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 0xaf0a148deb4c5349d23a6310a4a5c3e3945eef7612c53a69fca8c606480004c9. 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/17321441-0968-4d1b-b764-3fdd540e3e6b.json and https://artists.proofprofile.net/proofs/artist/17321441-0968-4d1b-b764-3fdd540e3e6b.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 0x62a642972d801c8e341c0ac4f49434bdb57167f846116582b99ed896db16dcfd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SE6HN1992749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c86db0b8416c6ca1d7fb1dfa94341bf51e246cc57282c772eaf612b4fc51d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6A91811551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cfb1f40e9c43a3f7e812d86417ad5c4d27a0a961e4af8cf234967183de7baa. 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/SEZ861700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eff87951088107b735e5e05e1b929b991e9e6bb6608a018e1487722101d731. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE5BU1766131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabb6c672efae8a1c9a2082551dfd2bc794cf54f1d04ab56ec66c1be9a819277. 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/SEVQF1600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100311a7c452723e097133281367667fec4e7c5cdf4ac8456b4e454b2cd65c3f. 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/SEVQF1500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57f6f7773a4c396a780a542cc775a989ca104ef035e5175c51ec8e1772426d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVQF1500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8c1b3875e6421ae20fe3f6907cac4150a00b7ac140676a4ad12dad38c428e2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BU1868683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141f73aa5edf3adcbde5f83bde1b2e61274b1697e84a4ba690c462f5bb4512bb. 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/SEUM71700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dbf8017dca7719e3944edfa4fdd54830dd8637e54446b4926d99fb108c05cb. 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/SEUM71700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5cdbd0999ec09459c6ff20a9a7f8857835467f61be060daaa01cc36ae7130b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SEUM71700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba915dfa62c1c38bbc7162361ceb44f65b1c6510839968dbf1a8ef668301ada. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEUM71600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e400aa6d58c01ef42120a7198eb628a1b8f7a585e658baa105447b00680a633. 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/SEUM71600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea60c2dff265b940f3ccc43eee65d897da6c381d15f508cdec4b4b760ebf50b1. 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/SEUM71601974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac2319cb8ec5ad9ae571d1b20cae4de34e9897ee10461759bd0571c9238a41. 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/SEUM71700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e400aa6d58c01ef42120a7198eb628a1b8f7a585e658baa105447b00680a633. 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/SEUM71600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52025b84d0d58a73d70e7ebc05401dc9a8314cb14fbc2f08be28adb9aa355b5f. 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/SEVQF1600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91162d0bc89438ec0fb1e3e7fcc2d4f313c38e667e7feca24c1d7a538215369. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05d477fa7b8ee51e3fe1ddf5017ea3c0b4c97506e185ce8d7d1eeba522135a6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052cfd4c9d80923a07a44607f8286ec8931e6a81ca729fa5b41504aa025227e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dea9e7a87c5d2fabdf06e0e0947a3c3af6b2734a60d044b55b7482782ba6dc1. 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/SEUM71600684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1216af4f29508d9fc17f3bd2e12ca414cc28e7745545d21f7fe8eab3d2b022. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a4ccd05de35fc47f4b8ca5b3ae0eecc6d5b0eb0384c7af0813d73899c024f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3371bac6687508bb39dfd8f31b095a361f457213eb749250ce91aadc610fd70e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc4f3488d3586e64b10b85c2326208dc0aabab158ef96cc1e3c080da20cf373. 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/SEUM71600718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d5bbc4352468a3ba2fb5b01cd4d056d3d606f5eba4a5910224cb45a8062098. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71600719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347b8f3d59870c674a56e7176feb8ff0d3282ac32342510f0b84a90d1fb6c45a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71600712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f8bdfa9d2a197d4b21b42b692d331253cafaa3021db3b695d596e9ec0cc6b. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/SEUM71501587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811b7c03288da12f84ac72ec8c4599a864ed6b5350fd936b181abaf5325e041f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEUM71501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe11589721a447d5e31efd59a890c556bcca8de1cafd626615bb9440a7f56e. 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/SEUM71501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6f82f8eb743031ef771523d7110db7be551e6dfb5e32c7048e9d5882ff4d8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/SEUM71500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8e35af6c21dec2b543ff65539a59d78c0ead6a9c6e3c23a5dc7a6aab72613. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEUM71501668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b6da48c4fcdff9718eb4410dd434b06f4cec42ef87209d2e8b9734255b4f47. 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/SEUM71701043.