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 0x75c06549b6fe4b9f320fa1289ca853e158fe2681cf6224515c895b38102f9f99. 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/7e542291-c45d-4746-888c-bd6e9db7bb12.json and https://artists.proofprofile.net/proofs/artist/7e542291-c45d-4746-888c-bd6e9db7bb12.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 0x219e3d855af1300ae071a7242d1428371d552eb119600bcd31c6577549f64396. 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/DEN062500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1470405ff19e7473eab10f29f4a5819ebc57908e4ba7e82cbb1d1b4e76c96. 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/GBPQS2500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1d3079542f3e8e5ec1eae62ae8cd670c1692d4183a14d2a8eea5ebf425a07e. 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/US83Z2513684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e41a5062e1cbb61285f8cfc791a74ab6b3d1064c8efed0939a9062ff4602c. 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/SE4MF2500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d187a171b67f3f68cfa33b143b96614f778dbadca0233a70144b9f4c90b1c. 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/GX8LD2583838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0ce51f0770d3a56327d3337ef269c59d9d704b6ccc37335fe3c576a208d082. 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/GX8LE2554914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064ebbc1ff3645936fd53987327f7f05f63860771b6675fb0d87cdbffb98dc07. 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/GXBNP2500861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0539db04a60b5e7b0ddb95777b38bcf3d3a28d2640a407a57ff5f1bf8221bd. 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/US83Z2510892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9ec855f926297fcb4ba8486733a5cedcd6a1c059103422b5db78f6bb428727. 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/CH7812529969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fcacacba4a7163228bae344cee6429e3627d20ecb5219867ed10bc0c99408a. 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/CA5KR2514055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3f056f7aeb62c37315b60740508fe3882d0a6abe32e8315ead9a0005e7cdb. 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/DEUE22532496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a3f295af2750246a5e6f20acd71102e9b7316525ddde42711267b285bf066. 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/US83Z2508983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f45cda1125c706ca944936fde1f624c725c933dd76c2c422182df2d9ce6a8c. 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/US83Z2508984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244d15cc6462562e1ae6776d3786e13207cbbf16e8699f02b8e1f5c9921a5279. 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/UKACT2520134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf732076352061c5b3024b630f3987843c37c33346821266d54a2d32656becb. 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/UKACT2520135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3017553721205240575877ec97f19794ee33e553afca0147d2968260d120b. 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/US83Z2505066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23cf9a652eda89cff7a53fd7a67019a59ff25bed031628c0351c58a38a3852c. 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/GX8KD2551934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc536ba21f55db6b6295baadcf5fd187fd5a5208a2faf6b5d1a8111ec7bff0e3b. 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/US83Z2505032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4bf2e16dca7df9a8cd36cded1172a90df48d7e4948e49fb9fbf5b99a38c9cd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:45:57Z), 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/US83Z2506642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b87e6bb61517bfa5f06998b3e82a241c28eb4dea54f30f96a9a9a7903b434c. 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/NLYK92500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f66eb1ce6faf93a90103f6113064eef0e653d84109d36400ac2d18a5286bb3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BC7F22500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab9b0036ef8eee1f97f125775f5b6afeb576f5086ebaa1d3df5ac3b0c593185. 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/US83Z2505304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf5e5d5da4fe21c1b9a51ef7462458540acf02b362ddbec5e9bc39909a766d. 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/US83Z2505305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe7c5cc3768d4c2ff60c9f312d58d0a1709e2db5aaaa4ce0161f9ee414d6b6e. 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/US83Z2502778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9687e82def959be7045f7258d989ae85f15cb39261dfab50449f4ce128d2187a. 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/UKBJZ2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b22dfe3cdd13fa0975e13c7f78a4ea359f42a2741f6b7b680d67f12f1577a7e. 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/ITYEB2400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293214c39c199630c52b322afa9a99f9cf64e027f7b485c75e69784b49d05c38. 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/US83Z2423619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d119cb66ab50bb90d4e8035af23397bfc7a91c946b37a3468fc86208e154891. 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/US83Z2410719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da419f73a8cb4116e40acd3cb2f0597b0437bdc6ae1a8f61cf6576bf9614c95. 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/USA2P2471794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89a6dc92c44bf897f0272a2ad5dd255b05f72255746039432611514be36d89. 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/US83Z2419961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24526f8805d948297de8fc73f8fb308f45b46486ab6ac3ecc0b8961e7efb8737. 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/US83Z2420858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf7c4ff1703a82225c3aeaa796bead219d785fa1eebaaacc9f97a046fec5a62. 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/TCAIY2463920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b522fcd04375d4d34855d987d15802a711a9f93a742f7e5f1872e4794fa98. 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/US6QR2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370de1e8aa7b5cd07f2a4ddeefc4d2a714181c4c04eed3438f349dde4052aaa4. 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/DGA062289734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510b8e5965b549bf193b98561e8b77aa93a529531feef29abd32ebc71951daef. 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/SE4MF2300569.