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 0x44ed2f38f84d860fce49709627013dd6dde7580852ee2d8bdbbb462fbeafd8d0. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43e3e905-13ac-40ab-9127-9c08a5ad3265.json and https://artists.proofprofile.net/proofs/artist/43e3e905-13ac-40ab-9127-9c08a5ad3265.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 0x25148459dc168c2ba3d77d63a46a5a5e17445a45bc9d6ba1d837f57ff3c6d35a. 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/US3DF2233797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab3cddeace60fa0b009b6087fa45f9297d47197bd9b821cd5330ff5afb9fe8. 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/US3DF2233799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bb47232bed601d03189e111c041d2965be919ed949e9e24946a605631889d. 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/US3DF2233800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb4aaa940b9e04676067c8911daa746bf27df28819d8378f257199a5640f98. 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/US3DF2233804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0b5d0c95e4b5bdff22de2f7bce749700779fe767cfa859e7bc65b6196fdb1. 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/US3DF2233805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118b3fbf884d466fa07b5b4ec2b719ac16cb0f9b1809d68f2be3822a0c69cf32. 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/US3DF2233806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4df14702ad0ca037641af97ec63437b62fc403b4eddc0f987dad75e28d220. 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/US3DF2233807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8979eb2f79bd54137e56f4c97bd864277908970e975034628a232ca7de09b4. 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/US3DF2233865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff135f355f4106a18b69d23f7bd7bf7c881bcf707570adc795365d289ea1f71. 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/US3DF2233866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072789e317bc00f202dc85b01ff440e548496b69e17f438541d237519377a9a5. 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/US3DF2233868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33614a6e269cb27d22ee1018e2dac8dd06e9777139cb93880a3fc4a09792ee4. 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/US3DF2233869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a872cd49475a97cbe4001bdc5861ce56b8e373a5701386a2e103fafade1fb78. 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/US3DF2233870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c5237c8135a728bbfd97139b430d6c8038b118fe68a93911c70ff54c779786. 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/US3DF2233876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892df5962b541b7ac33f20c616b49d366cf613421c4ed8ecf5e5906af0ad3c0. 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/US3DF2233878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6e1802934bac7036127d5ef1e2ec7a563e341f62ccaaee23eef904b80ec6b0. 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/US3DF2233879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9524e7460f1900ec9193f49207e0139dcd4574327b0df95d7abdc1f010121de. 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/US3DF2233880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff4d17102d32a1243f73154d48f251e1bfbac0e18dafec204f24959200e1f2. 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/US3DF2233881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a620bdc68725504a9f41193010355f54524f0a2befb5f14fd09941ce41254a. 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/US3DF2235906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7331b4cdc5fdad0d1355a9d5f2a2c6a3814add7502aaea431db5483da111784. 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/US3DF2233884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493123ebc5fd1613deeb623afb96d0c3a371f4bbf0d257ca0f35a76fd9735c41. 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/US3DF2234962.