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 0x7346f1197eb0fa5bb9c70238aaa19dcf85ab0e44b90f78665a0047a5152d1a21. 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/f740732c-5a4c-4cc9-8ea9-51ef24eec22b.json and https://artists.proofprofile.net/proofs/artist/f740732c-5a4c-4cc9-8ea9-51ef24eec22b.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 0x878d8d7eb09d8db0ee2b54acb383b770010ab6feaa261d91adc4281c685e374f. 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/ARF412400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80671c3a2afdd6e983d141927229d16874f6c4002a99e3f8cbd532793d2a266d. 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/ARF412400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1b443506cdff0180b5e1be8373635c9cffd78d333dfebc361a9484d333551. 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/ARF412300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673f204b1193aa20ef04e6d1e17a8ed5a2c90bb20573cb0c98e15d44d4c22dfa. 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/ARF412400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1606a54ef3e51a31ccc6f69cb465d0778a18cf4606caedf1dd928dd1b50846e6. 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/ARF412300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99f0e97e84a918a093f9d19f204045fb0816ecfde38eb57d7d63ba4b7b650fc. 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/ARF412300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd743a0b767965b9f05ba05d8c00ae86d3677ed7b7afa6bdb74f460b2076adf9b. 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/ARF412200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc131e68ef83e20d16a25380d6744b87f5b308508649a4becb56082f12e82fa15. 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/ARF412300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61727fd950f20912693a1dcd3d3e80759210430e125777de9866a3ee245a9ff9. 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/ARF412400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef52a940a4b194896250c96446197bff4bdbcc1202faa3e454679501be41c6. 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/ARF412000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5776063c594879e9940eb87ccae8fed5b74378ee52b6d8f7b25f1c177cc33f. 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/ARF410500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2bbfbf47cd5485f1da848918a40e818935fb121168e74d6ba3f8fe67c5c2b. 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/ARF411600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513cceea1476c1eced76133b0fa3f233f8822ecef7170e4db3abd04cbb10bc3. 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/ARF410600528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad86bc36bfa8656c724db7a00419c612577c1f7c2fa9a52583fafb70521efa. 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/ARF410500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef52a940a4b194896250c96446197bff4bdbcc1202faa3e454679501be41c6. 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/ARF412000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89975792d0bffbcc46f75f73f177cec8906615c58ae89fc1e8ed1cf99d34efee. 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/ARF411500265.
Brazil - The Complete Bossa Nova Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb58f758b1a30e9f6e37abb86fa6a3d354c6d83bd66640dcee515f16468cc7c. 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/ARF411001213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc16a84af88d0ad29d79097454953d8f1bcc6b8c4f470125b76ba34718ee63. 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/ARF412000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e490deb86fb783021ec1b71208694f081b4715423e1ae720b2293462b20aee. 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/ARF411100992.