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 0xca6363c89694290c877c1deda004ed0198506941c2d09f685ea6559b2c420c23. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d495fa34-0d4e-4b57-af56-eea37a5e8448.json and https://artists.proofprofile.net/proofs/artist/d495fa34-0d4e-4b57-af56-eea37a5e8448.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 0x84234e9b9529af8acc2241c7bc5af91ec748cede3913fd887187b104fa9ddddd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHNA2335786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc2ce733052cbc8edd66aa42d4ef8edf3dc9e036d76d75637516d732c16e38. 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/QZHN72334925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe848923798da7ab4bf66c72a139cadd73a675bea06d3ad9a3e81f35da17658ee. 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/QZHN72334926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b51ffed62a876fdfccf02c24be30bb2bd1270c6541efc010284beca34c4a49c. 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/QZHN72334927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e89cb82616b6b27a254ec6936279ab03390b7990f1c986517429d67f592ce. 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/QZHN72334928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a9a206eb6a6d517db9b20e76fdabf152651d9aad92ab972946b91354272dc. 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/QZHN72334929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb41af991c4fbd6468b49a6fbba7e1af46c657a5fca1d8538f2b3d7e4337d5. 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/QZHN72334930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e645445e560ca6dfae5003e10d487d55e7fb9be467888741c5173a709fd9283. 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/QZHN72334931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2444b85dc737d3f3d09633b66ab88ef95df95062e9a8057e09f6e371185bf07c. 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/QZHN72334932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2d5276a26a514c1579b11237e10ac1d5eb9a6fd65ec9b7b586ec36a43b960. 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/QZHN72334933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878ca2847353d03b5bd422a2b634bc26c8209601f3f279c658c6bd6828025d1. 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/QZHN72334934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0656382e76202ae193849a591c10ce086146d288de21f776350d83bd1745724c. 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/QZHN72334935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d5383927d72d0ce3c5b9be8a16a957f383fc588ee3bfd3b39777b639286d38. 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/QZHN72334936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc171921493665a089111505be224a6d00dd918b7edeb06d43bf07731cfb3eb. 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/QZHN72334937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70635914417da301ce7400228d03f511283294a7c362395e8ad2d7c567eb9a61. 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/QZHN72334938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d5766722ace089d2d29d775ca74fe149b4853ea6fa9afc4bd35a039f1e169e. 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/QZHN72334939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d32fa304aff0fdfcc3bfe3c6c9a400aae4361d4bffd10b94335a33e552679. 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/QZHN72334940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fda8da02dcb1d84db9751a30f1e4aa44c3003a7179eeb19f182073735b697. 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/QZHN72334941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7756d7db9e1ea2a465d091c7dc5d1beef3768732539afc98ad56e80798bd5a. 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/QZHN72334942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c19b13f48e9970552aee13ce000069694170ad66799115df0561062b3b66d9. 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/QZTAT2411184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24543b4f72c8938e2409ca7a470818cd200e1ee54eb167ff8c89736cfcd4f836. 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/QZK6K2486824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01742332b1809253e17d8db91b53f6c0ea3e8c3f344e2d9bf5611108e051057. 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/QZHNA2485363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e42196d48fea63fef7c7539b186fbbb835e5cb4bcf74755f374be115fa9b1. 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/QZTBC2322090.