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 0x12645fdd687e7ed8f8fba1699731762b2051561aa2b6c9b086a3d91c04f8f007. 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/09946459-7a22-48bd-b500-1d130f884c54.json and https://artists.proofprofile.net/proofs/artist/09946459-7a22-48bd-b500-1d130f884c54.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 0xa502e9628ca041a56cbd1adae3ec7da08bc88d012a68c495220f0fc93d2d2df0. 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/GBBRP2200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8997fd9e5725d0a0c5c320fb1c048454b2b2cd0141854dc996defbdf64f6f. 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/GBBRP2300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd63b97aa809807eb9331d3bc0b18a0dd9b4c110199232f54dce16e139f51bd. 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/GBBRP2300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66901f66f9bd0dacf0bad4a95e6dc4cb8ab05855d86a867840b3ad4dae656a5b. 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/USZ4V2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5374fd84937d185d31584a967cb3e400a6a08716c3ea83347687507ad712cb18. 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/GBBRP2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b37d8a63d761af33771c7fedd5566f43c859aa9c0c752b1c0901f80aa78c7d5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USAT22210048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77794ac42929dc4c0269dc96aaa039d0d6214c3a0a8b2facc0fb76a972319e0e. 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/GBBRP2301146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ba598047c0ad19c02dfd150161c33fb8834dae65bb182e458564ec9fbdc00. 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/GBBRP2301144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0962acd29b7a8e72aa4970179a6c3fac3a96ae51c7160fbbc281d8d8d1063. 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/GBBRP2301145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77794ac42929dc4c0269dc96aaa039d0d6214c3a0a8b2facc0fb76a972319e0e. 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/GBBRP2301146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ebe3963354f25e84778a87eb55592029854c5ada45870ffc5600fee505a5d. 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/GBBRP2301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6befd0a8de60df61e6f46e30ed9bd69379a31a6d75841394671b5bc07e8b63. 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/GBBRP2301148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4677edcfc90a963b5983c335bd591d779e1900dd76809b195c360935ae168460. 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/GBBRP2301149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d18443c83db107bf0533a51ab1c29c9531a8f543592e5975b86d8f08c265a2e. 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/GBBRP2301150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f79a50ea6a5a11573bb61205f5b24ff7ebeeb9ee229460c6c14809ee62ce804. 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/GBBRP2301151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b00dbb9909c91e0c692f669673996e6854e740c08d23e8d30c7df17458d3c. 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/GBBRP2301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b074fd1e98702c8a8ec164dbe8e2a81e395415de50f70404697a8eb92acea. 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/GBBRP1895601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed44ec0fe0ceb8fcba2bcde85d6abe875632175fd9f4151e4ab6c8de35057a. 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/GBBRP1895602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dde9720adf4aaa5e98de674bd39f692f5e3e936fbfd0a8d9c24d8b6b315936. 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/GBBRP1895603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfc9e3e87158d85b6d31151e9d80982020aa8fc8be962e5c9e16fb9ff10ccdc. 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/GBBRP1895604.