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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 0xf9971179ef5535f5dc518c2ddc4864d6f3e4e9146ef27eaa23144a1e1fa8bbae. 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/2be5abca-8e9d-4834-8092-19e12d399e7a.json and https://artists.proofprofile.net/proofs/artist/2be5abca-8e9d-4834-8092-19e12d399e7a.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 0xbdd30c106b28c5a8260c17c67c49d707e693b30d44bdf7ba90a772867e39f3b7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM21888979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520e3827e206dc22a0fb0a7935832a283e4c49a94e5f319fd0fe81f6c0af1166. 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/USHM21888980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d9bcba523bf4f484b25140dd56a81e0969783f608c0a64fddf09a7c7d15f9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21888981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f38aa2663cf6a9d89f63e314fe9851d2dd0baa122bb74d7674607494ae486. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM21888982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08751dbc1fb171c7ba0b06aa4cff559089c722f14596f03500d45bcf8488d7be. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USHM21888985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd30c106b28c5a8260c17c67c49d707e693b30d44bdf7ba90a772867e39f3b7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM21888979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5035cc12a861cb58e4c5c7cc7b9af68588b197ec6c6c58f65c43eb54aa3fa6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USDY41534744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590866c3e9ebc70f249b261881eba0db404829ea3871e2325d6d3dbe8b89b52. 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/USHM21777478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5036592814a2f218806966eb700bc8115dc57518c693bd3a36e96217faecc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM21777473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ea1d9398130082e373365aedc1b5fbade0998ccbc1af1559618db7456cfd4b. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USHM21777475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d6d281dfa820999d34614f59f0b24dd4280b6619227c2e8bd27640b7b2024. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USHM21777477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565117fd275f4e0e3dc186943f21d5a3a9f38011c824cca6fbbc01fdf88b193. 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/USHM21777480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16216a9d39c4c5f09e6cd55f0ef595d71545132146411a804096ad68ef4a0c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX452128901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63513d5da4fb7c3a23abc1e0866ee1b320c4a018f5940274c2285ba5bd153f62. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/FRX452128902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f6d71b212a6f36e37524325b01d0ce6dd186616af716bfec8fefdd1eaa23f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX452128905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb838e2f95df0e255437e43888fec4c75320a8edaa8b309161c9c52003316e0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452128906.