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 0xde75a8399dcfe565435ad88e3270fe535a0ba1988ff8e654b90d714463ee2b03. 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/01200724-6035-46fc-bd25-e3b53d22a245.json and https://artists.proofprofile.net/proofs/artist/01200724-6035-46fc-bd25-e3b53d22a245.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 0x0f306e195c3b4aec6093eb79269246907b1d40ddd376de023ab0168ebcf8fbca. 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/JPPC02410340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232ca45887987c8acfc665dd042665b34a5fb113b13f774a5385261db040a42. 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/JPPC02410341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a89022afab8ad9539bf858b21cf07d1da82f95797d5361c1f6ce6591cfdbe. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPPC02410342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4074c8f938942dd668ec2b8da4c7c8eb6e82a89dca49f29d3f02df6ff04bbe3. 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/JPPC02410343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fdc1d7ccb00f4ae67bea3b407671d8410c4d6ffdfbc6f3a7f5ebf024874ead. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPPC02410345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f45a8d025c48c150deb4897b3a885bd840adb6008890ab2ff27aba3337761f. 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/JPPC02410346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8b6b7dcb0f623c6ad444b9613f947aa0409dc8e2a87fd5f122fa8b252ca7e1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:20:00Z), 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/JPPC02410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecbf52abf8fe17c2bb24152b2b8e84649256278b85434f5db85d99c0d93491b. 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/JPPC02410348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3470e913accced62654dcabbea5e83b243609907862487296a154c766ee25909. 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/JPPC02410350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4458cd94e2769077275520fdfc7bd3d9bd8055d62a0676ca0f77bd706b712394. 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/JPPC02410351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b5684a31c543874b239b29ca1afa36bca71e9a9ed053fd783a46cc5e9843a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/JPPC02410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776ff1f95ba1250287581180cf7a3fc920b278cb2d7ed4177c397cdef4f7e81e. 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/JPPC02412556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115ad3e5fb09037d7b2241aa3ec2d2fa0f30700589e2910a9a1a891f15c0ba8. 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/JPPC02412558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1636eb7b4c962e889c5c8bd409d2683d1ed929da542a79a705934d02f559f. 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/JPPC02412561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064c1f760740ed9a599195d37e9ff740ccf395d587a0822c5fe2f36fffc5195. 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/JPB752300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbced06f5b58bbfae4ba4e1ab60b5f5052414ce1bbfaf13443b4a0a352e01f12c. 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/JPB752300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcfa5ccaaeb68875569997cb215fe53641386195685a98552f104306a82f3dd. 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/JPB752300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfc4dd58b01fc9fcecc019b5550340a084bb168b08e0a13c9a0363318ad3e58. 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/JPB752200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1c2e0280adbcd368eafe63dac58827fe52c2d0a6fdb82a5bdb79d558e9ce8b. 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/JPB752200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c87a2429ed63e9ff1438a19567fa300dd6d4fe41f62f5b559f87deaf9125a9. 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/JPB752200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d12b4212af72ca57defac28149fcda966e5b0327c68167d59dc4510f5b3ab5. 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/JPB752200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870cede74a278eea86be95b6568fa0452af598e102165de4ef37cbba029b0f09. 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/JPPC02510928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c46a6f8848cb4ce05eb27f06781754c385d5fa8eeddaee394ec8211d67e70. 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/JPPC02510929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66a096e3e8bc16e0d577598fce36e15c816cac10c8102d35968bab04719b3d0. 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/JPPC02510823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0435ef1b59fc050d014d7e85377474d7dc04e8d3ad22ef311104632e91e3f. 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/JPPC02510113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66a096e3e8bc16e0d577598fce36e15c816cac10c8102d35968bab04719b3d0. 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/JPPC02510823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b0435ef1b59fc050d014d7e85377474d7dc04e8d3ad22ef311104632e91e3f. 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/JPPC02510113.