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 0x4a9fdc24ccf312574d18bcb95849e9171b48db8e43d295c4a873239da46c21de. 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/583fb679-b2fd-4921-8316-c8179fbf490b.json and https://artists.proofprofile.net/proofs/artist/583fb679-b2fd-4921-8316-c8179fbf490b.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 0x636ba8bb2d79ad995f54657e8e2df2fea427ee26bce48ff28af7fbbd5739b02b. 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/QZWDD2287336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20c7de0b411206b6b4084638d50dc12847e808b1cec27f87a6306a0574f2d9. 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/QZWDD2287255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4492294658c4c5fa97528ee322bdde9c1ea65c840c2226bfe6c8d9ceb4ad5f82. 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/QZWDD2287265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2055cacb56198dd530e79441f7e165ff4de4037b913abe5387b98558ff206cd6. 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/QZWDD2287286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153795b140c6bb0a5f3dfa01756261402a18c5958b823e0fd2dd621afdb32fa9. 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/QZNJZ2317315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603d1d82d704ee614269df815cc6f5abe2773953a1be17866b80c18ec249f721. 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/BKF5C2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685845c1efe9353dd6c2ed1668a4b549c10262b637f97c62d5fd448fe713d41. 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/QZWDD2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35581bf7ef8df949584a57d261cee1f2f29c8869f90e068492cddf205fa6df5b. 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/BKBSS2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede69f6fb04e32456437e1b9996f89cec4500604a816eb04db420f1b8b5c9596. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5FN2469022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da445c12c376d34d068e740901a3e97a781506d3b2c997520686ecd33a1ab86. 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/QZZ8A2341932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b0051228a0995389a81200b92bca5063d7fe036e9c4ac22b2c6ed90bbcf73e. 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/QZZ8A2341936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b83e1912a5021108bbcc0e55c452d1a2be2ec53dc629b9117a316adfa461f1. 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/QZZ8A2341937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dbae5fd64e1f1911497bea33728c779f93319ceef983ffc5ddb27ddaa3d9da. 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/QZZ8A2341940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce0dc5e61699ba888306e6d03e88f752cc5b8333d1c7d4e86310870c48ae984. 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/QZZ8A2341948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33cabc019dcfcd5bb87e368ac81f3959db50d516e95ac567ea74c2ae64a697e. 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/QZZ8A2341953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e102ee7aeda06d15ba14e9b57bc159120d80228e5e1e833500b8bbe451fd54. 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/QZZ8A2341958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9922d9f3842ca6463e7be694a80c4d9a878a912643b8ed67e804d38af0e54d9. 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/QZZ8A2341961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6651b41d78ea9b580ab66393727f0d83e6a2abd0898741f7307941d2c1cd83. 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/QZZ8A2341969.