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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de032a823db8238ca58c868736a741ae520b0c00f591b51e7b8896dab3ef419. 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/0828775a-4113-48cc-b301-57d6cab31f72.json and https://artists.proofprofile.net/proofs/artist/0828775a-4113-48cc-b301-57d6cab31f72.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 0xe3a02c1e61ee18a1024be2be63b2fab3db5ec97025ec5e3d90fda2b89e1d347c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:26Z), 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/ARG601101815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77bf86a25bdc78918fb94a1cdd6b573218e9a48405b75860f99c3dc3e1403ac. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARG601012240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f719e392aacee60464dc665c6a0a8ebd3191837dedd829a5278dca4f4b88608. 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/ARG601012242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962ee1dce4f08e612f64fa50b8cd874f4d77f49148b06a7611063263aa37082b. 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/ARG601012243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfa35e7aca247d72bc48a654228bda81d8990c798ab22ff2eaa9662f20bd9e4. 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/ARG601012244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770f30c270ad8015029ba9cd349a9df0a953b50de1dc77f980706e47605f675. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARG601012245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c9e10ee09f498b41fef96b53c1eac5bee1f0cc1245cb30224f16a14efb917a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:46Z), 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/ARG601012246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88232a7c38450bd2c6e8c3de038df5ee6977ec0f6da9dc34bc2bcb2f7323bbd1. 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/ARG601012247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db75e360aa595cc23fcb2457f74da7aaf5f85420b9798a7ff9be79f34e6c449. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARLVW9804401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e3d7f23c5a1fa31c644c61c09d3e4adfa8bc1ae0cd9622395457a199c2e15. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ARLVW9804403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e0c3c3b4142dd99c7895412cb16edf0983f609a5d80df16b330be6ca602fd. 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/ARLVW9804409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6acc4aefdbcefd571a008e9675d23ed1cbbd359e9f9925f21bb803a77741f98. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ARLVW9804411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b2a970bc7e640c3343a94521f8a2bd8bcf55497582c47759bc4ab2f0e60bf. 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/ARLVW9804414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1472d3ead1e2b1123e0a5cdf9202b6d7c14bb35b99eccc64b198794980c87b59. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCABX1412367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131ac0598a984c4e2d23fba58ca94c5ae3d621fad4d2c94b7dd584c6816469a5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCABX1412368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303de05ad14fe7de97cfee45c94c2480b4b8867afe8f995096c11407c0ea5d69. 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/TCABX1412370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca25ea8fce73e279c52dbd05d9db9557a424368872af4c95b94103658ea186f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCABX1412374.