/US83Z2007242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5e4920467c4e09ebde46d99f8e056689ba7933321410b0cb1a4a4080c8675c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEY472275526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c429240c5011ddff190788f2a57e120f6177a8695967965036c17920b931b3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:15Z), 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/US83Z2237240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ddda1b15a85706b6db16c79bb5cc0fb00d5d8add676536c6243d000039b79. 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/US83Z2237238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d2000ff7d77eef2c997918bcdf7e6b16ff99971ff250e8a6fe21727a07adb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:33Z), 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/DEY472279544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73f0ba1057e0af9d77cdc646ad04d859a2224234ed4a1b97dcc49fc5a28d3af. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEY472376896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d5491aed270b919d5fcb458bd2cd465010a4a50f8beeb92971427a527a8d52. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CHC652400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e345336925f7757542750dd80c26ddc0ad8307f81d99a7c3acef0c5db1d706. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJX2509976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e491654138166f9ac8b22e7074d667b399871c0e0f41101d08ef5ef4ef6db. 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/GBENL2303735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9414c1b7bfeaca6e2a9d45043c103baacf59271aa45e57379aa26eb9cf83e61. 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/US83Z2315675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88afef139e1717d43b037a393c94f2a53cb96cf54e5cf26ef676e13c29a65436. 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/DEH742011855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042df6ce63685793027b077a65a4a6967194e20ad9332426dcb4e24e0c5bb808. 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/DEAW12200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3401ec0f54506e6a7461465188763f015aa9e3ecaabb971e932b96dbfb3c66. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITFGO1900005.
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 0x09a87b0dda8047d9d5f9cd4497bd9dd96359dbfa863cc46e2cac69bdef985b5b. 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/UKACT2030951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6df657851033540d38480e264092a2461fe69b0a47be8ede493fcd8fd6687b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA2P2356693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a000fd03496a660d7919d9d993ce537f1a5b0daa48cd3f135b99a43baed680. 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/DEY472081031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a576bc3f5a9e8dedb955afd472fac61485f10eb50a4909ad7faf569375ea02. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEY471983053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e8dc4b726fc33b4194313b12d8ef8df1f4ab1814106656260e27e0ceea8326. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEY472170757.