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 0x64cae3db98dce8a8e994fde22a9cd4f2cee1d240d7a8d7e99b075ebac4786974. 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/f0135b06-36c6-4379-b780-193bf7dccfc1.json and https://artists.proofprofile.net/proofs/artist/f0135b06-36c6-4379-b780-193bf7dccfc1.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 0x909eca33b96df065efa8dd270ca9d0d667ff3f0b69b244076e6ed1af35295e0d. 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/ES19B2200574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff92166015fdd5f74cc34e74af508c50428d64c7024411c6dea695669b4d20. 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/USAT20101755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec9a74080c2d433c8766a8cdb2012c8a302a41ac3e19c33f3b75b4230847e1e. 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/USAT20101756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dc07e10716f820d4e630516799681e431918845cd49b4586eaea5ff15f6535. 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/USAT20101757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c923982a24822b64afab16dd91731b183211f58e03062315ff93ce80c5c0a. 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/USAT20101758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02293c4fdbd35505dfc72bc2a6c3dc308b7810df96282d2cd2460eca73f9d170. 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/USAT20101759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990dc83c89b89f841cff6ac0c2b833293a46fefcaa8725dc819d4befc869454. 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/USAT20101760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390559453294e8cc2cbfe7660df61d146ae87380b1ab42478601def4dce8bf7f. 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/USAT20101761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd90d2add5b00b824ee4650341863cc42c1ea5e48241784b358cfafe18ce1d7c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:33:30Z), 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/USAT20101762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8010aae2b1e12d051f6a14459fe48733e59d1a3fd89caa2af82251870e172c. 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/USAT20101763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa902c940d874748663c3e2b51c1720a8ad4df0a41ab56c38dda980d2072058a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT20101764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca271ad85124785d767e454aa701dd858e95da8fea9fd342eb51f942f25ae95. 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/USAT20101765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec1e67f8ee124859163ff95a3d62d32579eec5e116586cbeb6722bfd294af90. 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/USAT20101936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68378331df7f3674921109172df5486310c0e910ea94fe2de47116c5f4ea94b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT20101938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4576780cf9292c218ff1a76ad29684125a56670cc0304cdab50b857c8136d681. 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/USAT20101939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c94759c159ec7d89645ce18c32343a5173b45926bae4846ababd001983cde3. 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/USAT20101940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946f32c23994f33c08da162ac923afc7121e525ce9606b9295bccc7ea20acea. 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/USAT20101941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34421d590656ecd40223a1f39e298ce2d96fe55d2ca67119dd416ccfb1c3a561. 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/USAT20101942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b84d69a38114bfb74e05b992e4da5d39ebd9a20bd31cae534074f4dca44f9. 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/USAT20101943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d76970187a85ee4bae3b1673f9be15f5bfa6c8ee78088d7ebf0812f704ab2ed. 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/USAT20101944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce72e2ee4b0bc6f029e0b299b71eb4eb0c286c3395692219fa08895328c16fe5. 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/USAT20101945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b29b5cf4d680fc76097f0076b9d41d10f4fc4a0919b9b765115dc53efac32e2. 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/USAT20101946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98f97296f3d0b568545d435ad31ddc8a2eb792a95a5bfb8285c9382f1073793. 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/USAT21602709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45c04b66d219c00f6e1db0625dcbed69c8e47d63d4f44869fea062f56eb0803. 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/USAT21602710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdec57f43013a2020c05d7c3a5d3b11544985ac3e459c27508524f80dda9f4c2. 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/USAT21602711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915f606b6d9e8590650a4b082f7f65ed01249c802dbba332d76544ac4d2ae55c. 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/USAT21602714.