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 0xe267ac3073a7cc4f06b7820d5300e3fe376b9cf302a7608bbceb7aad5e62e793. 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/edf11b1a-d0ca-4697-838e-8d95f318a0a0.json and https://artists.proofprofile.net/proofs/artist/edf11b1a-d0ca-4697-838e-8d95f318a0a0.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 0xc60e8759422a6354d71999da95529b396e905b6398c645849253d2a8590217dd. 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/NLQ8D2100664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5caaaae12ae4a42df1b091d14aa5d8f7964da7a37be505cd26b8cc91333723. 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/NLQ8D2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d792912514a7d6957f6fe8bec129097379fd6cfe8c65c4add4ff7afd6caf3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6TI2317493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e4bb889ef2349a859d743974b2ac46cb891e30b52476adb37bdfebff4834f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ8D2000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacddf89501c657e0ac906d83f759e2c19c1790d52ffa2306b87f8de62f2c3273. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE66N2207076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050e0eec490f7ce9553a16d0cbe1048ffc4af41b8b0ecc88809990a73a9c2987. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6XW2252494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ebcff63a4ef83559140edb7a91fa85c130e07ab9328e4c5dcb35aa4adfc1f5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLQ8D2200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87820e12dae2aa0934f2274fda4a35792be4f4122617266b52fd59dfb905c722. 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/NLT2H2401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8502fe13f7206603738f4a00977a20ecf082ada678ad16a7b6d8cd71a237d117. 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/SE5752494867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e8489a5423cc0958f2daf7739e4de3085dc6750f834dca0cb088e30fa197fa. 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/SE5752415832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32931b8e3e381567d3ac96969c52bbf28962929181f6b37c8a1b41ad90193e86. 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/SE5BU2401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef2f85825acf4754ffbc7965240e70ce1054e8cb9500a322d75079e397b844e. 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/SE6SA2355743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab1e2c6ebcb510df971cdd0525172b74b58f6718694cb0de7bfd56c6e7e785b. 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/NLT2H2300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d8dfd196cfe5e41176a45ea5e4726df96a12f83bd74061859fdcf444f6b6cc. 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/NLT2H2300744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6436be3d9dca7ebebfbbb04db5a42544c855555aeadebfe4b5cb5fcb8695f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LE2327803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd286d048c2ac2c343ccaf82a5ce2498a6ba71daccaff9ba8ec43b03f10995c7c. 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/GX8LE2365920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12023238cb0c27211adf191b1fa6f7af4820b2a45c187fc42dd2c20cc112c925. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LD2298735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83030194da53521eec275e0a1fed9232172fb7fe438bda34669b22452443e6b1. 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/NLT2H2200877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41adee02be1834d60fa35ef96be82857f712c0a7c0e7fb6a2d796b862ded2a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZP7F2102605.