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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6ee21d55e01a2da69f4fb99ce96f562e712d91603f8c6f40ec94e05bae5df1. 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/b72f8195-2a28-4744-8896-9118b520d484.json and https://artists.proofprofile.net/proofs/artist/b72f8195-2a28-4744-8896-9118b520d484.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fd96cd8a89069e0131f9f6cae17dabf280a209a4380d34842132ec47b2e562. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA092370383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a2bb3724a12e7f21a96e10a8c582f47dac99faf3406193248fa6bac3dacac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR26V2040983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63d6596a2c882c7aef26ab8c1400c6b8e5eeba1eebe6982ac26bd0b31ca0753. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR26V2040984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b127b5aad07ba56b11520372b2857b19c6a2180f21b03317c2e07963eb6dde. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR26V2040986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5f58f544e26863fb11a7f414acfe9303bded5602c2448aef411ea68c45990. 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/FR26V2040987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757959184ae9cf0ad1a2cbcefd4ebab5f7c44a6d437d334d7d96bc7e8c5a36c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR26V2040988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c6ae75c5a1bbd541358cce709e8514df331ea6ca34eca29794a258e2110edc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR26V2040991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4f4874d1137f8a9de0eaf0e8c53a3b51d14532c4f356790afed3376598c6c9. 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/FR26V2040992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14556a80f66d7e75bfabf0ea2a193eb495e2e8fc2b25d450c113edf3a13328a9. 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/FR26V2040993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159ece8a591f66e68805b08a64f05331e88593fad74ec73da7b30e304c20dfa9. 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/FR26V2040994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56b1ed65a02e4dff002990ebfe8d60bfb0db47c66f44261d928e9bb1e118f66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DGA0H2479682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7530b42338568b4a61acf15b221679a159c69a2314fd6908886e9d210b1b5d0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX282416819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dae018c353677b3913213ee69426ef0a899168787b0d82d2b0a013159e1331. 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/FRX282337259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bea33121afe19894bd443e158c4fb2ee9ad0e7f8e048aaecb233206cbd9cd1. 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/FR10S2387709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31905cb43826dfbd655e46dfe51484261de2090a8f77ee276101d5431fc32cc. 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/DGA062272929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc4432c39885fc137dd7b1c4d7752dffb8473842f56107bbd679a4db2d89c9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TR0012200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23109995606b90ff79fc4849e8c55702814bd069386e71085943b4b9d8fe06fc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR0012200244.
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 0x4e35cc6c027924951bdcc7d1718a95ade60930ab7eb998afd3c744f8a9e833f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFME2132898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2631dc82cf1bfbd11a497a2a4e287fe643e1ba5bf68fd2d74d8eab6651972342. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N22121777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd6ca5d5819274217160b90b3a411424f6d4708b4776e45b9cc29d82a1bfa6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME2046576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4625d3020a2d5bb40a7bda62bbc28865adbe1ebc58825e48331b66089b273589. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92051534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806823066368ab73bca9b535ac8aaad7a530bb7e93724e0b72b699d47eb02ec6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL1905744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe3fdfd14e929c4d627fa4158e19636e4ea32e19dee0641f68ac8cb94e46b2. 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/TRBHL2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ee6b3ccceac0d1703986d04beb4680a917ab2d728996d4d78f0ea00c5364b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TRBHL2201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b5c8f74f778576777a6bfdddf3dc88c97eedbdbfa8948a3bafee3052686335. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TRBHL2201203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f6880800ff09b35982d464a9c3ec6e02f5b7cc1b44dfc6966b9fef938b3e0d. 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/TRBHL2201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6627422b26626e49c79f50e2c59a91d3e90f2214d1fb54126f8f7c26984b0e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TRBHL2201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9da0760a29698325821061b8f2e9fab35cf9d724390ddf194f77f5c8a11c03. 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/TRBHL2201213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c8f3944376b819f0fbc21be0f9621d60096a3648e5e8eeedaf4ed83763a906. 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/TRBHL2201214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9645459ac2265d3566cbd21da13a3c1559de4d55158c17a7c905727203855e. 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/FR59R2110280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521ebe1f7135f394661edf2bdc41f23e3443ce334531267f09ec54d85cc43d8f. 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/FR59R2110281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c4674bff4753d78d34bdbc91221e01ad378a3fc650d13f36265046a0cb9e93. 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/FR59R2110282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226813686d7b00148e16a4b3238a3b38d80c4ebdd95012e5fa3146d20ad9c846. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FR59R2110283.