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 0xc48a58f60b2214083b2703b1696b69b3b7681572db9f6ad08537825973171086. 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/7a4621db-eeeb-4c35-8110-3bd29ab1d975.json and https://artists.proofprofile.net/proofs/artist/7a4621db-eeeb-4c35-8110-3bd29ab1d975.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 0x8dffbbced75f934fa07a4e100e5f0def04c0f42017cf9914a95c355661de0e19. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEQ2252095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37ae3a9dae1aa40dc241fcc09ab2f07c96c90387f37bd734565413558e93f7a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5BU2313957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30788c0f8bbed916ceffcb297643b8e7d8a3ade6aab222aa84cc46fec33a2c00. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2327663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29263290e6395ffbf17494e893c635623aa8e37aedfc35f91600e38bb9702df2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFE2313792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23725e7c93f0ff87d013b45ba50dbb76472f55307a3b30b2d04f5d3001815895. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZDA72477135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8aaaf8d7a8348e9a96a197417d9c018e1530038ea1fae8a7b288bb80187eec. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/SE6I32436261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc503405298aef420da74c6d21366644a4417c1c1ca3a7d4b5164d5a2bd6307. 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/SE5BU2547826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4149d6c48e906c398af34288e30eaa4ebadf069910ceb74d04fa0b3b7fad3b4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82560667.
Heartbreak and Breakthroughs - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194815cdab6f4a9e3421990efb78def20af0572a4743071b37373755f06b22e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:46Z), 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/QZHN62596163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc7a22136626e004a839606cd81ebe98edc1fb4a67def0788c644c3b672d17. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:41Z), 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/QZHN62596164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0cbcf13e736dceaaac7686b89335a57b7c903107ec3345d1c31e09b43c6cff. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN62596165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120baf167415db3eb622c2948609529d7e92535cca1a96933e99063295945ea6. 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/QZHN62596166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b54936e1947db2586268d2c3b926580f355df8274ac8edff0e3f0f1363311b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SE6XY2562205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3306d2d886a70dcaae2b9aa397c00a8f848faac56d7a5e4e8d79206b3abdd740. 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/SE6XW2554223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154999bfed8b2842265451bd604b2eac7b2394d67e0c5d77b42692109f2f9fcf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7R2540385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f2dfe4f54f8b773e706368f450fda384f4dbad912411c588d30ad1ced52838. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3F22585636.