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 0xe0131c8132b480ed9883ff5bc72ed29d3fd14dfeec41fb920323b73b0a351193. 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/dbcd9588-b4e4-4c6a-9991-1b301472962f.json and https://artists.proofprofile.net/proofs/artist/dbcd9588-b4e4-4c6a-9991-1b301472962f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x8bc3500607fe65cb7be5caca8b0e84052b6ebe35f675b72012dfb870dd7477be. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/IDA449900985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44815c89bf39d754208a2127b5b3a08493a96299b0b84fcf2c1aeee16db36ef7. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/SGB502334366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c4900fe4efe9f511b96384d93f6ad9be17e12c1be5461fe6160f010922f26f. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/SGB502331607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b797f2d99c0ff0a32849c464132da0ff63da4521b354fe75386c54a7cd71d7a. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/IDA449901131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6054c8b31fc6d7f39d6a7ef2b3c3b16fb0101065de2009cfa0b243bb761e6a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA449901189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d59f5a028d9bc1095f6340e0b0252abef60fdf20f525a94f436e7b1db891b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDR012100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326f737f488e19e1cd8d8fc9a257522e5d562de026fa714e604cdff8944b847. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IDA449901233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c426a690ee57919378c0cfc32a0f4a9e823e1f0faf9b326b14a8e68268fce6. 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/IDA442402222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aff170222cbef5a31e5cce24ac051116b956e1f9fe84e6a3246a2747baf660. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/IDA442402448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9185c82700a8fb38d24c5f486aa6138b958ccce23fc06b911ad7f446a94a87. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA442402690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce069766e9443463529f056f1237744bfc964cd3eb6c68699221b198851bba38. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:32Z), 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/IDA442402796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c5c8afc31b5fb13165f6703ad1e32062b622859b7467d54d063cc3919c5164. 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/IDA442503275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2fa17a4db9aeb9da066f0ada45ce219bf472e7fbe9251d748ab16ba30cfc05. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA442503475.