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 0x58f5bf7cbe88cc00993fc5a03f6b305a453f03eb4f64f809eec3a1c1709943c7. 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/6dd5bcb0-9dc5-44e5-b96a-154c51340f66.json and https://artists.proofprofile.net/proofs/artist/6dd5bcb0-9dc5-44e5-b96a-154c51340f66.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 0x2d0089c2fc2d5142ed564e99bbfc44e90a53143080a165c5d5b60065b4c17f25. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCACS1659531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeed494c57c142e30fbb50c31c78c56a5a4cd64436863fd4a7205fc302b4d0b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCACS1659533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca47edae4b9da6633b28e5dc7e14c17a763f2dedf63178f227b35c1534fe8300. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCACS1659534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b55bfbdd84edc0d028531d5fbff43fa1335736aa273c61d1807108931fb125b. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/TCACS1659535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08c580b42bef26954e1a2f0c80f27db535fa20056522efe24614ac3c33ee8ff. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USHR21811307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e9c23aec4ceab6cf6701da3b992dc8fa9664a710a6f50404ff85e41a87328. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHR21811308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1031abf8ae7547e228f293e536db6106140e428f9f14ce86df0114ba0c6aad90. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHR21811309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3724d557d8eff01d08fa62d3b48f139ac51367e3f3d3b0e1e7971dac7a0071af. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USHR21811310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ca936f92effe789f261965eb601a2cd91fbbf7a92dd3eded396f125c1faa4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USHR21911303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de28f0e568a2f8a18a9f0c9c9c95a3eed2f8f31af3ccda1e8855a535bbe24d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHR22111301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd717dfb0cd1e8c94440a157f11f4e345adf4d1896ba0bcb64843de8961a1afc2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHR22111303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4114f3d3b0f07093d8b68c2bca4903315265a83ea9f216f44bfee7d7c5eb8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHR22111304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18871f729e3651eceec91ca2546599c02fcced01617c7e3c9e59023bff6ff7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHR22111305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b18871f729e3651eceec91ca2546599c02fcced01617c7e3c9e59023bff6ff7. 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/USHR22111305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cd7eb1bbb5bbb1dda3194c73b1cd4c33b5d1f7589b9f998329642d19392b31. 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/USHR22111302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd717dfb0cd1e8c94440a157f11f4e345adf4d1896ba0bcb64843de8961a1afc2. 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/USHR22111303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4114f3d3b0f07093d8b68c2bca4903315265a83ea9f216f44bfee7d7c5eb8d. 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/USHR22111304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c29fcbc38c925c2a21e3a0380e749f64df6ea5c4e917d51e53c3ba953d1bd. 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/USHR22111306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de28f0e568a2f8a18a9f0c9c9c95a3eed2f8f31af3ccda1e8855a535bbe24d. 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/USHR22111301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd7621b5f5ad4afc4e4ebc2002a37bec5c2348ee18102dfc63aa7d78ba5cfd1. 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/USHR22111307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba648c1c6a4badc4830e75c19a2a9e076485128b9b5723c07732b2041d76e4e. 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/USHR22111308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727dec4a91240f97e0d15b78eb29b2f61123d1c4534693f9252f256fe67d4bd1. 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/USHR22111309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe443d43b60ce308e12dadea58df697cb54bda6d976d79aac88b0b1323e1104e0. 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/USHR22111310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5d630eacd820d735dd1b3a6cd73f0c120c222b73aa850c3604585451afc9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2466828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac8d4a8303a9ec51b62f7385a4ec5cf2c28d20cd99ed194e35595fb2e90891. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2376194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a158b1a56624bd85a0046dc73e1779eb86db9a23a212fb89274a54048a9008. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMFME2350326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8452c2e16977ccd75ce793cc9987b0f0d5d8889f4c4ed47ca613afd4300e66. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TW2492054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01d728ed7dbb1bddcc830f6d44cb6d49c8a7ebf73ac3ba3d40f93b76787192. 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/FRX762170621.