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 0xfe90fe3cd3b7ca3e2e46bebbb851a61fd4c2ef575f54a02c7a415a85e1c2148a. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92d196fb-5681-4bd5-acc0-91ac4cb1f400.json and https://artists.proofprofile.net/proofs/artist/92d196fb-5681-4bd5-acc0-91ac4cb1f400.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 0x31e86627d695d606e861c45dcea54184326d3730aa897f995dff82b8806236aa. 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/DEXO62062334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8daeb62a8a3d0be6e46dd42bf1cf33635498a4b7239f85b1710cec4891be9b. 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/NL1ZN2000825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf26980c8dc54083c22910f3c618c29a6413c07020d5bc469c8cc6516c248a. 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/GBKQU2002412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb8955a62420727556153feca97d7d0af586e3a8b06e1feb3818d8ddbb8c3c2. 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/GBSMU6602342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7e2e8501a85bce700f38d45a1a8585ceeb75ae75e42506f5e7912ffd67ee69. 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/NLQ8D1800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1a69826b57e9565469fc93ea2c98acf388898861be922967fb11cf0ea01a0e. 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/GB2LD1800704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a199c00067393e7009107ace24c3689fc691e7c11b01a3c2441949f2fb11eb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:57Z), 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/QZ5FN1879025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e95ee95bbcbd3c678241d0245dd163450b41cecb0ca26f1a46e982673c1e52. 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/NLQ8D1700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d309b5a8064335912aa989bd931326c8a201a38837f3a75f5b42aee2c150fd. 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/NLQ8D1700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d4f478a423c8dfa536159fb1aff72c812418fbffe55c85f38996b8f404506. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:06Z), 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/NLQ8D1700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79cf6b21b22d02c4ef23b6e3f05db86c6dc132c2c4fd6d870a5d8588a9665ed. 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/GBSMU2704930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2f8ee5087b1430420445f93c463c2c0ae95aad35485c91d7f5afdcb3636a2f. 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/GBKQU1538333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804d67716b4556056bf8ff6e4c7260dbaac306d9b5eea513c6faeb1a639a40f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUVR21413203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e19d212da70677b24d522abb440b837f9cf4a58f1f6edec696a212fd187cf5. 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/AUVR21308701.