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 0xaf5aed85d40139e6b9f6c6d44ff6ef8294c619c3f0dd3cd91ae22e1e7a16e1ee. 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/bc5220ad-fa07-4cbe-90f9-7dd54282971e.json and https://artists.proofprofile.net/proofs/artist/bc5220ad-fa07-4cbe-90f9-7dd54282971e.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 0x5c6731add7040a9bade30df53101cdb84a41f0d2a701b65963fca53db2e49209. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SEWDL0630403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce7d4f045993001bdf2f0d5c3fd32c2288d4e666964ab63e0fbe376bc91c85e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEWDL0630409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0e7ed2610917743026efd344d77d399674a9ca2297ae036167493fd9efe718. 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/SEWDL0630416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef7c8a8170c31da60bf4ffccd6955a7054b6f6fec1b55b2a6a5459bd56f8b78. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SEWDL0630418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda35fc49ff84fa49a6856d78816ddd6d6da1e363550394455e47d5d62fb01229. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SEWDL0642904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44806fcb8f6a7889d7c10db806ba2a50226ecd659fca68eff9bda71b0dacf42. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEWDL0642917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69619de6e2c74f6dafab814827ef6ab4547207b41d83712434c298bcc8379ce5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEWDL0642918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4262c2135ca15ae73fcbbeefca18c4db60a98c153b4aee50b10f659bdddce1a5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SEWDL0642920.
Isle Of Beauty: I. David Of The White Rock, II. Oft In The Stilly Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca4a67799ae333d5f2faac7f6b8f358682e5783255f46b60aeeeb71c3dc492. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/SEWDL0642922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0ea2194594f21028cf643861431a5618332c6eb2af396729f471e41d9ab78. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEWDL0642926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03aa3baddf8962cfe796c54ad44b83d8f2136184cec44a1250970bbb4c4ea94. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/SEWDL0642927.
The Best of The Band of the Irish Guards
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03aa3baddf8962cfe796c54ad44b83d8f2136184cec44a1250970bbb4c4ea94. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SEWDL0642927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e54d07790e943ec3b445370aa56d15a53af0f22f145ac24471312c6410c3866. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEWDL0642120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f750692c82786a278cc709a215c2454566f7763212fed989de67ca9c13ba37. 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/FR6V82284655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bb65926eabf566dd3f9c2bfde00e55502c59deb65390896328d3e5724cda2b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEWDL0642131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77b158d5316786bbd75aec81e3c048513657e0a186cafb5d279d46fae44892. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SEWDL0640509.