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 0x647db6fb43483e4e52df2902eb8bcdae332fc3c16b4934b1c5078166214e0533. 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/498fc973-3a8e-485c-90b9-40fce3f75cfa.json and https://artists.proofprofile.net/proofs/artist/498fc973-3a8e-485c-90b9-40fce3f75cfa.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 0x15565e79199e302e145be412708ff1df1bb0b55742a33f3c3489af6425ae3b4c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ52152612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa83b5c40dd327a5eb74b382046c533b1f80d43a58bd896d8cc6789fc3befa62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2140481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5571cb0fc8ac09bbc8ce9152cb7933266202671ae1d7681306cdd42c20df5854. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU0088052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ddc3b7f9f70608509a0564bcd08349d8e6d78c4bc7ccb3f67c9304fd9d6da3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2145164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e95c9f0664a5f75d0c005dca702c681bfbe96507393f39e11dc9f94e823f67. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USA2P2204212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bed2614d1be0fbbb5d04feeefba82d4561d3ed2fa099cba2cdfa3b839c6b2d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES82217537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2edc5010f30b0542c0f1e4d5980acb741f6d0a1b7690fa8737ea25c12a91dd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA2P2218368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0c86831e0c37eb086353eea7bbaab4d89198fdc95c95b8d1878fab90dea17. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLRD52119870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fda1e1454e331f3855f506c6905aef508f6763799088fd3c466f27d626d3a6f. 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/QZPLR2286241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4c1debc3f86ef4ec1cb55ee6f38d9cd21be4a2478b27274873bb86e90362f. 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/NLRD52119880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cc770fcf7327b67545ac4b3c68feea80964ea9093ba48bda2ce2e16e0ca170. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLRD52119884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b14f31d0b5558539e4626b17dfc1785f1a8f2ef0921174d4021c768a18b677a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ32322254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d8b7be26af27cc296e9cff66db16db169e1060c16edf0893799376a1c671e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLRD52119891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa169ed9d118b45dcddc07bf9eedf00464291026994957ae1a6450273437e2aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN42301460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc003e38eb8df20a2210535df7066fdbbf6356d477c15c062f040e3839df95a10. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42301461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b37fb490b063f6993889044fd1d291261fda7a1f4afd4a4207cd453bb7e0e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLRD52119896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36208d849e2cf8e9aa0484f43087c2d4442d0b9250d381f408e66c2fcf6f3e59. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX8KD2394215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e2ebc6c314227296b48891ab569616c2e4aa4cbe278e449068f921ca67868d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZTB92303598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6724b1586ba4df0e8230b83a82817f76288f676584988a7b7828df95466b2c73. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFYX2473072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739860ffa49dc73fca91d8cad6e34986941e8d68e06698602ac200a7705258e. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZFZ32420795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ad71d1e746c306a1754ba6eaba988aa5ade1f1a86eb935e45087935374c7e9. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZNWU2469829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4e31b78bdb42fb3ae5f8f8afe4c17e1798006010f8ab9fe49789abba4a9d6d. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZTAS2428881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3e5f96e171ce553c75f0964ab3b39959038b1b0eda4dfd7f42a0ce9dd5f633. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAZ2479948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdfc87b6d207e5c5afea0a4ac30f16024287db408664b1af7b42fc865f992b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFF2437277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd43b03ce1b3e28e58167a2c6a40873b9eaa4784bdd8be8d58f5984dea0e5df2. 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/QZWFN2482672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c46b8e5e8fe64561c4339a62d008816a5f1f755f82a4932ce7d89552614b0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZZ772445909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60e3b202c123812b7c5bd3adc4274a6348789b0f84847d03132fa5723753802. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZZ7N2476456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdfc87b6d207e5c5afea0a4ac30f16024287db408664b1af7b42fc865f992b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFF2437277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabfb9a895ab62c22a3e56a218e6a1757a8275ba2d63fb090dcc08a8c716a92. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3EZ2410694.