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 0xac6663624a9d3602b9f69dd41c372b5c76e45df4a524a288ab339e65d71006d8. 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/a77bbce7-968f-4097-9c6e-c452534c74df.json and https://artists.proofprofile.net/proofs/artist/a77bbce7-968f-4097-9c6e-c452534c74df.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 0x706f71e822dd50346da9545d82010523cfec7afbe91c0d90858ba79e14661307. 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/NLFL72300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e45b6f85658b50d26aba7e72d6c1b020a4ac7f1098536d83f5071be10941cf. 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/NLFL72400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b7972fd9b062b29a163c66c8f9b7e53aa9589f2a4b20a5d3624b5e52009bf. 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/NLFL72400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4105389e95b1139e235d3da697dffd83adc20606b33a24892d4cf2352d47601. 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/NLFL72400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30a1930f9f22a4d8d4d442a6b584d9291f3e4667e702632970c884764636822. 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/NLFL72400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbfd859b24908441e02d0ec2c8d9c122a736d10c1a61fa214c98e9e0121a648. 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/NLFL72300837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496a86d4bdbab70e43bdd197f9416e9abf87d4cf2bb31226842004ab4487a4a7. 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/NLFL72300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb802f4c5e861ad3aba00e5602bf9cfeb86f0caa5fb67b806b09a7ccc60d304db. 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/NLFL72300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e72aa61a24dd888ce383d3c8bdca78365c9efff5fe123aabb6fce87230316a. 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/NLFL72300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992bc87b14b034c803d7ad7e14ef9dd14e3d2a903adfebe0a008742655375dae. 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/NLFL72300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39ba626376088f8e076d089c78a53fdd704e90e0cdcfbbeb12898cf12e3a26e. 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/NLFL72300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1247bd7a134af1380fc4dfadae34ec47481a00280896b826cfc3074cd9e850. 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/NLFL72200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bfb9378d488665df160ef122be7b89a44985f66105248407411e7b444fffb5. 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/NLFL72200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804533c75d3a526cc2b1983bce714a9024530e4d1a08871ef565deb26773e81e. 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/NLFL72200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769221a3f213ab13bf3616b6fb45653d66a3085d15aad0bacb17761d3a32c77c. 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/NLFL72200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95ddbb974eddde5c311a7e2b9f9ce6cddf1b71fdb220ff7b846f09e96fd4f1. 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/NLFL72200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b25db87d5118a389bab0bc728ed6ff6ddabe6b83a182943edea0229bb4905a9. 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/NLFL72100637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8774014ef1a21a2e1d5060c7c136ed10ccc6c977a53ad4f15c971d3ee9fb170. 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/NLFL72100709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb51a7afcb81f99cdaab202c5b06a0ba11baf1cad41618d61a083827a244956. 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/NLFL72100713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857a2f0d51eb8cb0fc7a63d7e496febc56d3b231dc2b5105e67f7f1af81bb17d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLFL72100711.
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 0xf4fffb279a9f8381f39d71c001c7f6dacc9e4d2f56325161637472107f1f1f32. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLFL72100715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae0678bc0048d48dd71e6d699c7d3e8ddc8342cbb0375078aa863b1f783a78f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLFL72100717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6142d295f9668c747fc94e7ee5d993d472f7def643cfeef9cbcd2a7f03d330. 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/NLFL72100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc1a7527c22b77c3984d7a07d0627a25edc1713c0638661c974aa1bf07520fd. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLFL72100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326407f9d7e6f6dd04c2c070e4cd4b05ad9a83745b0726bbddbab386450a9a39. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLFL72100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86766f6f92e7235d229d564269403094288fe642ee9e5470b5dbd9ab6e081933. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLFL72100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec63cbfb01c8b8da83301d1c9d394c652ba27218a0ca8dbdb643e2aa3cd4107. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLFL72100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f361b3ad85f5dbb006931c4150ebf0e4bcfb3ed3fb04e97ca68a997b485094. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLFL72100177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a25b69fbc91a005cc4d8858e27ca1d2507d127adef9bf0650a0d08be2fadc1b. 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/NLS161802340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac38739aa093b0a0df27b03b101f17157a28e44c7960105d5403335510d5ef35. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLS161802341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92427995289e09939258eb482c46f6962bf7dd25a22429942c9fa1b91cff4f45. 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/NLS161802344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99bf570537c96f40d0923abe54f5191e23752044b5e35369bd2ac79b30393a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLS161802342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4006eade60a6004b2fd3ef00ae41d068bb9993c637a6e340dc1f57a3d3b83f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NLS161802343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2694b7fddab77bb3d12206a72d997996892626e71cf4924f391848b4a47b711a. 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/NLS161802499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1844d4fd09bef56c5b009bc8d35fff8008f98dfc4b5a07dc3742acffc99d63b3. 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/NLFL72200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf01bff72deb5f4d508e3a78f338aebcb7b80584d07787fa9a4aee2a9653bd4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLS161801691.